1. The document discusses the effect of strain from the substrate on the tunability of (100) one-axis oriented (Ba0.5Sr0.5)TiO3 thin films.
2. (Ba,Sr)TiO3 films were prepared on substrates with different thermal expansion coefficients to induce varying degrees of tensile and compressive strain. The dielectric properties of the films were then characterized.
3. The results showed that the relative dielectric constant and tunability of the films increased with compressive strain and decreased with tensile strain, consistent with expectations based on thermal strain calculations and previous literature.
Apresentação do professor Pedro Grande, da seção UFRGS do Instituto Nacional de Engenharia de Superfície. Palestra convidada do Simpósio Engenharia de Superfície do X Encontro da SBPMAT. Realizada no dia 26 de setembro de 2011 em Gramado (RS).
In this presentation on External Thermal Resistance we will look at the thermal resistance of various substrate types, thermal management with printed circuit boards, and examples that compare the thermal resistance of various substrate technologies.
In this presentation on Internal Thermal Resistance of LEDs we will look at the definition and significance of internal thermal resistance in LED packages, the path of heat transfer in some OSRAM LED packages, and the calculation of the junction temperature in LEDs.
Apresentação do professor Pedro Grande, da seção UFRGS do Instituto Nacional de Engenharia de Superfície. Palestra convidada do Simpósio Engenharia de Superfície do X Encontro da SBPMAT. Realizada no dia 26 de setembro de 2011 em Gramado (RS).
In this presentation on External Thermal Resistance we will look at the thermal resistance of various substrate types, thermal management with printed circuit boards, and examples that compare the thermal resistance of various substrate technologies.
In this presentation on Internal Thermal Resistance of LEDs we will look at the definition and significance of internal thermal resistance in LED packages, the path of heat transfer in some OSRAM LED packages, and the calculation of the junction temperature in LEDs.
In this presentation on Basics of Heat Transfer we will look at the different modes of heat transfer in an LED system, thermal conductivity of typical materials used in LED system design, and the various thermal resistances involved in an LED system.
Thin epitaxial ferromagnetic metal films on GaAs(001) for spin injection and ...François Bianco
A work done at IBM on thin epitaxial ferromagnetic metal films on GaAs(001) for spin injection and tunneling magnetoresistive junctions showing enhanced magnetic anisotropy by annealing.
In this presentation we will look at thermal interface materials, influencing factors for heat sink selection, and steps to identify the right heat sink for an LED system design.
My research involves multiscale modeling, validation and analysis of experimental data to understand complex physical phenomenon in thin film nanoscale energetic materials.
UL Certified Aluminum / Metal Core PCB for LEDs presentation. Featuring highly-respected thermal interface material basics expert Clemens Lasance of Philips Research Laboratories, the thermal management presentation is great for PWB Designers as it provides fabrication notes, material comparisons, and LED product calculators.
In this presentation on Basics of Heat Transfer we will look at the different modes of heat transfer in an LED system, thermal conductivity of typical materials used in LED system design, and the various thermal resistances involved in an LED system.
Thin epitaxial ferromagnetic metal films on GaAs(001) for spin injection and ...François Bianco
A work done at IBM on thin epitaxial ferromagnetic metal films on GaAs(001) for spin injection and tunneling magnetoresistive junctions showing enhanced magnetic anisotropy by annealing.
In this presentation we will look at thermal interface materials, influencing factors for heat sink selection, and steps to identify the right heat sink for an LED system design.
My research involves multiscale modeling, validation and analysis of experimental data to understand complex physical phenomenon in thin film nanoscale energetic materials.
UL Certified Aluminum / Metal Core PCB for LEDs presentation. Featuring highly-respected thermal interface material basics expert Clemens Lasance of Philips Research Laboratories, the thermal management presentation is great for PWB Designers as it provides fabrication notes, material comparisons, and LED product calculators.
Anomalous Behavior Of SSPC In Highly Crystallized Undoped Microcrystalline Si...Sanjay Ram
Microcrystalline silicon is a heterogenous material. We show that different effective DOS distribution can be possible for micro-structurally different μc--Si:H thin films
This lecture describes the spot welding characteristics of aluminium and its alloys, the spot welding process, the choice of process parameters, strength values, electrode life and ?requirements for quality assurance. General engineering background and knowledge in aluminium metallurgy and physical properties, and surface characteristics (e.g. TALAT lecture 5101) is assumed.
SYNTHESIS AND DIELECTRIC CHARACTERIZATION OF BARIUM SUBSTITUTED STRONTIUM BIS...ijrap
The strontium bismuth niobate, SrBi2Nb2O9 (SBN) is a bismuth layered perovskite oxide
compound with potentially useful ferroelectric properties which offer several advantages such as fatigue
free, lead free, low operating voltages, relatively high Curie temperature; and most importantly, their
ferroelectric properties are independent of film thickness. These materials are also important for Fe-RAM
applications having large remanent polarization and low coercivity accompanied by high Curie
temperature for better performance and reliable operation. Present paper describes synthesis, dielectric
properties and impedance studies to reveal the important properties of barium substituted strontium
bismuth niobate, Sr0.85Ba0.15Bi2Nb2O9 in the system Sr1-xBaxBi2Nb2O9(x=0.15).
Synthesis and Dielectric Characterization of Barium Substituted Strontium Bis...ijrap
The strontium bismuth niobate, SrBi2Nb2O9 (SBN) is a bismuth layered perovskite oxide
compound with potentially useful ferroelectric properties which offer several advantages such as fatigue
free, lead free, low operating voltages, relatively high Curie temperature; and most importantly, their
ferroelectric properties are independent of film thickness. These materials are also important for Fe-RAM
applications having large remanent polarization and low coercivity accompanied by high Curie
temperature for better performance and reliable operation. Present paper describes synthesis, dielectric
properties and impedance studies to reveal the important properties of barium substituted strontium
bismuth niobate, Sr0.85Ba0.15Bi2Nb2O9 in the system Sr1-xBaxBi2Nb2O9(x=0.15).
RT/duroid® 6006/6010LM microwave laminates are
ceramic-PTFE composites designed for electronic
and microwave circuit applications requiring a
high dielectric constant. RT/duroid 6006 laminate
is available with a dielectric constant value of 6.15
and RT/duroid 6010LM laminate has a dielectric
constant of 10.2.
Recomendações da OMS sobre cuidados maternos e neonatais para uma experiência pós-natal positiva.
Em consonância com os ODS – Objetivos do Desenvolvimento Sustentável e a Estratégia Global para a Saúde das Mulheres, Crianças e Adolescentes, e aplicando uma abordagem baseada nos direitos humanos, os esforços de cuidados pós-natais devem expandir-se para além da cobertura e da simples sobrevivência, de modo a incluir cuidados de qualidade.
Estas diretrizes visam melhorar a qualidade dos cuidados pós-natais essenciais e de rotina prestados às mulheres e aos recém-nascidos, com o objetivo final de melhorar a saúde e o bem-estar materno e neonatal.
Uma “experiência pós-natal positiva” é um resultado importante para todas as mulheres que dão à luz e para os seus recém-nascidos, estabelecendo as bases para a melhoria da saúde e do bem-estar a curto e longo prazo. Uma experiência pós-natal positiva é definida como aquela em que as mulheres, pessoas que gestam, os recém-nascidos, os casais, os pais, os cuidadores e as famílias recebem informação consistente, garantia e apoio de profissionais de saúde motivados; e onde um sistema de saúde flexível e com recursos reconheça as necessidades das mulheres e dos bebês e respeite o seu contexto cultural.
Estas diretrizes consolidadas apresentam algumas recomendações novas e já bem fundamentadas sobre cuidados pós-natais de rotina para mulheres e neonatos que recebem cuidados no pós-parto em unidades de saúde ou na comunidade, independentemente dos recursos disponíveis.
É fornecido um conjunto abrangente de recomendações para cuidados durante o período puerperal, com ênfase nos cuidados essenciais que todas as mulheres e recém-nascidos devem receber, e com a devida atenção à qualidade dos cuidados; isto é, a entrega e a experiência do cuidado recebido. Estas diretrizes atualizam e ampliam as recomendações da OMS de 2014 sobre cuidados pós-natais da mãe e do recém-nascido e complementam as atuais diretrizes da OMS sobre a gestão de complicações pós-natais.
O estabelecimento da amamentação e o manejo das principais intercorrências é contemplada.
Recomendamos muito.
Vamos discutir essas recomendações no nosso curso de pós-graduação em Aleitamento no Instituto Ciclos.
Esta publicação só está disponível em inglês até o momento.
Prof. Marcus Renato de Carvalho
www.agostodourado.com
Lung Cancer: Artificial Intelligence, Synergetics, Complex System Analysis, S...Oleg Kshivets
RESULTS: Overall life span (LS) was 2252.1±1742.5 days and cumulative 5-year survival (5YS) reached 73.2%, 10 years – 64.8%, 20 years – 42.5%. 513 LCP lived more than 5 years (LS=3124.6±1525.6 days), 148 LCP – more than 10 years (LS=5054.4±1504.1 days).199 LCP died because of LC (LS=562.7±374.5 days). 5YS of LCP after bi/lobectomies was significantly superior in comparison with LCP after pneumonectomies (78.1% vs.63.7%, P=0.00001 by log-rank test). AT significantly improved 5YS (66.3% vs. 34.8%) (P=0.00000 by log-rank test) only for LCP with N1-2. Cox modeling displayed that 5YS of LCP significantly depended on: phase transition (PT) early-invasive LC in terms of synergetics, PT N0—N12, cell ratio factors (ratio between cancer cells- CC and blood cells subpopulations), G1-3, histology, glucose, AT, blood cell circuit, prothrombin index, heparin tolerance, recalcification time (P=0.000-0.038). Neural networks, genetic algorithm selection and bootstrap simulation revealed relationships between 5YS and PT early-invasive LC (rank=1), PT N0—N12 (rank=2), thrombocytes/CC (3), erythrocytes/CC (4), eosinophils/CC (5), healthy cells/CC (6), lymphocytes/CC (7), segmented neutrophils/CC (8), stick neutrophils/CC (9), monocytes/CC (10); leucocytes/CC (11). Correct prediction of 5YS was 100% by neural networks computing (area under ROC curve=1.0; error=0.0).
CONCLUSIONS: 5YS of LCP after radical procedures significantly depended on: 1) PT early-invasive cancer; 2) PT N0--N12; 3) cell ratio factors; 4) blood cell circuit; 5) biochemical factors; 6) hemostasis system; 7) AT; 8) LC characteristics; 9) LC cell dynamics; 10) surgery type: lobectomy/pneumonectomy; 11) anthropometric data. Optimal diagnosis and treatment strategies for LC are: 1) screening and early detection of LC; 2) availability of experienced thoracic surgeons because of complexity of radical procedures; 3) aggressive en block surgery and adequate lymph node dissection for completeness; 4) precise prediction; 5) adjuvant chemoimmunoradiotherapy for LCP with unfavorable prognosis.
The prostate is an exocrine gland of the male mammalian reproductive system
It is a walnut-sized gland that forms part of the male reproductive system and is located in front of the rectum and just below the urinary bladder
Function is to store and secrete a clear, slightly alkaline fluid that constitutes 10-30% of the volume of the seminal fluid that along with the spermatozoa, constitutes semen
A healthy human prostate measures (4cm-vertical, by 3cm-horizontal, 2cm ant-post ).
It surrounds the urethra just below the urinary bladder. It has anterior, median, posterior and two lateral lobes
It’s work is regulated by androgens which are responsible for male sex characteristics
Generalised disease of the prostate due to hormonal derangement which leads to non malignant enlargement of the gland (increase in the number of epithelial cells and stromal tissue)to cause compression of the urethra leading to symptoms (LUTS
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Ve...kevinkariuki227
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
- Video recording of this lecture in English language: https://youtu.be/lK81BzxMqdo
- Video recording of this lecture in Arabic language: https://youtu.be/Ve4P0COk9OI
- Link to download the book free: https://nephrotube.blogspot.com/p/nephrotube-nephrology-books.html
- Link to NephroTube website: www.NephroTube.com
- Link to NephroTube social media accounts: https://nephrotube.blogspot.com/p/join-nephrotube-on-social-media.html
Explore natural remedies for syphilis treatment in Singapore. Discover alternative therapies, herbal remedies, and lifestyle changes that may complement conventional treatments. Learn about holistic approaches to managing syphilis symptoms and supporting overall health.
New Directions in Targeted Therapeutic Approaches for Older Adults With Mantl...i3 Health
i3 Health is pleased to make the speaker slides from this activity available for use as a non-accredited self-study or teaching resource.
This slide deck presented by Dr. Kami Maddocks, Professor-Clinical in the Division of Hematology and
Associate Division Director for Ambulatory Operations
The Ohio State University Comprehensive Cancer Center, will provide insight into new directions in targeted therapeutic approaches for older adults with mantle cell lymphoma.
STATEMENT OF NEED
Mantle cell lymphoma (MCL) is a rare, aggressive B-cell non-Hodgkin lymphoma (NHL) accounting for 5% to 7% of all lymphomas. Its prognosis ranges from indolent disease that does not require treatment for years to very aggressive disease, which is associated with poor survival (Silkenstedt et al, 2021). Typically, MCL is diagnosed at advanced stage and in older patients who cannot tolerate intensive therapy (NCCN, 2022). Although recent advances have slightly increased remission rates, recurrence and relapse remain very common, leading to a median overall survival between 3 and 6 years (LLS, 2021). Though there are several effective options, progress is still needed towards establishing an accepted frontline approach for MCL (Castellino et al, 2022). Treatment selection and management of MCL are complicated by the heterogeneity of prognosis, advanced age and comorbidities of patients, and lack of an established standard approach for treatment, making it vital that clinicians be familiar with the latest research and advances in this area. In this activity chaired by Michael Wang, MD, Professor in the Department of Lymphoma & Myeloma at MD Anderson Cancer Center, expert faculty will discuss prognostic factors informing treatment, the promising results of recent trials in new therapeutic approaches, and the implications of treatment resistance in therapeutic selection for MCL.
Target Audience
Hematology/oncology fellows, attending faculty, and other health care professionals involved in the treatment of patients with mantle cell lymphoma (MCL).
Learning Objectives
1.) Identify clinical and biological prognostic factors that can guide treatment decision making for older adults with MCL
2.) Evaluate emerging data on targeted therapeutic approaches for treatment-naive and relapsed/refractory MCL and their applicability to older adults
3.) Assess mechanisms of resistance to targeted therapies for MCL and their implications for treatment selection
Knee anatomy and clinical tests 2024.pdfvimalpl1234
This includes all relevant anatomy and clinical tests compiled from standard textbooks, Campbell,netter etc..It is comprehensive and best suited for orthopaedicians and orthopaedic residents.
263778731218 Abortion Clinic /Pills In Harare ,sisternakatoto
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These lecture slides, by Dr Sidra Arshad, offer a quick overview of physiological basis of a normal electrocardiogram.
Learning objectives:
1. Define an electrocardiogram (ECG) and electrocardiography
2. Describe how dipoles generated by the heart produce the waveforms of the ECG
3. Describe the components of a normal electrocardiogram of a typical bipolar leads (limb II)
4. Differentiate between intervals and segments
5. Enlist some common indications for obtaining an ECG
Study Resources:
1. Chapter 11, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 9, Human Physiology - From Cells to Systems, Lauralee Sherwood, 9th edition
3. Chapter 29, Ganong’s Review of Medical Physiology, 26th edition
4. Electrocardiogram, StatPearls - https://www.ncbi.nlm.nih.gov/books/NBK549803/
5. ECG in Medical Practice by ABM Abdullah, 4th edition
6. ECG Basics, http://www.nataliescasebook.com/tag/e-c-g-basics
Couples presenting to the infertility clinic- Do they really have infertility...Sujoy Dasgupta
Dr Sujoy Dasgupta presented the study on "Couples presenting to the infertility clinic- Do they really have infertility? – The unexplored stories of non-consummation" in the 13th Congress of the Asia Pacific Initiative on Reproduction (ASPIRE 2024) at Manila on 24 May, 2024.
1. Effect of the Strain from the Substrate on Tunability of
(100) One-axis Oriented (Ba0.5Sr0.5)TiO3 Thin Films*
(Tokyo Institute of Technology )
Shinichi Ito and Hiroshi Funakubo
•i Gennum Corp.•j
Ivoyl Koutsaroff**, Marina Zelner, and Andrew Cerwin-Lawry
(** Presently at Murata Manufacturing Co., Ltd.)
* The experimental work for the present study was completed at TIT during
2004-2005 period
The 16th International Symposium on the Application of Ferroelectrics
XVI ISAF 2007
Nara-Ken New Public Hall, Nara city, Japan
May 27-31, 2007
2. Tunability of (Ba,Sr)TiO3 Film
1000 0.1
100KHz
800 0.08
Relative dielectric constant , εr
Loss tangent, tanδ
Change of Relative 600 0.06
Dielectric Constant
under Electric 400 0.04
Field
200 0.02
Low
Dielectric
Tunability Loss
0 0
-200 0 200
Electric field (kV/cm)
Tunability=[(ƒÃ 0kV/cm – ƒÃ 200kV/cm) / ƒÃ 0kV/cm ] (%)
Applicable for Tunable Capacitance at High Frequency
3. Effect of Stress and/or Strain in the Films
T.M.Shaw et al., Appl. Phys. Let , 75, 2129 (1999) Tensile Strain
Decrease of the Capacitance with Increasing Tensile Strain
Dielectric Constant Strongly Depend on Applied Stress
Importance of Investigation of Effect of Strain on Dielectric
Property of (Ba,Sr)TiO3 Film
4. How to Cheng Stress Applied to Film
Thermal stress From Substrate E
σ th = (α film − α sub. )(Tg − R.T . )
1 −ν
Stress Applied to (Ba,Sr)TiO3 Films
ƒÃ
E•F Young Modulus thermal•F Thermal Strain
Owing to Thermal Expansion Difference ν Poisson Ratio
between Film and Substrate; σth
Change of σth as a function of ƒ¿ sub and Tg.
0.6
Tg=800•Ž Change of σth for the films
0.4 Tg=700•Ž deposited on Si substrate at Tg
Tg=600•Ž of 500•` 800•Ž
Tg=500•Ž
0.2
thermal
Si Change of σth for the films deposited
0 at 800oC on the Substrate with ƒ¿ sub
Al2O3
ƒÃ
of 4.5•` 13.8•~ 10-6/K
-0.2 SrTiO3
MgO Strain of (Ba,Sr)TiO3 film is largely
-0.4
0 2 4 6 8 10 12 14 16 changed by the change of [ƒ¿ sub].
Thermal expansion coefficience of substrate( 10-6/K)
•~
Investigate the Effect of Thermal Strain on Tunability of (Ba,Sr)TiO3Films by
Changing Thermal Expansion Coefficient of Substrate.
5. Importance of Orientation Control of (Ba,Sr)TiO3
Films
Tunability of (100) and (111)-oriented (Ba,Sr)TiO3 Films
C-V Curve Epitaxially Grown One-axis Oriented
Films Films
800 600
100KHz (111) 100KHz
500
Relative dielectric constant , εr
Relative dielectric constant , εr
(111)
600
400
400 300
(100)
(100) 200
200
100
0 0
-1000 -500 0 500 1000 -1500 -1000 -500 0 500 1000 1500
Electric field (kV/cm) Electric field (kV/cm)
Tunability Strong Depend on
Orientation of Films.
Orientation Control is Important to
Check Strain Effect on Tunability
6. Previous Research of Substrate effect
(Ba,Sr)TiO3Films Prepared on Different Substrates
Taylor et al, Appl. Phys. Lett., 80, 1978 (2002)
Insufficient Parts
‡@Composition is not Suitable for
Tunable Capacitance
•¨ Ba/Sr Ratio= 24/76
‡A Orientation was Not Controlled
Orientation was not Controlled
Substrate Dependence of Dielectric Constant
for (Ba,Sr)TiO3 Film Cannot be Estimated.
Use of Single One-axis Oriented Films with Ba/Sr Ratio Giving
High Tunability (50/50 or higher) is Essential for the
Investigation the Effect of Stress on Tunability of BST Films
7. Objectives
To make Clear
Effect of Strain on Tunability of (Ba,Sr)TiO3 Films
1. Preparation of One-axis Oriented (Ba,Sr)TiO3
Films on Substrates with Different Thermal
Expansion Coefficient.
2. Tunability Characterization of Obtained
(Ba,Sr)TiO3 Films
8. Which Orientation is better for Characterization ?
(111)- and (100)-Oriented (Ba,Sr)TiO3 Films
Insulating Characteristics
100 (111) One-axis
Oriented Films
10-1
(111 Epitaxial Films
10-2 Good Insulating Characteristics for
10-3 (100) Oriented Films
Current density (A/cm2)
10-4
(100) Epitaxail Films
10-5
10-6
10-7
Stable Insulating
-8
10 Characteristics of (100)
10-9 (100) One-axis Oriented Films
Oriented Films
10-10
-1000 -800 -600 -400 -200 0 200 400 600 800 1000
Electric field (kV/cm)
Characterize using (100) One-axis Oriented (Ba,Sr)TiO3 Films
10. Experimental Flow
Deposition Preparation•F RF Magnetron Sputtering
Condition of Pressure•F 2.7•~ 101 Pa
(Ba,Sr)TiO3 Films Substrate Temperature •F800oC
Ar/O2 Ratio •F 9.0
Power•F 80 W( 2 inch)
Thickness•F 200nm
Composition•F Ba/Sr=50/50
Preparation of Top Prepare by Photomicrography
Electrode Technique
•i 25µm•~ 25µm•j
Deposition of Pt
Preparation Methods •FRF magnetron Sputtering
Top Electrode
Layer Film Thickness •F 100nm
Post Annealing
500oC-30min •i O2-flow•j
(RTA Furnace)
(3oC/sec)
11. XRD patterns of (Ba,Sr)TiO3 Films Crystal Structure ‡@
110
Phi
200 (Ba,Sr)TiO3
200 MgO
100 (Ba,Sr)TiO3
200c SrRuO3
100c SrRuO3
200c LaNiO3
111 Pt
100c LaNiO3
Psi
Log[Intensity (arb. units)]
on MgO
200 SrTiO3
100 SrTiO3
on SrTiO3
on Al2O3
200 Si on Si
20 25 30 35 40 45 50
2θ, CuKα1 (deg)
Growth of (100) One-axis Oriented (Ba,Sr)TiO3 Films
12. Strain Estimation of (Ba,Sr)TiO3Films Crystal Structure ‡A
Thermal Expansion coefficient ( 10-6/•Ž
•~ )
16 14 12 10 8 6 4 2
2.04 2.3
)
2.02 2.28
d200 [(Ba,Sr)TiO3] (•ð
)
d111 [Pt] (•ð
2 2.26
on MgO on SrTiO
1.98 3 2.24
(Ba,Sr)TiO3 on Al2O3 on Si
(Ba,Sr)TiO3
Substrate Substrate
(Ba,Sr)TiO3
1.96 2.22
Compressive -0.4 -0.2 0 0.2 0.4 0.6 Tensile
ƒÃ thermal (%)
d111 of Pt and d200 of (Ba,Sr)TiO3 Decreased
with Increasing Tensile Stain
In good Agreement with Expectation of Thermal Strain
13. [C-V Characteristics] Tunability (1)
600
100KHz
on MgO
500
Relative dielectric constant , εr
400 on SrTiO3
on Al2O3
300
200
on Si
100
0
-2000 -1500 -1000 -500 0 500 1000 1500 2000
Electric field (kV/cm)
High Electric Field Relative Dielectric Constant was Constant for Films
on all Substrates
0kV/cm Relative Dielectric Constant at 0 kV/cm and Tunability of
BST Films Highly Dependent on Substrate Materials.
14. Thermal Strain Dependence Tunablity (2)
800 100
on MgO on SrTiO
700
Tunability (%) (0-1000kV/cm)
(•œ :0kV/cm, •¡ :1000kV/cm)
3
Relative dielectric contant
on Al2O3 80
600 on Si
500 60
0kV/cm
400
300 40
200
20 (Ba,Sr)TiO3
(Ba,Sr)TiO3
100
Substrate 1000kV/cm Substrate
0 0
Compressive -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 Tensile
ƒÃ thermal (%)
1000kV/cm Relative Dielectric Constant is not Sensitive to Thermal Strain
0kV/cm Relative Dielectric Constant Decreased with Increasing Tensile Strain
Tunability Increased with Increasing Compressive Strain
Relative Dielectric Constant at 0 kV/cm and Tunability of
(Ba,Sr)TiO3 Films Increasing with Compressive Strain.
15. Comparison with Previous reports [Thermal Strain Effect]
T.R.Taylor, Appl. Phys. Let , 80, 1978 (2002)
800
@0 kV/cm
700
Relative dielectric constant
(100)(Ba,Sr)TiO3/(100)cSrRuO3/(100)cLaNiO3/Pt
600 Substrate Temperature •F 800•Ž
500
400
300
200 (Ba,Sr)TiO3/Pt (Ba/Srӊ =24/76)
(Ba,Sr)TiO3 Substrate Temperature : 600•Ž (Ba,Sr)TiO3
100
Substrate Substrate
0
Compressive -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 Tensile
ƒÃ thermal (%)
Relative Dielectric Constant Increased with
Compressive Strain.
Crystallinity was
Controlled
Relative Dielectric Constant Change against
Thermal Strain was Large in Case of the Film Composition Gave
Present Research.
Much Higher Tunability
16. Comparison with Literature
Effect of External Stress Allied to (Ba,Sr)TiO3 Films on Tunability
Tensile Strain Decrease of Capacitance
with Tensile Strain
Decrees of Dielectric
Constant Due to Inverse
T.M.Shaw, Appl. Phys. Let , 75, 2129 (1999)
Electro strict Effect
1.1
on MgO
1
Normalized capacitance
Remained Thermal Strain on SrTiO3
0.9
E
σ th = (α film − α sub. )(Tg − R.T . )
1 −ν 0.8 on Al2O3
E•F Young Modulus ƒÃ thermal•FThermal 0.7 In Good
ν Poisson Ratio Strai
Agreement
0.6 on Si
* Bulk Value 0.5
E = 200 GPa 0 500 1000 1500
ν = 0.23 Difference of Tensile stress against MgO substrate(MPa)
K.Morito J. Appl. Phys., 97, 104107-1 (2005) Dielectric Constant Change With
Inverse Erectro strict Effect
17. Summary
1. (100) Oriented (Ba,Sr)TiO3 Films were
Successfully Preparation on Substrates with
Different Thermal Expansion Coefficient.
2. Relative Dielectric Constant at 0 kV/cm and
Tunability of (Ba,Sr)TiO3 Films Increased with
Compressive Strain.