Superconductivity of Materials (student preso)

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general physics
28 nov 2009

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Superconductivity of Materials (student preso)

  1. 1. Superconductivity of Materials Napat, Peerada, Chaloempol
  2. 2. Type l superconductors <ul><li>Including thirty pure metals </li></ul><ul><li>Zero resistivity below a critical temperature </li></ul><ul><li>Characterized as soft superconductors </li></ul><ul><li>Has the ability to exclude </li></ul><ul><li>magnetic field from its interior in superconducting state :The Meissner Effect </li></ul>
  3. 3. The Meissner Effect <ul><li>Become perfect diamagnet: repelled by magnetic field </li></ul>
  4. 4. Type II Conductor <ul><li>Material: metal alloys, complex oxide ceramic </li></ul><ul><li>higher critical fields and therefore could carry much higher current densities while remaining in the superconducting state </li></ul>
  5. 5. Critical Magnetic field <ul><li>Mixed superconducting (vortex state) </li></ul><ul><li>Normal state </li></ul><ul><li>Superconducting state </li></ul>
  6. 6. Niobium-Titanium Superconductor <ul><li>a critical temperature of 10 K and a critical magnetic field of 15 Tesla . </li></ul><ul><li>fine filaments are advantageous because current flows only within a skin - depth of the surface of a superconductor </li></ul>
  7. 7. Task <ul><li>Napat: Type I conductor </li></ul><ul><li>Peerada: Type II conductor </li></ul><ul><li>Chaloempol: Introduction </li></ul>
  8. 8. References <ul><li>http :// hyperphysics . phy - astr . gsu . edu / hbase / solids / scbc . html#c4 </li></ul><ul><li>http://en.wikipedia.org/wiki/Technological_applications_of_superconductivity </li></ul><ul><li>http://www.howstuffworks.com/question610.htm </li></ul><ul><li>http://www.universetoday.com/2008/09/20/helium-leak-forces-lhc-shutdown-for-at-least-two-months/ </li></ul><ul><li>http :// hyperphysics.phy - astr.gsu.edu / hbase / solids /meis.html#c1 </li></ul><ul><li>http :// www.physics.ubc.ca /~ outreach/ phys420/p420_96/ bruce / meissner.html </li></ul><ul><li>http://images.google.co.th/imgres?imgurl=http://www.rise.org.au/info/Tech/scon/image001.jpg&imgrefurl=http://www.rise.org.au/info/Tech/scon/index.html&usg=__O-qgctMchJ-ynhBP4iDsEwu9S70=&h=496&w=650&sz=40&hl=th&start=30&um=1&tbnid=g2cRrjP-4QpBPM:&tbnh=105&tbnw=137&prev=/images%3Fq%3Dtype%2B1%2Bsuperconductors%26ndsp%3D18%26hl%3Dth%26sa%3DN%26start%3D18%26um%3D1 </li></ul>

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