The Curie temperature of the Cubic Laves material, TbNi2Mn, has been investigated through ambient pressure specific heat and magnetization, as well as high pressure AC magnetic susceptibility. The results show a pressure-independent spin reorientation below Tc, and a Curie temperature decrease of -1.96 K/GPa.

1. Pressure Dependance of the Curie temperature of TbNi 2 Mn, Investigated Using Designer Diamond Anvils Damon D Jackson Scott K McCall Sam T Weir Lawrence Livermore Nat’l Lab Wei Qiu Yogesh K. Vohra Univ. Alabama, Birmingham Dave P Young Louisiana State University UCRL-PRES-228374 ; This work was performed under the auspices of the U.S. Department of Energy by University of California, Lawrence Livermore National Laboratory under Contract W-7405-Eng-48.

2. Pressure Dependance of the Curie temperature of TbNi 2 Mn, Investigated Using Designer Diamond Anvils Wei Qiu Yogesh K. Vohra Univ. Alabama, Birmingham Damon D Jackson Scott K McCall Sam T Weir Lawrence Livermore Nat’l Lab Dave P Young Louisiana State University UCRL-PRES-228374 ; This work was performed under the auspices of the U.S. Department of Energy by University of California, Lawrence Livermore National Laboratory under Contract W-7405-Eng-48.

7. Compounds for Comparison: TbMn 2

23. Conventional Magnetic Susceptibility with a DAC T. Timofeev, et al., Fizika I Tekhnika Vysokikh Davlenii, 16 , 15 (1984) low sensitivity low signal to noise

24. Magnetic Susceptibility with Designer Diamond Anvils • χ ac experiments are difficult because magnetic field decreases as 1 /r 3 • Using Designer Diamond Anvils, “filling factor” is drastically increased due to embedded microloops • 10-turn pick-up coil • coil lines are 5 µm wide and 0.35 µm thick • mechanically robust • high signal-to-noise sensitivity (10 -2 emu/cm 3 ) • no need for a compensation coil

25. Multiloop Designer Anvil Fabrication Lithographic Fabrication Diamond Encapsulation Diamond Polishing (reflected light) Completed Anvil (transmitted light)