Direct measurement of magnetization isotherms of Fe64Ni36 Invar alloy in a diamond anvil cell |
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| Authors: | J. Kamarád M. Míšek Z. Arnold |
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| Affiliation: | 1. Institute of Physics AS CR v.v.i., Na Slovance 2, 182 21, Prague 8, Czech Republic;2. Department of Magnetics and Superconductors, Institute of Physics AS CR, v.v.i., Cukrovarnická 10, 162 53 Praha 6, Czech Republickamarad@fzu.cz |
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| Abstract: | Magnetization isotherms of the Fe64Ni36 Invar alloy have been measured under pressure up to 5.3?GPa in magnetic field up to 5?T using a diamond anvil cell and SQUID magnetometer. The unambiguous change of the pressure parameter dlnMS/dP (from ?9 to ?13×10?2?GPa?1) has been observed in a narrow pressure interval from 2.5 to 3.5?GPa at all temperatures in the range from 5 to 300?K. The pressure interval, where the sharp decrease in magnetization was observed, coincides with the critical pressures of the pressure-induced decrease in Fe-moment that were determined by the X-ray Magnetic Circular Dichroism and the X-ray Emission Spectra studies, recently. The pronounced decrease in the Curie temperature of the Fe64Ni36 alloy under pressure, dTC/dP = ?44 ±2?K/GPa, has been confirmed. |
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| Keywords: | Invar magnetization DAC pressure |
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