Direct measurement of magnetization isotherms of Fe64Ni36 Invar alloy in a diamond anvil cell
Direct measurement of magnetization isotherms of Fe64Ni36 Invar alloy in a diamond anvil cell
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金刚石砧池中 Fe64Ni36 Invar 合金磁化等温线的直接测量
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
Z. Arnold
中科院分区：
文献类型：
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作者：
J. Kamarád;M. Míšek;Z. Arnold
用金刚石压砧和SQUID磁强计测量了Fe 64 Ni 36因瓦合金在5.3GPa压力和5 T磁场下的磁化等温线。 压力参数dlnMS/dP（从-9到-13 ×10 - 2 GPa-1）的明确变化在5到300 K的所有温度范围内，在2.5到3.5 GPa的狭窄压力区间内都被观察到。 磁化强度急剧下降的压力区间与最近由X射线磁圆二色性和X射线发射光谱研究确定的压力诱导Fe磁矩下降的临界压力相一致。在压力下，Fe 64 Ni 36合金的居里温度显著降低，dTC/dP = −44 ±2 K/GPa，已经得到证实。
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.