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Pressure-induced itinerant electron metamagnetism in UCo0.995Os0.005Al ferromagnet

机译:UCO0.995OS0.005AL Ferromagnet中的压力诱导的溜射电子元磁性

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摘要

The effect of external hydrostatic pressure on magnetic properties is studied for the UCo0.995Os0.005Al single crystal. At ambient pressure, the ground state is ferromagnetic. Even lowest applied pressure 0.11 GPa is sufficient to suppress ferromagnetism. A sharp metamagnetic transition is observed only in magnetic fields along the c axis of the crystal, similar to previously studied itinerant electron metamagnet UCoAl. Temperature dependence of the susceptibility for various pressures shows a broad maximum at T-max similar to 20 K. The experimental data are analyzed with the theory of itinerant electron metamagnetism, which considers anisotropic thermal fluctuations of the uranium magnetic moment. The observed pressure dependence of the susceptibility at Tmax and the temperature for the disappearance of the first-order metamagnetic transition are explained with the theory.
机译:研究了UCO0.995OS0.005AL单晶的外静压压力对磁性的影响。 在环境压力下,地面是铁磁性的。 即使是最低施加的压力0.11GPa也足以抑制铁磁体。 仅在沿晶体的C轴的磁场中观察到尖锐的元磁转变,类似于先前研究的潮断电子元元Ucoal。 各种压力易感性的温度依赖性显示出与20K类似的T-Max的宽最大值。通过腾腾电子元磁性的理论分析实验数据,这考虑了铀磁矩的各向异性热波动。 在理论上解释了Tmax易感性的观察到敏感性的压力依赖性和对一阶元磁跃转变消失的温度。

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