Abstract

Magnetic phase transition in Fe₄₉Rh₅₁ was studied using wide-field Kerr microscopy. In zero magnetic field, temperature dependences of rotation of polarization plane on the sample surface are obtained. The analysis of the obtained data shows that the temperature of the AFM–FM phase transition is T_{N, heat} = 323.5 K, and that of the reverse FM–AFM phase transition is T_{N, cool} = 317 K. In a magnetic field of 0.5 T, the temperature hysteresis shifts to lower temperatures by 4 K. For the first time ever, the magnetic polar domains with a disordered labyrinthine shape are found on the sample surface.

中文翻译：

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Fe49Rh51磁相变的克尔显微镜研究

摘要

使用宽场克尔显微镜研究了 Fe ₄₉ Rh ₅₁中的磁相变。在零磁场下，获得了样品表面上偏振面旋转的温度依赖性。对所得数据的分析表明，AFM-FM 相变的温度为T _N，热= 323.5 K，而 FM-AFM 反向相变的温度为T _N，cool = 317 K。 0.5 T，温度滞后移动到较低的温度 4 K。有史以来第一次，在样品表面上发现了具有无序迷宫形状的磁极域。