Reentrant superconductivity in URhGe
Reentrant superconductivity in URhGe
复制标题
URhGe 中的重入超导
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
V. Mineev
中科院分区：
文献类型：
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作者：
V. Mineev
提出了一种铁磁体超导体超磁锗相图的现象学描述。在朗道现象学的框架下，发现在垂直于易磁化方向的足够强的磁场下，各向异性铁磁态和顺磁态之间的相变由二阶转变为一阶。结果表明，在刺激超导态重入的一阶跃迁附近，纵向磁波动对应的磁化率显著增加。
There is presented a phenomenological description of phase diagram of ferromagnet superconductor URhGe. In frame of the Landau phenomenological theory it was found that phase transition between anisotropic ferromagnetic and paramagnetic states under strong enough magnetic field perpendicular to direction of easy magnetization changes from the second to the first order type. It is shown that magnetic susceptibility corresponding to longitudinal magnetic fluctuations strongly increases in vicinity of the first order transition stimulating reentrance of superconducting state.
The reentrant superconductivity observed near the first order transition line at temperatures about twice lower than the tricritical point temperature exists both in ferromagnet and paramagnet state. The critical temperature of transition to superconducting state falls down at intersection with line of ferromagnet-paramagnet phase transition.