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Angular variation of the magnetoresistance of the superconducting ferromagnet UCoGe

机译:超导铁磁体UCoGe的磁阻角变化

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摘要

We report a magnetoresistance study of the superconducting ferromagnet UCoGe. The data, taken on single-crystalline samples, show a pronounced structure at B~* = 8.5 T for a field applied along the ordered moment m_0. Angle-dependent measurements reveal that this field-induced phenomenon has an uniaxial anisotropy. Magnetoresistance measurements under pressure show a rapid increase of B~* to 12.8 T at 1.0 GPa. We discuss B~* in terms of a field-induced polarization change. Upper critical field measurements corroborate the unusual S-shaped B_(c2)(T) curve for a field along the b axis of the orthorhombic unit cell.
机译:我们报告了超导铁磁体UCoGe的磁阻研究。在单晶样品上获得的数据表明,在沿有序矩m_0施加的磁场中,B〜* = 8.5 T处具有明显的结构。角度相关的测量结果表明,这种场感应现象具有单轴各向异性。压力下的磁阻测量表明,在1.0 GPa下,B〜*迅速增加至12.8T。我们根据场致极化变化来讨论B〜*。上临界场测量结果证实了正交晶胞的b轴场的异常S形B_(c2)(T)曲线。

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