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Anisotropic thermal expansion and evaluation of uniaxial pressure dependence of superconducting and magnetic transitions in ErNi2B2C

机译:ErNi2B2C的各向异性热膨胀及超导和磁跃迁的单轴压力依赖性评估

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摘要

We present anisotropic thermal expansion measurements on single crystalline ErNi2B2C. All three, superconducting, antiferromagnetic and weak ferromagnetic phase transitions are unambiguously distinguished in the data. Anisotropic uniaxial pressure dependencies of the transitions are estimated based on the Ehrenfest relation, leading to a conclusion, in particular, that weak ferromagnetic states may be suppressed by small, order of few kbar, hydrostatic pressure. Additionally, magnetostriction is shown to be a useful probe for rich and complex H-T diagram in this material. (c) 2006 Elsevier Ltd. All rights reserved.
机译:我们提出了对单晶ErNi2B2C的各向异性热膨胀测量。数据中明确区分了超导,反铁磁和弱铁磁这三种相变。基于埃伦菲斯特(Ehrenfest)关系估计了转变的各向异性单轴压力依赖性,特别是得出的结论是,弱的铁磁态可以通过小到几千kbar的静水压力来抑制。此外,磁致伸缩被证明是该材料中丰富而复杂的H-T图的有用探针。 (c)2006 Elsevier Ltd.保留所有权利。

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