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Anisotropy of Magnetic and Transport Properties of UAuSb_2 Single Crystals

机译:UAuSb_2单晶的磁性和输运性质的各向异性

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摘要

The uranium-gold diantimonide UAuSb_2 belongs to a numerous family of ternary compounds crystallizing in a tetragonal structure of the HfCuSi_2-type (space group P4mm). In this paper the results of magnetization, electrical resistivity and thermopower measured along the main crystallographic directions are reported. Two magnetic transitions, a ferromagnetic one at T_C = 31 K and probably an antiferromagnetic one at T_N = 43 K were found. The spontaneous magnetization at 1.9 K amounts about 0.8 μ_B for B ‖ c-axis. Electrical resistivity for j ⊥ c-axis exhibits a T~2 exp(-△/kT) dependence at low temperatures and a Kondo effect at higher temperatures above T_N. The thermopower S for both main crystallographic directions shows a maximum at the temperature close to Tc and the lack of any anomaly at T_N.
机译:铀金二锑化物UAuSb_2属于许多三元化合物家族,它们以HfCuSi_2型(空间群P4 / nmm)的四边形结构结晶。本文报道了沿主要晶体学方向测得的磁化,电阻率和热功率的结果。发现了两个磁跃迁,在T_C = 31 K时为铁磁跃迁,在T_N = 43 K时可能为反铁磁跃迁。对于B′c轴,在1.9 K时的自发磁化量约为0.8μ_B。 j⊥c轴的电阻率在低温下表现出T〜2 exp(-△/ kT)依赖性,而在高于T_N的高温下表现出近藤效应。两个主要晶体学方向的热功率S在接近Tc的温度下显示最大值,并且在T_N处没有任何异常。

著录项

  • 来源
    《Acta physica polonica A》|2008年|181-184|共4页
  • 会议地点 Poznan(PL);Poznan(PL)
  • 作者单位

    Institute of Low Temperature and Structure Research, Polish Academy of Sciences P.O. Box 1410, 50-950 Wroclaw 2, Poland;

    Institute of Low Temperature and Structure Research, Polish Academy of Sciences P.O. Box 1410, 50-950 Wroclaw 2, Poland Laboratory for Solid State Physics, ETH Zuerich, Switzerland;

    Institute of Low Temperature and Structure Research, Polish Academy of Sciences P.O. Box 1410, 50-950 Wroclaw 2, Poland;

    Institute of Low Temperature and Structure Research, Polish Academy of Sciences P.O. Box 1410, 50-950 Wroclaw 2, Poland;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 物理学;
  • 关键词

    intermetallic compounds; strongly correlated electron systems; heavy fermions; magnetic anisotropy;

    机译:金属间化合物强相关电子系统;重费米子磁各向异性;

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