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首页> 外文期刊>Physical review >Effects of Tm substitution on superconductivity and magnetism in the antiferromagnetic borocarbide superconductor Dy_(1-x)Tm_xNi_2B_2C
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Effects of Tm substitution on superconductivity and magnetism in the antiferromagnetic borocarbide superconductor Dy_(1-x)Tm_xNi_2B_2C

机译：Tm置换对反铁磁硼碳化物超导体Dy_（1-x）Tm_xNi_2B_2C中超导和磁性的影响

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摘要

A series of single-phased Dy_(1-x)Tm_xNi_2B_2C (x=0-1) compounds were prepared by an arc-melting method. The superconductivity and magnetic properties have been investigated by measuring electrical resistivity, magnetization, and specific heat. The superconducting transition temperature T_c decreases rapidly with increasing x, and shows a minimum around x=0.15, then increases gradually with a further increase in x. The magnetic transition temperature T_M gradually decreases with increasing x. The effective magnetic moment μeff gradually decreases with increasing x and agrees with the estimation assuming the free ion values of Dy~(3+) and Tm~(3+) states, indicating that the change in the electronic structure of Dy and Tm ions is very small. The present results together with previously reported Dy_(1-x)Tm_xNi_2B_2C (R=Ho, Tb, Y, and Lu) systems were discussed and well explained in the frame of Abrikosov and Gor'kov theory and the field cancellation effect at Ni sites.
机译：通过电弧熔融法制备了一系列单相的Dy_（1-x）Tm_xNi_2B_2C（x = 0-1）化合物。通过测量电阻率，磁化强度和比热，已经研究了超导性和磁性。超导转变温度T_c随着x的增加而迅速降低，并在x = 0.15附近显示出最小值，然后随着x的进一步增加而逐渐升高。磁性转变温度T_M随着x的增加而逐渐降低。有效磁矩μeff随着x的增加而逐渐减小，并且与假定Dy〜（3+）和Tm〜（3+）态的自由离子值的估计相符，这表明Dy和Tm离子的电子结构变化为很小。在Abrikosov和Gor'kov理论的框架内以及在Ni场处的场抵消效应中讨论并很好地解释了目前的结果以及先前报道的Dy_（1-x）Tm_xNi_2B_2C（R = Ho，Tb，Y和Lu）系统。

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  • 来源
    《Physical review》 |2010年第21期|P.214517.1-214517.6|共6页
  • 作者

    Lingwei Li; Katsuhiko Nishimura; Masakazu Fujii; Kenji Matsuda; Dexuan Huo;

  • 作者单位

    Institute of Materials Physics, Hangzhou Dianzi University, Hangzhou 310018, China Graduate School of Science and Engineering, University of Toyama, Toyama 930-8555, Japan;

    rnGraduate School of Science and Engineering, University of Toyama, Toyama 930-8555, Japan;

    rnGraduate School of Science and Engineering, University of Toyama, Toyama 930-8555, Japan;

    rnGraduate School of Science and Engineering, University of Toyama, Toyama 930-8555, Japan;

    rnInstitute of Materials Physics, Hangzhou Dianzi University, Hangzhou 310018, China;

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  • 正文语种 eng
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  • 关键词

    superconductivity phase diagrams; effects of crystal defects, doping and substitution;

    机译：超导相图;晶体缺陷;掺杂和取代的影响;

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