Fermi Surface Properties of Ferromagnet UCu 2_Si_2
Fermi Surface Properties of Ferromagnet UCu 2_Si_2
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铁磁体UCu 2_Si_2的费米表面性质
DOI：
10.1143/jpsj.79.114712
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
Y. Onuki
中科院分区：
文献类型：
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作者：
T. D. Matsuda;S. Ikeda;E. Yamamoto;Y. Haga;H. Shishido;H. Yamagami;R. Settai;Y. Onuki
我们用Sn助熔剂法成功地生长出了具有四方晶系结构的UCu_2Si_2单晶，并测量了其de Haas-van Alphen效应。UCu_2Si_2在TN =106 K以下为反铁磁有序，在TC =100 K时为连续铁磁有序。在铁磁态下观察到多个de Haas-van Alphen分支，范围为5× 106 ~ 7× 107 Oe。相应的回旋有效质量为1.4 ~ 4.2m0，与电子比热系数γ=20 mJ/（K2·mol）相一致。这些实验结果近似解释的5 f-巡回自旋和轨道极化能带模型。
We have succeeded in growing a high-quality single crystal of UCu2Si2with a tetragonal structure by the Sn-flux method and measured the de Haas–van Alphen effect. UCu2Si2orders antiferromagnetically belowTN=106 K and follows a successive ferromagnetic ordering atTC=100 K. Several de Haas–van Alphen branches are observed in the ferromagnetic state, ranging from 5×106to 7×107Oe. The corresponding cyclotron effective masses are moderately large, ranging from 1.4 to 4.2m0, consistent with the electronic specific heat coefficient γ=20 mJ/(K2·mol). These experimental results are approximately explained by the 5f-itinerant spin- and orbital-polarized energy band model.