Anisotropy and metamagnetism in the RNi2Ge2 (R = Y, La-Nd, Sm-Lu) series
Anisotropy and metamagnetism in the RNi2Ge2 (R = Y, La-Nd, Sm-Lu) series
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DOI：
10.1016/s0304-8853(99)00486-2
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发表时间：
1999-10-01
影响因子：
2.7
通讯作者：
Canfield, PC
中科院分区：
文献类型：
--
作者：
Bud'ko, SL;Islam, Z;Canfield, PC
生长了RNi_2Ge_2（R = Y，La-Nd，Sm-Lu）三元金属间化合物单晶，并通过测量零磁场和外加磁场下的各向异性磁化强度和面内电阻率对其进行了表征。该系列的大多数力矩轴承成员反铁磁顺序，并有一系列的过渡在零施加磁场和有一个粗略的de Gennes标度的θ（D）和T-N的重稀土系列的成员。的磁有序状态和零场的磁转变的变磁转变的签名观察到的一系列成员的数量。对TbNi_2Ge_2进行了详细的研究。依赖于角度的磁化测量支持的假设，在有序状态的自旋被限制在c轴。通过测量不同温度（M（H））和外加磁场（M（T））下的磁化强度，得到了该材料的复H-T（H平行于c）相图。TbNi_2Ge_2是一种很有前途的“魔鬼楼梯”材料。此外，YbNi 2Ge 2被认为具有很强的4f-导电电子杂化，其特征在于作为一个4f-孔模拟先前研究的CeNi 2Ge 2中等重费米子化合物。(C)1999 Elsevier Science B. V.保留所有权利。
Single crystals of a complete series of the RNi2Ge2 (R = Y, La-Nd, Sm-Lu) ternary intermetallics were grown and characterized by measurements of the anisotropic magnetization and in-plane resistivity in zero and applied magnetic field. The majority of moment-bearing members of the series order antiferromagnetically and have a series of transitions in zero applied magnetic field and there is a rough de Gennes scaling of Theta(D) and T-N for the heavy rare-earth members of the series. Signatures of the metamagnetic transitions in the magnetically ordered state and magnetic transitions in zero field are observed for a number of the members of the series. TbNi2Ge2 was studied in more details. Angular-dependent magnetization measurements support the hypothesis that the spins in the ordered states are confined to the c-axis. Complex H-T (H parallel to c) phase diagram for this material was derived from the magnetization measurements at different temperatures (M(H)) and applied fields (M(T)). It is suggested that TbNi2Ge2 is a promising candidate for the 'devil's staircase' material. In addition, YbNi2Ge2 is suggested to have strong 4f-conduction electron hybridization and is characterized as a 4f-hole analog of the previously studied CeNi2Ge2 moderate heavy fermion compound. (C) 1999 Elsevier Science B.V. All rights reserved.