Deuteration-induced ferromagnetic metallic properties in R7Rh3Dx (R = Tb, Dy)
Deuteration-induced ferromagnetic metallic properties in R7Rh3Dx (R = Tb, Dy)
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R7Rh3Dx 中氘化引起的铁磁金属特性（R = Tb、Dy）
DOI：
10.3938/jkps.63.367
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发表时间：
2013
影响因子：
0.6
通讯作者：
R. Sato
中科院分区：
文献类型：
--
作者：
K. Shimomura;T. Tsutaoka;S. Filipek;R. Sato
通过测量R_7Rh_3氘化物Tb_7Rh_3D_（27）和Dy_7Rh_3D_（27）的磁化强度、磁化率和电阻率，研究了它们的磁性和电学性质。Tb 7 Rh 3D 27和Dy 7 Rh 3D 27分别在低于TC = 62 K和23.5 K时显示铁磁性质;金属态由氘化诱导。这些化合物中的氘代诱导的磁性转变可以通过层间和层内交换相互作用之间的竞争来实现。氘化诱导的半金属到金属的转变可以归因于由于位于间隙位置的质子和/或源自氘解离的额外电子而由晶格膨胀产生的能带结构的修改。
The magnetic and the electrical properties of the R7Rh3 deuterides Tb7Rh3D27 and Dy7Rh3D27 have been studied by measuring the magnetization, magnetic susceptibility and electrical resistivity. Tb7Rh3D27 and Dy7Rh3D27 show a ferromagnetic property below TC = 62 K and 23.5 K, respectively; a metallic state is induced by deuteration. The deuteration-induced magnetic transition in these compounds can be realized by a competition between the inter- and intra-layer exchange interactions. The deuteration-induced semimetal to metal transition can be attributed to a modification of the energy band structure produced by a lattice expansion due to protons located in the interstitial positions and/or additional electrons originating from the dissociation of deuterium.