Specific heat investigation of the magnetic ordering in two frustrated spin-chain oxides: Ca3Co2O6 and Ca3CoRhO6
Specific heat investigation of the magnetic ordering in two frustrated spin-chain oxides: Ca3Co2O6 and Ca3CoRhO6
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DOI：
10.1088/0953-8984/15/33/307
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发表时间：
2003-07
期刊：
影响因子：
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通讯作者：
V. Hardy;M R Lees;A. Maignan;Sylvie Hébert;Delphine Flahaut;C. Martin;D. Paul
中科院分区：
文献类型：
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作者：
V. Hardy;M R Lees;A. Maignan;Sylvie Hébert;Delphine Flahaut;C. Martin;D. Paul
比热测量进行了密切相关的自旋链氧化物Ca3Co2O6和Ca3CoRhO6。这两种化合物都由排列在三角形晶格上的伊辛磁链组成。自旋耦合沿着和链之间是铁磁和反铁磁，分别。这些磁性特征的组合预期会产生几何挫折。目前的研究报告，这些化合物的比热数据表现出相似的自旋冻结过程在低T，而显着的差异存在于反铁磁链间有序在较高的T。这些结果与以前的磁化和中子衍射数据进行了讨论。
Specific heat measurements were carried out on the closely related spin-chain oxides Ca3Co2O6 and Ca3CoRhO6. Both compounds consist of Ising magnetic chains that are arranged on a triangular lattice. The spin coupling along and between the chains is ferromagnetic and antiferromagnetic, respectively. Geometrical frustration is expected from the combination of these magnetic features. The present study reports that the specific heat data of these compounds exhibit similarities in the spin-freezing process at low T, whereas striking differences exist in the antiferromagnetic interchain ordering at higher T. These results are discussed in connection with previous magnetization and neutron diffraction data.