Multiple magnetic transitions in SmCoAsO
Multiple magnetic transitions in SmCoAsO
复制标题
DOI：
10.1063/1.3660768
复制
发表时间：
2011-11
期刊：
影响因子：
1.6
通讯作者：
Yongliang Chen;Y. Cui;Cuihua Cheng;Yong Zhao
中科院分区：
文献类型：
--
作者：
Yongliang Chen;Y. Cui;Cuihua Cheng;Yong Zhao
研究了SmCoAsO的磁性。我们的结果与早期的观察结果不同。复杂的磁性包括反铁磁、铁磁、亚铁磁和顺磁，甚至在低场下还观察到了抗磁现象。由于自旋的倾斜，观察到了超磁转变。具有倾斜结构的两个Co亚晶格之间的相互作用可能是导致多个磁相变的原因。电阻率数据表明，SmCoAsO是室温电阻率为0.51669 mΩ-cm的金属导体。负磁电阻效应表明外加磁场显著抑制了自旋反转散射。建立了磁相图。
The magnetic properties of SmCoAsO have been investigated. Our results differ from early observations. Complicated magnetism consists of antiferromagnetic, ferromagnetic, ferrimagnetic and paramagnetic, even diamagnetism at low field has been observed. A metamagnetic transition was observed, resulting from a canting of the spins. The interaction between two Co sublattices with canted-structure might take responsibility for the multiple magnetic transitions. Electrical resistivity data indicate that SmCoAsO is metallic conductor with room temperature resistivity of 0.51669 mΩ-cm. Negative magnetoresistance effect suggests a significant suppression of spin-flip scattering by the applied magnetic field. The magnetic phase diagram has been established.