Multiple magnetic transitions in SmCoAsO

作者：Chen Yongliang; Cui Yajing; Cheng Cuihua; Zhao Yong^*

来源：AIP Advances, 2011, 1(4): 042134.

DOI：10.1063/1.3660768

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 m Omega-cm. Negative magnetoresistance effect suggests a significant suppression of spin-flip scattering by the applied magnetic field. The magnetic phase diagram has been established.

• 出版日期2011-12
• 单位西南交通大学