Anomalous hall effect and magnetoresistance of SrFe1-xCoxO3-δ

被引:8
作者
Ido, T [1 ]
Yasui, Y [1 ]
Sato, M [1 ]
机构
[1] Nagoya Univ, Dept Phys, Div Mat Sci, Chikusa Ku, Nagoya, Aichi 4648602, Japan
关键词
SrFe1-xCoxO3-delta; anomalous Hall resistivity; spin chiral order; reentrant spin glass; magnetoresistance;
D O I
10.1143/JPSJ.72.357
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Transport and magnetic studies on polycrystalline samples of SrFe1-xCoxO3-delta have been carried out to investigate the relationship between the magnetic structure and the anomalous Hall resistivity rhoH. The hysteretic behavior of the magnetization observed in the measurements with varying temperature T up and then down after zero field cooling indicates that the system has the reentrant spin-glass phase, which is supported by the increasing width of the magnetic reflections observed by neutron diffraction with decreasing T below the Curie temperature T-C. Detailed analyses of the observed Hall resistivity rhoH indicate that the anomalous Hall coefficient exhibits unusual behavior in the reentrant spin-glass phase. The magnetic field (H)- and T-dependence of the magnetoresistance of the present system can be understood by a spin dependent tunneling model.
引用
收藏
页码:357 / 363
页数:7
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