Anomalous Hall Effect and Magnetoresistance of SrFe1-xCoxO3-d

Details Anomalous Hall Effect and Magnetoresistance of SrFe1-xCoxO3-d Anomalous Hall Effect and Magnetoresistance of SrFe1-xCoxO3-d

2003-02-21

arxiv.org/abs/cond-mat/0302436v1

Physics

Condensed Matter

Strongly Correlated Electrons

10 pages, 11 figures, J. Phys. Soc. Jpn. 72 (2003) No.2

Scientific paper

10.1143/JPSJ.72.357

Transport and magnetic studies on polycrystalline samples of SrFe1-xCoxO3-d have been carried out to investigate the relationship between the magnetic structure and the anomalous Hall resistivity rH. 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 TC. Detailed analyses of the observed Hall resistivity rH 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.

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