Anomalous Hall Resistivity of TbBaCo2O5.53 with Non-trivial Magnetic Structure

Details Anomalous Hall Resistivity of TbBaCo2O5.53 with Non-trivial Magnetic Structure Anomalous Hall Resistivity of TbBaCo2O5.53 with Non-trivial Magnetic Structure

2006-08-08

arxiv.org/abs/cond-mat/0608185v1

J. Phys. Soc. Jpn. 75 (2006) 114710.

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 11 figures, submitted to J. Phys. Soc. Jpn

Scientific paper

10.1143/JPSJ.75.114710

To investigate the Hall resistivity rH of systems with non-trivial spin structures, transport and magnetic properties of the oxygen deficient perovskite system TbBaCo2O5.53 with non-trivial magnetic structures have been adopted. As has been already known, the system exhibits, with decreasing temperature T, a transition to a ferromagnetic (FM) phase with non-collinear magnetic structure at TC 280 K in zero magnetic field and with further decreasing T, the spontaneous magnetization begins to decrease at T1~260 K and becomes zero at TN 245 K, where an antiferromagnetic (AFM) phase with non-collinear magnetic structure is realized. The metamagnetic behavior is induced by the relatively small magnetic field H (< 5 T) in the T region between ~200 K and T1. In this T region, unusual H dependence of rH has been observed. By analyzing the observed rH and magnetization M, the H dependence of the anomalous Hall coefficients Rs has been obtained at various fixed temperatures. Based on the magnetic structure reported previously by our group, the possible relevance of the non-trivial magnetic structure to the observed unusual behavior of rH is pointed out.

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