Various physical properties of the pyrochlore oxide Y2-xBixIr2O7 have been studied. The magnetizations M measured under the conditions of the zero-field-cooling(ZFC) and the field-cooling(FC) have different values below the temperature T=TG. The anomalous T-dependence of the electrical resistivities r and the thermoelectric powers S observed at around TG indicates that the behavior of the magnetization is due to the transition to the state with the spin freezing. In this spin-frozen state, the Hall resistivities rH measured with the ZFC and FC conditions are found to have different values, too, in the low temperature phase (T<TG). Possible mechanisms which induce such the hysteretic behavior are discussed.
@article{arxiv.cond-mat/0302437,
title = {Spin-Glass-like Transition and Hall Resistivity of Y2-xBixIr2O7},
author = {Natsuki Aito and Minoru Soda and Yoshiaki Kobayashi and Masatoshi Sato},
journal= {arXiv preprint arXiv:cond-mat/0302437},
year = {2009}
}