Electronic and magnetic properties of
- 1 December 1998
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 58 (22), 14908-14912
- https://doi.org/10.1103/physrevb.58.14908
Abstract
Electronic and magnetic properties of the perovskitelike compounds of have been studied by measuring electrical resistivity, magnetic susceptibility, magnetization, and magnetoresistance. All the compounds except show a ferromagnetic metal-paramagnetic insulator transition at of the present compounds depend on the tolerance factor t and when t is larger than 0.913 the relations between and t are almost the same as those observed in the perovskitelike compounds previously examined, which contain rare-earth metal ions, such as and When t is smaller than 0.907, a spin glass insulator appears at low temperature. This insulator is different from the ferromagnetic insulator that appears in the compounds containing light rare-earth metal ions, such as and/or but the same as that appears in the compound containing heavy rare-earth ions of It has been found that, when t takes a value between 0.907 and 0.913, the reentrant spin-glass state appears. Colossal magnetoresistance and tunneling magnetoresistance are clearly observed in the compounds.
Keywords
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