Evidence for breakdown of ferromagnetic order below TC in the manganite La0.8Ca0.2MnO3

被引：71

作者：

Chechersky, V

Nath, A ^{[1
]}

Isaac, I

Franck, JP

Ghosh, K

Ju, H

Greene, RL

机构：

[1] Drexel Univ, Dept Chem, Philadelphia, PA 19104 USA

[2] Univ Alberta, Dept Phys, Edmonton, AB T6G 2J1, Canada

[3] Univ Maryland, Dept Phys, Ctr Superconduct Res, College Pk, MD 20742 USA

来源：

PHYSICAL REVIEW B | 1999年 / 59卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.59.497

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report an emission Mossbauer study of the ferromagnetic metal La0.8Ca0.2Mn(Co-57)O-3, where a few parts-per-million of Mn are replaced by Co-57. The behavior observed is dramatically different than that for a conventional ferromagnet. The data give strong evidence for an anomalous gradual crumbling of the ferromagnetic order, and the formation of spin clusters below as well as above the Curie temperature (T-C) Application of a magnetic field, even well above T-C, results in a dramatic coalescence of small spin clusters into larger clusters with more ordered spins. The cluster size is found to be strongly dependent on the magnitude of the applied field. [S0163-1829(99)08301-0].

引用

页码：497 / 502

页数：6

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