Anomalous magnetoresistance of nonequilibrium Eu-TM (Co, Mo) alloy thin films

T. J. Konno, K. Wakoh, K. Shoji, K. Sumiyama, K. Suzuki

Research output: Contribution to journalArticlepeer-review


We studied the magnetization and magnetoresistance ratio (MR) of nonequilibrium Eu-rich Eu-TM (TM = Co, Mo) alloy thin films prepared by vapour-phase synthesis. We observed that the magnetization curves of the Eu-TM films show an irreversible kink at about 8 T. The longitudinal and transverse MR curves of these films also exhibit irreversible positive-to-negative change at about 8 and 4 T, respectively, while reversible components show only a monotonic decrease. These behaviours are in contrast with the monotonically increasing MR of pure Eu, measured up to 14 T, but are essentially identical to those observed for nonequilibrium Eu-Fe thin films, implying that the anomaly results from structural disorder rather than from the magnetic moments of impurities.

Original languageEnglish
Pages (from-to)5619-5626
Number of pages8
JournalJournal of Physics Condensed Matter
Issue number25
Publication statusPublished - 1998 Jun 29


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