Hysteretic magnetoresistance in Nd1-xSrxMnO3 films with controlled carrier density

被引：0

作者：

Kasai, Masahiro ^{[1
]}

Kuwahara, Hideki ^{[1
]}

Moritomo, Yutaka ^{[1
]}

Tomioka, Yasuhide ^{[1
]}

Tokura, Yoshinori ^{[1
]}

机构：

[1] Joint Research Cent for Atom, Technology (JRCAT), Tsukuba, Japan

来源：

| 1996年 / JJAP, Minato-ku卷 / 35期

关键词：

Experimental; (EXP);

D O I：

10.1143/jjap.35.l489

中图分类号：

学科分类号：

摘要：

Magnetotransport characteristics and their nominal hole concentration (x) dependence were investigated in Nd1-xSrxMnO3 films. Thermal hysteresis in resistivity indicating the occurrence of a first-order phase transition was observed for x = 0.35 and 0.50, but essentially not for x = 0.40 and 0.45. The x = 0.35 and 0.50 films also show hysteresis in magnetoresistance. Once the resistivity is decreased by an order of magnitude by application of a magnetic field, the low-resistivity state is maintained even after removal of the field below a critical temperature. Observed hysteretic behavior suggests the presence of instabilities which complete with double-exchange interaction in specific hole concentration regions, which may be one of the origins of the colossal magnetoresistance.

引用

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