Hysteretic Magnetoresistance in Nd 1-x Sr x MnO 3 Films with Controlled Carrier Density

Magnetotransport characteristics and their nominal hole concentration ( x ) dependence were investigated in Nd 1- x Sr x MnO 3 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...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 1996-04, Vol.35 (4B), p.L489
Main Authors: Kasai, Masahiro, Kuwahara, Hideki, Moritomo, Yutaka, Tomioka, Yasuhide, Tokura, Yoshinori
Format: Article
Language:English
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Summary:Magnetotransport characteristics and their nominal hole concentration ( x ) dependence were investigated in Nd 1- x Sr x MnO 3 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 compete with double-exchange interaction in specific hole concentration regions, which may be one of the origins of the colossal magnetoresistance.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.35.L489