Chemical pressure control of the spin-valve magnetoresistance in La1.4Sr1.6Mn2O7

被引：21

作者：

Moritomo, Y ^{[1
]}

Itoh, M

机构：

[1] Nagoya Univ, CIRSE, Nagoya, Aichi 4648603, Japan

[2] Nagoya Univ, Dept Appl Phys, Nagoya, Aichi 4648603, Japan

[3] JST, PRESTO, Chiyoda Ku, Tokyo 102, Japan

来源：

PHYSICAL REVIEW B | 1999年 / 59卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.59.8789

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Comprehensive chemical substitution effects on the magnetic and transport properties have been investigated for single crystals of (La1-zNdz) 1.4Sr1.6Mn2O2 with bilayer structure. In this system, the Nd-doping procedure changes the ground state from ferromagnetic (FM) to antiferromagnetic (AFM), in the latter of which the FM bilayer alternates along the c axis. In the Nd-doped compounds, application of an external magnetic field (H parallel to c) induces an AFM-FM metamagnetic transition. The transition accompanies a switching-like reduction of the current-perpendicular-to-plane resistivity, which can be viewed as a spin-valve magnetoresistance (MR). We have derived magnetic phase diagrams, and discuss controllability of the spin-valve MR by chemical pressure. [S0163-1829(99)03713-3].

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页码：8789 / 8794

页数：6

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