Effect of tolerance factor and local distortion on magnetic properties of the perovskite manganites

J. P. Zhou; J. T. McDevitt; J. S. Zhou; H. Q. Yin; J. B. Goodenough; Y. Gim; Q. X. Jia

doi:10.1063/1.124624

Effect of tolerance factor and local distortion on magnetic properties of the perovskite manganites

J. P. Zhou
, J. T. McDevitt
, J. S. Zhou
, H. Q. Yin
, J. B. Goodenough
, Y. Gim
, Q. X. Jia

Department of Materials Design and Innovation

University of Texas at Austin
Los Alamos National Laboratory

Research output: Contribution to journal › Article › peer-review

71 Scopus citations

Abstract

The substitutions of rare earths for La on the magnetic properties of the perovskites La_0.7-xR_xA_0.3MnO₃ (0<x<0.7), R=Pr or Gd and A=Ca, Sr, or Ba have shown that small substitution of Pr slightly increases the coercive field H_c and magnetization M, and strongly improves the magnetoresistance (MR) while lowering T_c. On the other hand, the substitution of Gd lowers H_c, M and T_c, however, increases MR of the system La_0.7-xGd_xSr_0.3MnO₃ at temperature <T_c. Large differences in the A-site ionic radii r_A of the AMnO₃ perovskites proved detrimental. The optimal composition has been discussed for the half-metallic ferromagnet of a spin-switch device based on the manganese oxides.

Original language	English
Pages (from-to)	1146-1148
Number of pages	3
Journal	Applied Physics Letters
Volume	75
Issue number	8
DOIs	https://doi.org/10.1063/1.124624
State	Published - Aug 23 1999

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title = "Effect of tolerance factor and local distortion on magnetic properties of the perovskite manganites",

abstract = "The substitutions of rare earths for La on the magnetic properties of the perovskites La0.7-xRxA0.3MnO3 (0c and magnetization M, and strongly improves the magnetoresistance (MR) while lowering Tc. On the other hand, the substitution of Gd lowers Hc, M and Tc, however, increases MR of the system La0.7-xGdxSr0.3MnO3 at temperature c. Large differences in the A-site ionic radii rA of the AMnO3 perovskites proved detrimental. The optimal composition has been discussed for the half-metallic ferromagnet of a spin-switch device based on the manganese oxides.",

author = "Zhou, \{J. P.\} and McDevitt, \{J. T.\} and Zhou, \{J. S.\} and Yin, \{H. Q.\} and Goodenough, \{J. B.\} and Y. Gim and Jia, \{Q. X.\}",

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T1 - Effect of tolerance factor and local distortion on magnetic properties of the perovskite manganites

AU - Zhou, J. P.

AU - McDevitt, J. T.

AU - Zhou, J. S.

AU - Yin, H. Q.

AU - Goodenough, J. B.

AU - Gim, Y.

AU - Jia, Q. X.

PY - 1999/8/23

Y1 - 1999/8/23

N2 - The substitutions of rare earths for La on the magnetic properties of the perovskites La0.7-xRxA0.3MnO3 (0c and magnetization M, and strongly improves the magnetoresistance (MR) while lowering Tc. On the other hand, the substitution of Gd lowers Hc, M and Tc, however, increases MR of the system La0.7-xGdxSr0.3MnO3 at temperature c. Large differences in the A-site ionic radii rA of the AMnO3 perovskites proved detrimental. The optimal composition has been discussed for the half-metallic ferromagnet of a spin-switch device based on the manganese oxides.

AB - The substitutions of rare earths for La on the magnetic properties of the perovskites La0.7-xRxA0.3MnO3 (0c and magnetization M, and strongly improves the magnetoresistance (MR) while lowering Tc. On the other hand, the substitution of Gd lowers Hc, M and Tc, however, increases MR of the system La0.7-xGdxSr0.3MnO3 at temperature c. Large differences in the A-site ionic radii rA of the AMnO3 perovskites proved detrimental. The optimal composition has been discussed for the half-metallic ferromagnet of a spin-switch device based on the manganese oxides.

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DO - 10.1063/1.124624

M3 - Article

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SN - 0003-6951

VL - 75

SP - 1146

EP - 1148

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 8

ER -

Effect of tolerance factor and local distortion on magnetic properties of the perovskite manganites

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