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

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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 (US)
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

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.124624

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

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