Intrinsic structural distortion and superexchange interaction in the orthorhombic rare-earth perovskites R CrO3

J. S. Zhou; J. A. Alonso; V. Pomjakushin; J. B. Goodenough; Y. Ren; J. Q. Yan; J. G. Cheng

doi:10.1103/PhysRevB.81.214115

Intrinsic structural distortion and superexchange interaction in the orthorhombic rare-earth perovskites R CrO₃

J. S. Zhou, J. A. Alonso, V. Pomjakushin, J. B. Goodenough, Y. Ren, J. Q. Yan, J. G. Cheng

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133 Scopus citations

Abstract

High-resolution neutron powder diffraction has been applied to determine the structural evolution in the orthorhombic perovskite R CrO₃ family. The structural distortions observed have been found to be closely related to the dramatic variation in the magnetic ordering temperature T _N. In addition to the reduction in the orbital overlap integral that can account for the change in TN in the R FeO3 family, the effect of t-e hybridization due to the structural distortions are responsible for the dramatic change in TN across the R CrO₃ family.

Original language	English
Article number	214115
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	81
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevB.81.214115
State	Published - Jun 18 2010
Externally published	Yes

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abstract = "High-resolution neutron powder diffraction has been applied to determine the structural evolution in the orthorhombic perovskite R CrO3 family. The structural distortions observed have been found to be closely related to the dramatic variation in the magnetic ordering temperature T N. In addition to the reduction in the orbital overlap integral that can account for the change in TN in the R FeO3 family, the effect of t-e hybridization due to the structural distortions are responsible for the dramatic change in TN across the R CrO3 family.",

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AU - Alonso, J. A.

AU - Pomjakushin, V.

AU - Goodenough, J. B.

AU - Ren, Y.

AU - Yan, J. Q.

AU - Cheng, J. G.

PY - 2010/6/18

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N2 - High-resolution neutron powder diffraction has been applied to determine the structural evolution in the orthorhombic perovskite R CrO3 family. The structural distortions observed have been found to be closely related to the dramatic variation in the magnetic ordering temperature T N. In addition to the reduction in the orbital overlap integral that can account for the change in TN in the R FeO3 family, the effect of t-e hybridization due to the structural distortions are responsible for the dramatic change in TN across the R CrO3 family.

AB - High-resolution neutron powder diffraction has been applied to determine the structural evolution in the orthorhombic perovskite R CrO3 family. The structural distortions observed have been found to be closely related to the dramatic variation in the magnetic ordering temperature T N. In addition to the reduction in the orbital overlap integral that can account for the change in TN in the R FeO3 family, the effect of t-e hybridization due to the structural distortions are responsible for the dramatic change in TN across the R CrO3 family.

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Intrinsic structural distortion and superexchange interaction in the orthorhombic rare-earth perovskites R CrO₃

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