Intrinsic structural distortion and superexchange interaction in the orthorhombic rare-earth perovskites RCrO3

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...

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Detalhes bibliográficos
Autores: Zhou, J. S., Alonso, J. A., Pomjakushin, V., Goodenough, John B., Ren, Y., Yan, J. Q., Cheng, J. G.
Tipo de documento: artigo
Estado:Versão publicada
Data de publicação:2010
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositório:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/93721
Acesso em linha:http://hdl.handle.net/10261/93721
Access Level:Acceso aberto
Descrição
Resumo: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. © 2010 The American Physical Society.

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