Emergence of ferromagnetism and Jahn-Teller distortion in LaMn1−xCrxO3 (x < 0.15)

The emergence of a ferromagnetic component in LaMnO3 with low Cr-for-Mn substitution has been studied by x-ray absorption spectroscopy and x-ray magnetic circular dichroism at the Mn and Cr K edges. The local magnetic moment strengths for Mn and Cr are proportional to each other and follow the macro...

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Detalles Bibliográficos
Autores: Ramos, Aline Y., Tolentino, Helio C. N., Soares, Márcio M., Grenier, Stéphane, Bunau, Oana, Joly, Yves, Baudelet, Francois, Wilhelm, Fabrice, Rojalev, Andrei, Souza, Raquel A., Souza Neto, Narcizo M., Proux, Olivier, Testemale, Denis, Caneiro, Alberto
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2013
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/19367
Acceso en línea:http://hdl.handle.net/11336/19367
Access Level:acceso abierto
Palabra clave:Jahn Teller Distortion
Emergence of Ferromagnetism
Lamn1−Xcrxo3
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
Descripción
Sumario:The emergence of a ferromagnetic component in LaMnO3 with low Cr-for-Mn substitution has been studied by x-ray absorption spectroscopy and x-ray magnetic circular dichroism at the Mn and Cr K edges. The local magnetic moment strengths for Mn and Cr are proportional to each other and follow the macroscopic magnetization. The net ferromagnetic components of Cr3+ and Mn3+ are found antiferromagnetically coupled. Unlike hole doping by La site substitution, the inclusion of Cr3+ ions up to x=0.15 does not decrease the Jahn-Teller (JT) distortion and consequently does not significantly affect the orbital ordering. This demonstrates that the emergence of the ferromagnetism is not related to JT weakening and likely arises from a complex orbital mixing.

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