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Ferromagnetism in LaFeO3-LaCrO3 Superlattices

Science  15 May 1998:
Vol. 280, Issue 5366, pp. 1064-1066
DOI: 10.1126/science.280.5366.1064

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Abstract

Ferromagnetic spin order has been realized in the LaCrO3-LaFeO3 superlattices. Ferromagnetic coupling between Fe3+ and Cr3+ through oxygen has long been expected on the basis of Anderson, Goodenough, and Kanamori rules. Despite many studies of Fe-O-Cr–based compounds, random positioning of Fe3+ and Cr3+ ions has frustrated the observation of ferromagnetic properties. By creating artificial superlattices of Fe3+ and Cr3+ layer along the [111] direction, ferromagnetic ordering has been achieved.

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