Itinerant ferromagnetism and geometrically suppressed metal-insulator transition in epitaxial thin films of Ca 2 RuO 4

We have investigated the effect of epitaxial strain on the electrical and magnetic properties of high quality Ca 2 RuO 4 films on LaAlO 3 (001) substrates. The films exhibit low temperature itinerant ferromagnetic ground state and significantly suppressed metal-insulator transition due to epitaxial...

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Bibliographic Details
Published in:Applied physics letters 2012-01, Vol.100 (5), p.052401-052401-3
Main Authors: Miao, Ludi, Silwal, Punam, Zhou, Xiaolan, Stern, Ilan, Peng, Jin, Zhang, Wenyong, Spinu, Leonard, Mao, Zhiqiang, Ho Kim, Dae
Format: Article
Language:English
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Summary:We have investigated the effect of epitaxial strain on the electrical and magnetic properties of high quality Ca 2 RuO 4 films on LaAlO 3 (001) substrates. The films exhibit low temperature itinerant ferromagnetic ground state and significantly suppressed metal-insulator transition due to epitaxial strain. An anomaly in the in-plane resistivity was also observed near the Néel temperature. Symmetry analysis of anisotropic magnetoresistance suggests a phase coexistence of ferromagnetic metal and antiferromagnetic insulator in ground state.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3680250