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arXiv · 1509.02987

Electronic and magnetic transitions in perovskite SrRu1-xIrxO3 thin films

Abhijit Biswas·Yong Woo Lee·Yoon Hee Jeong
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Abstract

We have investigated the electronic and magnetic properties of perovskite SrRu1-xIrxO3 thin films grown by pulsed laser deposition on atomically-flat (001) SrTiO3 substrates. SrRuO3 has the properties of a ferromagnetic metal with Curie temperature 150 K. Substituting Ir for Ru in SrRuO3, films showed fully-metallic behavior and ferromagnetic ordering, although resistivity increased and the ferromagnetic TC decreased. Films with x = 0.25 underwent the metal-to-insulator transition at 75 K, and spin-glass-like ordering at 45 K with the elimination of ferromagnetic long-range ordering caused by the electron localization at the substitution sites. In ferromagnetic films, resistivity increased near-linearly with T, but in paramagnetic film (x = 0.25) resistivity increased as T3/2. Moreover, observed spin-glass-like (TSG) ordering with the negative magnetoresistance in film with x = 0.25; validates the hypothesis that (Anderson) localization favors glassy ordering at amply disorder limit. These observations provide a promising approach for future applications and of fundamental interest in 4d and 5d mixed perovskites.

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Abhijit Biswas, Yong Woo Lee, Yoon Hee Jeong. 2015-09-10. Electronic and magnetic transitions in perovskite SrRu1-xIrxO3 thin films. https://doi.org/10.1063/1.4929966

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