Co-doped La0.5Sr0.5TiO3−δ: Diluted magnetic oxide system with high Curie temperature
/ Authors
Y. Zhao, S. Shinde, S. Ogale, J. Higgins, S. Lofland, C. Lanci, J. Buban, N. Browning, S. Das Sarma, A. Millis
and 4 more authors
/ Abstract
Ferromagnetism is observed at and above room temperature in pulsed laser deposited epitaxial films of Co-doped Ti-based oxide perovskite (La0.5Sr0.5TiO3−δ). The system has the characteristics of an intrinsic diluted magnetic semiconductor (metal) at low concentrations (<∼2%), but develops inhomogeneity at higher cobalt concentrations. The films range from being opaque metallic to transparent semiconducting depending on the oxygen pressure during growth and are yet ferromagnetic.
Journal: Applied Physics Letters
DOI: 10.1063/1.1610796