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Role of oxygen vacancies in room-temperature ferromagnetism in cobalt-substitutedSrTiO3
Physical Review B
Ferromagnetic insulating behaviour has recently been demonstrated in cobalt-substituted SrTiO 3 at room temperature  . Experimentally, it was found that a well-defined hysteresis loop only occurs at high Co concentrations of 30-40%. X-ray photoelectron spectroscopy also indicated that Co substitutes for Ti with Co being in high-spin +2 oxidation state. In this work, we employ density-functional theory to explain the experimentally observed properties of cobalt-substituted SrTiO 3 . Wedoi:10.1103/physrevb.90.125130 fatcat:b7mchxg2p5ajrlgmggnhtthps4