title: Tuning ferromagnetism at interfaces between insulating perovskite oxides.
abstract: We use density functional theory calculations to show that the LaAlO3|SrTiO3 interface between insulating perovskite oxides is borderline in satisfying the Stoner criterion for itinerant ferromagnetism and explore other oxide combinations with a view to satisfying it more amply. The larger lattice parameter of a LaScO3|BaTiO3 interface is found to be less favorable than the greater interface distortion of LaAlO3|CaTiO3. Compared to LaAlO3|SrTiO3, the latter is predicted to exhibit robust magnetism with a larger saturation moment and a higher Curie temperature. Our results provide support for a "two phase" picture of coexistent superconductivity and ferromagnetism.
authors.affiliation: Faculty of Science and Technology and MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.
authors.forename: Nirmal
authors.initials: N
authors.lastname: Ganguli
authors.affiliation: Faculty of Science and Technology and MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.
authors.forename: Paul J
authors.initials: PJ
authors.lastname: Kelly
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry; D017610:Calcium Compounds / Q000737:chemistry*; D007811:Lanthanum / Q000737:chemistry; D059346:Magnets / Q000737:chemistry*; D008956:Models, Chemical; D008962:Models, Theoretical; D010087:Oxides / Q000737:chemistry*; D012538:Scandium / Q000737:chemistry; D014025:Titanium / Q000737:chemistry*
chemical_list: D017610:Calcium Compounds; D010087:Oxides; C059910:perovskite; D007811:Lanthanum; D014025:Titanium; D000537:Aluminum Oxide; C046254:scandium oxide; D012538:Scandium