Article ID Journal Published Year Pages File Type
1591509 Solid State Communications 2015 5 Pages PDF
Abstract

•Epitaxial Mn3O4 films with biaxial compressive in-plane strain have been fabricated on SrTiO3 surface.•The film exhibits obvious magnetodielectric behavior near the paramagnetic–ferrimagnetic transition temperature.•The magnetic and magnetodielectric properties are tuned by the in-plane strain.•The strong coupling between lattice, spin, and orbital degrees of freedom in Mn3O4 is determined.

The (001)-orientated Mn3O4 thin films were fabricated on Nb-doped SrTiO3 (001) substrates by a pulsed laser deposition method, and the structural, magnetic, and magnetodielectric properties were investigated. We found that the as-prepared thin film is tetragonal with biaxial compressive strain in the film plane. The orientation relationship in the film plane is Mn3O4 [100] || SrTiO3 [110]. Compared with the single crystals, the paramagnetic–ferrimagnetic transition temperature TN is greatly increased due to the in-plane compressive strain. At TN, a sharp drop in the dielectric constant was observed. Under a magnetic field, the dielectric constant shows a negative field-direction dependent response around TN. Our experiments indicated the strong coupling between the strain, lattice, spin, and orbital degrees of freedom in the epitaxial Mn3O4 thin films.

Related Topics
Physical Sciences and Engineering Materials Science Materials Science (General)
Authors
, , , , , , ,