Noncollinear Magnetism in Fe₃O₄ Induced via Site-Selective Rare-Earth Substitution Boosting Its Saturation Magnetization.

ABSTRACT: Substituting rare-earth Eu ions with a large atomic number into 3d transition metal oxides can precisely control their magnetic properties through significant spin-orbit coupling, leading to noncollinear magnetism. Experimental investigations are combined with density functional theory to explore site-selective Eu³⁺ substitution as a strategy to enhance the magnetic properties of Fe₃O₄ thin films. The substitution location of Eu³⁺, that is, octahedral versus tetrahedral, is confirmed by electrical resistivities and valence band photoemission measurements. Tetrahedrally Eu-substituted Fe₃O₄ exhibited an exceptionally enhanced saturation magnetization M_S of up to 4.4 μ_B/f.u. because of noncollinearity, wh

SUBMITTER: Li H 

PROVIDER: S-EPMC11962706 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature