Magnetism of NiMn2O4-Fe3O4 Spinel Interfaces

Details Magnetism of NiMn2O4-Fe3O4 Spinel Interfaces Magnetism of NiMn2O4-Fe3O4 Spinel Interfaces

2007-09-21

arxiv.org/abs/0709.3518v2

J. Appl. Phys. 103, 07B524 (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

3 figures

Scientific paper

10.1063/1.2838320

We investigate the magnetic properties of the isostructural spinel-spinel interface of NiMn2O4(NMO)-Fe3O4. Although the magnetic transition temperature of the NMO film is preserved, both bulk and interface sensitive measurements demonstrate that the interface exhibits strong interfacial magnetic coupling up to room temperature. While NMO thin films have a ferrimagnetic transition temperature of 60K, both NiFe2O4 and MnFe2O4 are ferrimagnetic at room temperature. Our experimental results suggest that these magnetic properties arise from a thin interdiffused region of (Fe,Mn,Ni)3O4 at the interface leading to Mn and Ni magnetic properties similar to MnFe2O4 and NiFe2O4.

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