Spin Hall magnetoresistance at Pt/CoFe2O4 interfaces and texture effects
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Date
2014-10-08Author
Isasa Gabilondo, Miren
Bedoya-Pinto, Amilcar
Vélez, Saül
Golmar, Federico
Sánchez, Florencio
Hueso Arroyo, Luis Eduardo
Fontcuberta, Josep
Casanova Fernández, Félix
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Applied Physics Letters 105 : (2014) // Article ID 142402
Abstract
We report magnetoresistance measurements on thin Pt bars grown on epitaxial (001) and (111) CoFe2O4 (CFO) ferrimagnetic insulating films. The results can be described in terms of the recently discovered spin Hall magnetoresistance (SMR). The magnitude of the SMR depends on the interface preparation conditions, being optimal when the Pt/CFO samples are prepared in situ, in a single process. The spin-mixing interface conductance, the key parameter governing SMR and other relevant spin-dependent phenomena, such as spin pumping or spin Seebeck effect, is found to be different depending on the crystallographic orientation of CFO, highlighting the role of the composition and density of magnetic ions at the interface on spin mixing.