High spin polarization in epitaxial films of ferrimagnetic Mn3Ga

Abstract

Ferrimagnetic Mn3Ga exhibits a unique combination of low saturation magnetization (Ms = 0.11 MA m-1) and high perpendicular anisotropy with a uniaxial anisotropy constant of Ku = 0.89 MJ m-3. Epitaxial c-axis films exhibit spin polarization as high as 58%, measured using point contact Andreev reflection. These epitaxial films will be able to support thermally stable sub-10 nm bits for spin transfer torque memories.

13 pages, 3 figures, 1 table

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• A new platform for topological quantum phenomena : Topological Insulator states in thermoelectric Heusler-related ternary compounds

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