High spin polarization in epitaxial films of ferrimagnetic Mn3Ga

By H. Kurt, K. Rode, M. Venkatesan, P. Stamenov, J. Coey. 2010

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Ferrimagnetic Mn${}_{3}$Ga exhibits a unique combination of low saturation magnetization (${M}_{s}=0.11$ MA m${}^{\ensuremath{-}1}$) and high perpendicular anisotropy with a uniaxial anisotropy constant of ${K}_{\mathrm{u}}$ $=$ 0.89 MJ m${}^{\ensuremath{-}3}$. 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.

Subfields: Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/e37fc9e307d8adc7891d74ee0e2b77921e65d2d0