B. L. Zink, M. Manno, L. O'Brien, J. Lotze, M. Weiler, D. Bassett, S. J. Mason, S. T. B. Goennenwein, M. Johnson, C. Leighton: Efficient spin transport through native oxides of nickel and permalloy with platinum and gold overlayers. American Physical Society 2016Phys. Rev. B: 93. https://link.aps.org/doi/10.1103/PhysRevB.93.184401