Abstract
Upper critical field and its anisotropy have been measured on two very short wavelength Mo-Ni heterostructures of different degrees of perfection, λ = 13.8Å (disordered structure) and λ = 16.6Å (layered structure). In both cases the parallel critical field has an unexpected temperature dependence, a large and temperature dependent anisotropy, and over 60% enhancement over the Clogston-Chandrasekhar limit. Data are fit to the Werthamer-Helfand-Hohenberg theory and the spin-orbit scattering times are found to be 1.79 × 10−13 sec and 2 × 10−13 sec, respectively.
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Uher, C., Watson, W.J., Cohn, J.L. et al. Upper Critical Field of Mo-Ni Heterostructures. MRS Online Proceedings Library 56, 455–460 (1985). https://doi.org/10.1557/PROC-56-455
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DOI: https://doi.org/10.1557/PROC-56-455