Spin-diffusion lengths ofCu1−xNixusing current perpendicular to plane magnetoresistance measurements of magnetic multilayers
| Autor: | P. Holody, William P. Pratt, Shih-Ying Hsu, Peter A. Schroeder, J. M. Rittner, Reza Loloee |
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| Rok vydání: | 1996 |
| Předmět: | |
| Zdroj: | Physical Review B. 54:9027-9030 |
| ISSN: | 1095-3795 0163-1829 |
| DOI: | 10.1103/physrevb.54.9027 |
| Popis: | Spin-relaxation effects are generally believed to have a strong influence on giant magnetoresistance of ferromagnetic/noble-metal multilayers. We have measured current perpendicular to plane magnetoresistances (CPP MR's) of sputtered Co/${\mathrm{Cu}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{Ni}}_{\mathit{x}}$ multilayers with x=0.06, 0.10, 0.14, and 0.23. Our results indicate that the spin-diffusion length of CuNi is reduced as the concentration of Ni increases. Spin-diffusion lengths obtained from fitting the CPP MR to Valet-Fert theory are in a good agreement with theoretical calculations from spin-orbit scattering. Assuming that the permalloy(Py)-Cu interface in Py/Cu multilayers resembles a CuNi alloy, we can conclude that there will be spin-flip scattering at a Py-Cu interface, but we expect its effect on the MR to be small. \textcopyright{} 1996 The American Physical Society. |
| Databáze: | OpenAIRE |
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