Tunable magnetization damping in transition metal ternary alloys

Details Tunable magnetization damping in transition metal ternary alloys Tunable magnetization damping in transition metal ternary alloys

2004-08-27

arxiv.org/abs/cond-mat/0408608v1

Physics

Condensed Matter

Materials Science

4 pages, submitted to Appl. Phys. Lett

Scientific paper

10.1063/1.1828232

We show that magnetization damping in Permalloy, Ni80Fe20 (``Py''), can be enhanced sufficiently to reduce post-switching magnetization precession to an acceptable level by alloying with the transition metal osmium (Os). The damping increases monotonically upon raising the Os-concentration in Py, at least up to 9% of Os. Other effects of alloying with Os are suppression of magnetization and enhancement of in-plane anisotropy. Magnetization damping also increases significantly upon alloying with the five other transition metals included in this study (4d-elements: Nb, Ru, Rh; 5d-elements: Ta, Pt) but never as strongly as with Os.

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