Exchange-induced phase separation in Ni-Cu films

Details Exchange-induced phase separation in Ni-Cu films Exchange-induced phase separation in Ni-Cu films

2012-01-31

arxiv.org/abs/1201.6493v1

Physics

Condensed Matter

Materials Science

5 pages, 6 figures

Scientific paper

Magneto-structural properties of films of diluted ferromagnetic alloys Ni$_x$Cu$_{1-x}$ in the concentration range $0.7 < x < 1.0$ are studied experimentally. Films deposited by magnetron sputtering show partial phase separation, as evidenced by structural analysis and ferromagnetic resonance measurements. The phase diagram of the Ni$_x$Cu$_{1-x}$ bulk system is obtained using numerical theoretical analysis of the electronic structure, taking into account the inter-atomic exchange interactions. The results confirm the experimentally found partial phase separation, explain it as magnetic in origin, and indicate an additional metastable region connected with the ferromagnetic transition in the system.

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