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Phys. Rev. B 53, 12166–12172 (1996)

[Issue 18 – 1 May 1996 ]

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Exchange stiffness, magnetization, and spin waves in cubic and hexagonal phases of cobalt

X. Liu, M. M. Steiner, and R. Sooryakumar

Department of Physics, The Ohio State University, Columbus, Ohio 43210

G. A. Prinz

Naval Research Laboratory, Washington, DC, 20375

R. F. C. Farrow and G. Harp

IBM Almaden Research Center, San Jose, California 95120

We utilize Brillouin light scattering to investigate the magnetic properties of the hexagonal-close-packed as well as the body- and face-centered cubic phases of elemental cobalt stabilized as thin epilayers. Expressions for the dependence of the surface and bulk magnons on applied magnetic field and in-plane propagation direction yield the exchange stiffness constant D, saturation magnetization M, and magnetic anisotropy fields of the cobalt atoms synthesized in these distinct crystal structures. Estimates of D and M are also calculated from the electronic band structure for the different crystalline phases. Satisfactory agreement is found between theory and experiment. The implications of these results towards our understanding of magnetic properties of itinerant ferromagnets are discussed.

©1996 The American Physical Society

URL: http://link.aps.org/abstract/PRB/v53/p12166
DOI: 10.1103/PhysRevB.53.12166
PACS: 62.20.Dc, 78.35.+c, 75.30.Ds

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