The anisotropy of very small cobalt particles

C.P. Bean , J.D. Livingston , D.S. Rodbell

Torque and ferromagnetic resonance measurements on a single crystal of a copper — 2 % cobalt alloy have been made at various temperatures to determine the magnetocrystalline anisotropy of small single domain particles of precipitated cobalt. The anisotropy at 4.2 °K is found to be independent of particle radius from 21 Å to 77 Å, lending support to a crystal field model of the origin of anisotropy. A slight variation of anisotropy with particle size was observed at higher temperatures, and was related to a slight variation in saturation magnetization with particle size at these temperatures.

Mots clés: alloys; cobalt; ferromagnetic materials; magnetisation

Domaines: Articles anciens

C.P. Bean, J.D. Livingston, D.S. Rodbell. The anisotropy of very small cobalt particles. Journal de Physique et le Radium, 1959, 20 (2-3), pp.298-302. ⟨10.1051/jphysrad:01959002002-3029800⟩. ⟨jpa-00236038⟩