Low Temperature Physics: 33, 948 (2007); https://doi.org/10.1063/1.2747071 (4 pages)
Физика Низких Температур: Том 33, Выпуск 11 (Ноябрь 2007), c. 1248-1252    ( к оглавлению , назад )

Re-distribution (condensation) of magnons in a ferromagnet under pumping

A.A. Zvyagin

B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., Kharkov 61103, Ukraine
E-mail: zvyagin@ilt.kharkov.ua

Received April 20, 2007


Last years several experiments were performed, which studied the Bose-Einstein condensation of quasi-particles, in particular, magnons in magnetically ordered systems. Recently the Bose-Einstein condensation of magnons was observed at room temperatures in a ferromagnetic film. The theory of the condensation (re-distribution) of magnons under the conditions of pumping, which explains many features of that experiment, is presented. The use of the term «Bose-Einstein condensation of magnons» is discussed.

PACS: 03.75.Nt Other Bose-Einstein condensation phenomena;
PACS: 75.45.+j Macroscopic quantum phenomena in magnetic systems;
PACS: 76.50.+g Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance.

Ключевые слова: condensation of magnons, parametric pumping.