Nonequilibrium quantum dynamics in ferromagnetic nanoparticles: Conditions for Bose-Einstein condensation

Journal Article · Wed Apr 01 04:00:00 EDT 2009 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3067857· OSTI ID:21190164

Johnson, P R ^[1]; Della Torre, E; Bennett, L H ^[2]; Watson, R E ^[3]

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1. Department of Physics, American University, Washington, DC 20016 (United States)
2. School of Engineering and Applied Science, George Washington University, Washington, DC 20052 (United States)
3. Brookhaven National Laboratory, Upton, New York 11973 (United States)

Nanoparticles provide a system where the nonequilibrium dynamics of magnons can be engineered, varied, and studied over many orders of magnitude. This paper describes the conditions for quasiequilibrium phases with either more or less magnons than predicted by Bloch's law, including, if certain conditions hold, a Bose-Einstein condensate phase whose existence should strongly depend on system size.

• OSTI ID: 21190164
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 7 Vol. 105; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BOSE-EINSTEIN CONDENSATION
FERROMAGNETIC MATERIALS
MAGNONS
NANOSTRUCTURES
PARTICLES