Bose-Einstein condensation of magnons in ferromagnetic thin films

abstract

• Experimental evidence for Bose-Einstein condensation (BEC) of magnons at room temperature in a thin film of yttrium iron garnet (YIG) excited by parallel pumping is already available and different features of the experimental results have been explained qualitatively [Nature 443, 430 (2006)]. In the present work, we explain quantitatively different aspects of this experimental observation through spin wave treatment. In the case of parallel pumping field, we have developed a formula for the time required for the formation of magnon BEC in a thin film of ferromagnetic material. This relation is found to be in good agreement with known experimental results. In a similar treatment we predict the condition for the formation of BEC of magnons in the case of perpendicular pumping. 2012 Taylor & Francis.

authors

• Klein, Douglas

published proceedings

• PHASE TRANSITIONS

author list (cited authors)

• Kar, R., Misra, A., March, N. H., & Klein, D. J.

citation count

• 0

complete list of authors

• Kar, Rakesh||Misra, Anirban||March, NH||Klein, DJ

publication date

• September 2012

publisher

• Taylor & Francis  Publisher

published in

• Phase Transitions: a multinational journal  Journal

keywords

• Bose-einstein Condensation
• Magnon
• Parallel Pumping
• Perpendicular Pumping
• Spin Wave

Digital Object Identifier (DOI)

• 10.1080/01411594.2012.682060

start page

• 831

end page

• 839

volume

• 85

issue

• 9

URL

• http://dx.doi.org/10.1080/01411594.2012.682060