On the theory of spatially inhomogeneous Bose-Einstein condensation of magnons in yttrium iron garnet

被引：3
|
作者：
Bugrij, A. I. [1 ]
Loktev, V. M. [1 ]
机构：
[1] NAS Ukraine, N Bogolyubov Inst Theoret Phys, UA-03143 Kiev, Ukraine
来源：
LOW TEMPERATURE PHYSICS | 2013年 / 39卷 / 12期
关键词：
GAS;
D O I：
10.1063/1.4843356
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The Bose-Einstein condensation (BEC) of magnons created by a strong pumping in ferromagnetic thin films of yttrium iron garnet used as systems of finite size is considered analytically. Such a peculiarity, typical for this magnetic material, as the presence of a minimum in the spectrum of spin waves at a finite value of the wave vector is taken into account. The definition of high-temperature BEC is introduced and its characteristics are discussed. A role of boundary conditions for spin variables is analyzed, and it is shown that in the case of free spins on the boundary the magnon lattice can form in the system. The factors responsible for its appearance are discussed (C) 2013 AIP Publishing LLC.
引用
收藏
页码：1037 / 1047
页数：11
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