Long-lived free induction decay signal in CsMnF3 single crystal

摘要

Elementary excitations in antiferromagnets are magnons, and these quasiparticles with integerspin are governed by Bose statistics. In certain conditions their density can be controlled byapplied radiofrequency pulse leading to the formation of Bose-Einstein condensation (BEC).We report the investigations of free induction decay signal duration in CsMnF3 under differentconditions and discuss it in the framework of the magnon BEC. The observed results in CsMnF3and previous investigations in superfluid 3He-A are compared.