Ferromagnetic resonance in CdCr₂Se₄ with Fe addition

Abstract

The temperature and angle dependences of the resonance field and resonance linewidth have been measured for ferromagnetic CdCr,Se, crystals with Fe addition. An attempt is made to interpret the observations on the basis of the Fez+ energy level model proposed by Hoekstra e t al. and generalized for the case of finite minimum level splitting. The contributions of relaxation mechanisms to the linewidth and resonance field are discussed and the parameters of the model are roughly estimated. TeMIlepaTypHbIe II YrJIOBbIe 3aBHCPiMOCTII pe30HaHCHOrO lIOJIR II WIIPHHbI pe30-HaHCHOi JIHHMII 6bIJIII kI3MepeHbI AJIR @eppOMarHIITHbIX KpIICTaJIJIOB CdCr,Se, c ~0 6 a~~o i i Fe. CAeJIaHa IlOlIJdTKa 06' bRCHIITb 3KCIlepIIMeHTaJIbHbIe pe3yJIbTaTbI Ha OCHOBe MOaeJIII 3HepreTBqeCKIIX YpOBHefi Fez+, Ilpe&JIolKeHHOfi XyHCTpa II xp. kI 0606UeHHOik Ha CJlysat KOHe' IHOTO MHHHMaJIbHOrO paCUellJIeHHR YpOBHeB. 06CYlKAaH)TCR BKJIanbI MeXaHH3MOB peJIaKCaqHH B IIIHPMHY JIHHIIII H pe3OHaHCHOe IlOJIe H 0UeHHBaH)TCR IIapaMeTpbI MOAeJIII.