Open AccessProperties of antiferromagnetic resonance in GdB6
Author(s) -
A. V. Semeno,
M. I. Gilmanov,
N. Yu. Shitsevalova,
S. V. Demishev
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1389/1/012135
Subject(s) - antiferromagnetism , resonance (particle physics) , anisotropy , condensed matter physics , phase (matter) , nuclear magnetic resonance , gyromagnetic ratio , jump , materials science , chemistry , physics , atomic physics , optics , magnetic moment , organic chemistry , quantum mechanics
Antiferromagnetic resonance in GdB6 exhibits a series of anomalous features such as jump of the resonance position at T N = 15.5 K and resonance evolution to four line structure with further temperature decrease. Here we report the study of temperature behaviour of antiferromagnetic resonance modes v ( H 0 ) in AFM phase. We analyzed v ( H 0 ) dependencies at several temperatures T < T N within the model of an antiferromagnet with easy anisotropy axis. In the result we have demonstrated that AFMR behaviour is determined by two following factors: (i) abrupt change of the gyromagnetic ratio γ at T N , which remains constant (corresponding to g-factor g = 1.27) in AFM phase and (ii) jump of zero field frequency v 0 (from v 0 ≈ 0 to v 0 ≈ 20 GHz at T N with its further growth to v 0 ≈ 35 GHz at T = 1.9 K.