Frequency Dependence of Resonance Field of One-Dimensional Heisenberg Antiferromagnet KCuF3
SHI Qing-Fan1, Lü Zhen1, MA Mu-Yan2, MA Chao1, LI Liang-Sheng1
1Department of Physics, Faculty of Science, Beijing Institute of Technology, Beijing 100081
2Department of Electric Engineering, Beijing Institute of Machinery, Beijing 100085
Frequency Dependence of Resonance Field of One-Dimensional Heisenberg Antiferromagnet KCuF3
SHI Qing-Fan1;Lü Zhen1;MA Mu-Yan2;MA Chao1;LI Liang-Sheng1
1Department of Physics, Faculty of Science, Beijing Institute of Technology, Beijing 100081
2Department of Electric Engineering, Beijing Institute of Machinery, Beijing 100085
Abstract： The frequency dependence of the in-plane angular change of the antiferromagnetic resonance (AFMR) field of KCuF3 is systematically measured at frequencies ranging from 3.8 to 10.6GHz at 4.2K. The effect of inequivalent g-tensors is found to gradually diminish with decreasing the frequency, and completely vanish when the frequency is decreased to the lower-frequency branch of C-band, while the effect of the effective anisotropy field is significantly enhanced with decreasing the frequency. The calculated AFMR field Hres based on the eight-sublattice model proposed by Yamada and Kato [J. Phys. Soc. Jpn. 63(1994)289] is in good agreement with the experimental data.
SHI Qing-Fan;Lü Zhen;MA Mu-Yan;MA Chao;LI Liang-Sheng. Frequency Dependence of Resonance Field of One-Dimensional Heisenberg Antiferromagnet KCuF3[J]. 中国物理快报, 2006, 23(4): 986-989.
SHI Qing-Fan, Lü Zhen, MA Mu-Yan, MA Chao, LI Liang-Sheng. Frequency Dependence of Resonance Field of One-Dimensional Heisenberg Antiferromagnet KCuF3. Chin. Phys. Lett., 2006, 23(4): 986-989.
2006, Vol. 23 
