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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 |
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| Cite this article: |
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SHI Qing-Fan, Lü Zhen, MA Mu-Yan et al 2006 Chin. Phys. Lett. 23 986-989 |
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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.
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| Keywords:
75.50.Ee
75.25.+z
75.30.Gw
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Published: 01 April 2006
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