Theoretical Study of Spin Resonance in Triangular Lattice Heisenberg Antiferromagnet with Easy Axis for Anisotropy Perpendicular to the Plane
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概要
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The spin wave theory is developed on the basis of a triangular lattice lleisenberg antiferromagnet with a single-Ton type anisotropy whose easy axis is perpendicular tothe lattice plane (c-plane) in order to investigate the low-lying excited states of N<:ellike 120' structure on a a-c plane. As a result of calculation only for electronic spins Sas to k=O, a characteristic mode with quite a low energy is olvtained. This mode corresponds to the swinging motion in the a-c plane, and reflects the presentcharacteristic anisotropy and a frustration effect. In addition, the behavior of thismode under the influence of hyperfine coupling (-,4.5?Z) with nuclear spins I is dis-cussed. Consequently, the possibility of the abnormal NMR line whose energy is farless than that of normal NMR (AS) is pointed otmt. Further, the dispersion relationfor various modes is discussed.
- 社団法人日本物理学会の論文
- 1987-04-15
著者
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Natsume Yuhei
Department Of Physics Chiba University
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Suzuki Toshihiko
Department Of Physics Faculty Of Science Chiba University
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Natsume Yuhei
Department Of Phycics Faculty Of Science Chiba University
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Suzuki Toshihiko
Department Of Pediatrics Anjo Kosei Hospital
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