Spin flop in one-dimensional Heisenberg antiferromagnet KCuF3
Shi Qing-Fan (史庆藩)a, Li Liang-Sheng (李良生)a, Wang Qi (王琪)b
a Department of Physics, School of Science, Beijing Institute of Technology, Beijing 100081, China; b Department of Physics, Yancheng Teacher's Collegy, Yancheng 224002, China
Abstract Following Yamada and Kato [J. Phys. Soc. Japan 63 (1994) 289], we have calculated the frequency－field diagram of antiferromagnetic resonance of KCuF$_3$ using an eight-sublattice model and mean field approximation. A spin flop is found to take place from the [110]p to a direction perpendicular to [110]p in the c-plane at $H\simeq 42172$A/m, which is in good agreement with the data obtained by measuring magnetic susceptibility.
Received: 01 August 2003
Revised: 25 October 2003
Accepted manuscript online:
PACS:
76.50.+g
(Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance)
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