Spin-Wave Excitations and Energy Gap in Quasi-One-Dimensional Organic Polymer Ferromagnets |
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| Authors: | Zhong FANG Yu-Qin WANG Zu-Li LIU Kai-Lun YAO |
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| Institution: | 1. National Laboratory of Laser Technology and Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China;
2. International Center of Material Physics, Academy Sinica, Shenyang 110015, China;
3. Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China |
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| Abstract: | Based on a theory model proposed for organic ferrornagnets, the spin configuration and spinwave excitations in quasi-one-dimensional organic polymer ferromagnets are studied. The results show that: 1) Owing to the unpaired electrons at side free-radicals, the degeneracy of the spin-wave will be removed, the lower branch of the spin-wave excitations will split off into two branches, and it shows ferromagnetic characters; 2) The anisotropic interactions between the unpaired electrons at side free-radicals will make an energy gap appear between the ground state and the lowest excited state. |
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