Direct optical excitation of two and three magnons in α-Fe₂O₃

Direct optical excitation of two and three magnons in α-Fe₂O₃

Tanabe, Y. ; Fujimaki, Y. ; Kojima, K. ; Uchida, S. ; Onari, S. ; Matsuo, T. ; Azuma, S. ; Hanamura, E.

Тема: К семидесятилетию антиферромагнетизма

Інший ID: PACS: 75.30.Ds, 78.30.–j, 75.50.Ee

URI: http://dspace.nbuv.gov.ua/handle/123456789/121697

Посилання: Direct optical excitation of two and three magnons in α-Fe₂O₃ / Y. Tanabe, Y. Fujimaki, K. Kojima, S. Uchida, S. Onari, T. Matsuo, S. Azuma, E. Hanamura // Физика низких температур. — 2005. — Т. 31, № 8-9. — С. 1024-1031. — Бібліогр.: 34 назв. — англ.

Дата: 2005

Завантажень: 464

Direct optical excitation of two and three magnons in α-Fe₂O₃

Анотація:

Direct excitation of two and three magnons is observed in midinfrared absorption and Raman scattering spectra of α-Fe₂O₃ crystals. These polarization characteristics and the spectra themselves are shown to be understood from group-theoretical point of view. The microscopic mechanism of three-magnon excitation is proposed in addition to that of well-known two-magnon excitation process.

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