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Phys. Rev. B 71, 014429 (2005) [6 pages]

Optical response due to many magnons in α-Fe2O3

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S. Azuma1, M. Sato1, Y. Fujimaki2, S. Uchida2, Y. Tanabe3, and E. Hanamura1,*
1Chitose Institute of Science and Technology and Japan Science and Technology Agency, 758-65 Bibi, Chitose, Hokkaido 066-8655, Japan
2Department of Physics, 7-3-1 Hongo, Tokyo 133-8656, Japan
3Department of Applied Physics, University of Tokyo, 7-3-1 Hongo, Tokyo 133-8656, Japan

Received 12 April 2004; revised 30 August 2004; published 21 January 2005

Two- and three-magnon excitations are observed both in the midinfrared absorption and Raman scattering spectrum of α-Fe2O3 crystals. The polarization and temperature dependence of these signals are well understood by group-theoretical analysis, and the microscopic mechanism is discussed for the midinfrared absorption due to two- and three-magnon excitations.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.71.014429
DOI:
10.1103/PhysRevB.71.014429
PACS:
75.30.Ds, 78.30.−j, 75.50.Ee

*Electronic address: hanamura@photon.chitose.ac.jp

 
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