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On the magnon interaction in haematite. I - Magnon energy of optical mode.The effect of magnon interaction on the magnon energies of haematite was studied by the use of a recently developed random phase approximation. In this study, the spin Hamiltonian and the magnon energy were written in a power series of (1/S), where S denotes the magnitude of spin. It is known that the expression of magnon energy is rigorous up to the second term of this series. It is found that the optic mode energy is small if the free optic mode energy is small, which is contrary to Herbert's (1969) conclusion. This direct proportionality between the optic mode energy and the free optic mode energy was not confirmed in the higher order terms of 1/S.
Document ID
19720051692
Document Type
Reprint (Version printed in journal)
Authors
Nagai, O.
Tanaka, T. (Catholic University of America, Washington, D.C., United States)
Bonavito, N. L. (NASA Goddard Space Flight Center Greenbelt, Md., United States)
Date Acquired
August 6, 2013
Publication Date
June 12, 1972
Publication Information
Publication: Journal of Physics
Subject Category
PHYSICS, SOLID-STATE
Funding Number(s)
CONTRACT_GRANT: NGR-09-005-054
Distribution Limits
Public
Copyright
Other