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Journal of Low Temperature Physics, April 2014, Volume 175, Issue 1-2, pp 395-400.
K. Matsumoto.
Department of Applied Sciences, Muroran Institute of Technology, Muroran, 050-8585, Japan
Abstract
This paper investigates the anisotropy of the adiabatic relaxation time T′2 (T 2(ω), ω→∞, where ω is the Larmor frequency) of adsorbed monolayer solid 3He. We calculate T′2 based on the phenomenological Heisenberg Hamiltonian with the nearest-neighbor and the next nearest-neighbor exchange interactions. Furthermore, the four particle exchange in the triangular plane is also incorporated. To calculate T′2 , it is necessary to compute the second and the fourth moments of the resonance line M02 and M04 . To obtain them, we can use the formulas published in previous studies. From the results, we can observe no significant difference between the nearest-neighbor Heisenberg model and the four particle spin interaction models. A comparison of the present results and the experimental data is briefly discussed.