THERMODYNAMIC PROPERTIES OF MULTILAYER HE-3 FILMS DESCRIBED BY HIGH-TEMPERATURE SERIES EXPANSIONS OF THE MULTIPLE SPIN-EXCHANGE HAMILTONIAN

Authors
BAUERLE C BOSSY J BUNKOV YM CHEN AS GODFRIN H ROGER M
Citation
C. Bauerle et al., THERMODYNAMIC PROPERTIES OF MULTILAYER HE-3 FILMS DESCRIBED BY HIGH-TEMPERATURE SERIES EXPANSIONS OF THE MULTIPLE SPIN-EXCHANGE HAMILTONIAN, Journal of low temperature physics, 110(1-2), 1998, pp. 345-350
Citations number
5
Categorie Soggetti
Physics, Applied
Journal title
Journal of low temperature physics → ACNP
ISSN journal
00222291
Volume
110
Issue
1-2
Year of publication
1998
Pages
345 - 350
Database
ISI
SICI code
0022-2291(1998)110:1-2<345:TPOMHF>2.0.ZU;2-8
Abstract
We report high precision NMR measurements of the susceptibility of He- 3 films adsorbed on graphite in a the temperature range 4-300 mK using a fine coverage grid between 0.185 and 0.285 atoms/Angstrom(2). High temperature series expansions of the multiple spin exchange Hamiltonia n fit accurately the susceptibility as well as available heat capacity data, providing a consistent description of the structural and thermo dynamic properties of He-3 films. A long standing paradox for the ferr omagnetic regime (heat capacity and susceptibility are described by th e Heisenberg model, but with different exchange constants) is quantita tively explained by the MSE model.