Nuclear Ferromagnetic and Antiferromagnetic Exchange in Thin Films of 3 He Adsorbed on Graphite

Research output: Contribution to conferenceAbstract


Measurements of the nuclear magnetic susceptibility of multilayer films of 3 He adsorbed on graphite plated with a monolayer of 4 He are reported for 3 He surface densities up to 0.27 Å -2 and temperatures in the range (6÷600) mK. The coverage dependence of the exchange constant has been measured; this is antiferromagnetic when the second layer first solidifies and becomes ferromagnetic with the formation of a fluid overlayer. The second-layer solid density evolves in a stepwise fashion with increasing coverage, while the susceptibility of the fluid overlayer shows structure associated with layering in the film.
Original languageEnglish
Publication statusPublished - 1991

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