Anomalous thermal and NMR behavior of liquid 3He in contact with an antiferromagnet |
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| Authors: | Sinhachiro Saito KŌzŌ Satoh Tadashi Sugawara |
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| Affiliation: | (1) The Research Institute for Iron, Steel, and Other Metals, Tohoku University, Katahira, Sendai, Japan;(2) The Institute for Solid State Physics, The University of Tokyo, Roppongi, Minato-ku, Tokyo, Japan |
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| Abstract: | Anomalous thermal and NMR behavior has been observed in liquid 3He in contact with a single crystal of Cu(NH3)4 · SO4 · H2O, which is a magnetically one-dimensional substance. In the presence of a temperature gradient in the vertical direction and parallel to the crystal surface, the temperature of the system and the 3He NMR signal change abruptly at a temperature just above the antiferromagnetic transition temperature of the salt (0·43 K). From the experimental results it is suggested that at the onset of the anomaly the spin-lattice relaxation time of 3He is reduced and a flow is induced in liquid 3He near the surface of the crystal.This work was supported by a Research Grant of the Iwatani Naoji Foundation and a Grant-in-Aid for Scientific Research (Japan). |
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