QFS2016 Book of Abstracts

Abstracts

P2.35 Magnetism based on rotational tunneling of protons in ice Yen, Fei (1) 1) Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031 P. R. China The magnetization M(T) of ice exhibits an anomalous peak near 60 K and becomes positive near 48-72 K when subjected to external magnetic fields of 2 kOe or less. The field dependent magnetization M(H) exhibits an added hysteretic loop that is superimposed with the diamagnetic signal at low fields in the same temperature range. We conjecture that application of an external magnetic field induces concerted rotational tunneling of protons in groups of six in selective hexamers which create an internal magnetic field component that counters the internal magnetic field created by the electrons. Rotational tunneling of the protons appears to be correlated to the volume of ice which exhibits a minimum near 60 K. The slight discrepancies in M(T) and M(H) suggest that coupling exists between the two magnetic subsystems.

P2.36 Electron Transport on 3 He - 4 He mixture Kitak Kim KAIST, republic of Korea

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