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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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