Specific heat measurements of Yb4As3

P.H.P. Reinders,U. Ahlheim,K. Fraas,F. Steglich,T. Suzuki

PHYSICA B（1993）

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摘要

The specific heat of Yb4As3, a mixed-valence system, has been measured down to 100 mK in magnetic fields up to 4 T. At low temperature a nuclear contribution in the specific heat is seen. The Sommerfeld coefficient gamma is approximately 150 mj/K2 mole at zero field. The magnetic field opens up a gap at low temperatures.

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