Heat Capacity Anomaly of Ag Ultrafine Particles at Low Tempperatures

概要

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The heat capacity of ultrafine particles of silver (21 nm) was measured by anadiabatic method between 1.6 K and 13 K. The capacity was smaller than that of bulkAg at lower temperatures and larger at higher temperatures. A peak and a hump wereobserved at 1.8 K and 3.4 K in the curve of temperature dependance of heat capacity.A trough and sharp cutoff were found in the curve at 2.2 K and 1.6 K. By sintering thesample, periodical multiple peaks appeared in the curve at lower temperatures andheat capacity at higher temperatures decreased to the same value as that of bulk.These phenomena are interpreted in terms of resonance of lattice vibration in a parti-cle.[ultrafine particles, heat capacity, low-temperature adiabatic method, cutting off, ll resonance, experimentl
社団法人日本物理学会の論文
1990-05-15