Critical Behavior of Adiabatic and Isothermal Elastic Compliances of NaNO_2

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概要

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• The adiabatic elastic compliances, .vf, (/=l, 2, 3), of NaN0z were measurednear 7'.(l65.3'C) and 7'.(l64.0'C) by a composite-oscillator method. The isother-mat compliances, sf, were calculated from .s'f, and the data on specific heat atconstant pressure, C., and thermal expansion c:oefficients, p,. The isothermalcompliances tend to diverge toward 7'N, while the adiabatic compliances exhibitonly small cusps at this temperature. It was fottnd that the Pippard equationshold among sfj, 73, and C., and the anomalous part of .vf, is proportional to - TIC..From a thermodynamic relation between elastic compliances and specific heat,it is expected that, incontrast to a large 2-like anomaly of C., the specific heat atconstant volume shows only a small cusp-like anomaly at T.. This means thatthe growth of the long-range and short-range order is dramatically suppressedif the free thermal expansion of the crystal is inhibited.

• 社団法人日本物理学会の論文
• 1978-09-15

著者

• EMA Kenji

  Department of Physics,Faculty of Science,Tokyo Institute of Technology

• HAMANO Katsumi

  Department of Physics,Faculty of Science,Tokyo Institute of Technology

• Ema K

  Graduate School Of Science And Engineering Tokyo Institute Of Technology

• Ema Kenji

  Department Of Physics Faculty Of Science Tokyo Institute Of Technology

• Hamano Katsumi

  Department Of Physics College Of Science Tokyo Institute Of Technology

• Ema Kenji

  Department of Organic Synthesis, Kyushu University

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