Successive Jahn-Teller Phase Transitions in K_2PbCu (NO_2)_6
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概要
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The mechanism of the successive phase transitions in K.PbCu(N0z)5 is studiedon the basis of an order-disorder model. By the use of the Fourier transform ofthe order parameter, the ordering energies are compared in the various phases.The antiferro-distortive phase INN of K.PbCu(NO.)5 has a lower order'ing energy,and stable at low temperatures. A phase transition from the phase III to theincommensurate sinusoidal phase II is occurred because of an entropy gain.The free energies and order parameters are calculated as functions of temperature.
- 社団法人日本物理学会の論文
- 1978-08-15
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