Spontaneous strain in ferroelastic incommensurate [N(CH3)4]2CuCl4 crystals
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Date
1997-01-01
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Abstract
The temperature dependence of spontaneous strain is investigated in the ferroelastic lock-in phase of [N(CHs),&CuCIi crystals by thermal mechanical analysis. The critical index of the order parameter modulus is found to be j3 =0.33. Considerable wall displacements have been detected for shear stress as small as a, =2.4kPa which indicates that the mechanical pinning energy is extremely small. 0 1997 Published by Elsevier Science Ltd
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Subject(s)
A. ferroelastics, D. phase transitions
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ISSN
0038-1098