Elastic wave surfaces for the (111) plane of cubic crystals

Iyer, V. Narasimha ; Viswanathan, K. S. (1981) Elastic wave surfaces for the (111) plane of cubic crystals Pramana - Journal of Physics, 17 (2). pp. 135-142. ISSN 0304-4289

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Official URL: http://www.ias.ac.in/j_archive/pramana/17/2/135-14...

Related URL: http://dx.doi.org/10.1007/BF02875429


The nature of inverse velocity surfaces as well as energy surfaces for elastic wave propagation in the (111) plane have been studied for a number of cubic crystals. The sections of inverse velocity surfaces by the (111) plane exhibit six-fold symmetry in all cases. Cuspidal edges are exhibited with a six-fold symmetry by both the slow transverse and fast transverse shear modes in the (111) plane, unlike the case of the (100) and (110) planes for which only the slow transverse shear mode exhibits cuspidal edges. The slow transverse mode energy surface exhibits cuspidal edges along (112) direction or an equivalent symmetry direction. The inverse velocity surfaces of the A-15 compounds exhibit unusually large inflexions for the slow transverse mode, whereas their energy surfaces have large cuspidal edges which intersect each other resulting in common regions of cusps.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Inverse Velocity Surfaces; Energy Surfaces; A-15 Compounds; Cuspidal Edges
ID Code:68487
Deposited On:02 Nov 2011 08:05
Last Modified:18 May 2016 15:17

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