The elastic behaviour of ferroelastic Sb5O7I polytype 2MC studied by ultrasonic experiments and Brillouin scattering

URN to cite this document:: urn:nbn:de:bvb:355-epub-175145
DOI to cite this document:: 10.5283/epub.17514

Rehwald, W. ; Vonlanthen, A. ; Rehaber, E. ; Prettl, Wilhelm

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Date of publication of this fulltext: 26 Oct 2010 12:21

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Abstract

The temperature dependence of the elastic functions of the improper ferroelastic polytype 2MC-Sb5O7I has been investigated in the temperature range from room temperature to well above the structural phase transition atT c=481 K. The stiffnessesc(c*c*),c(a,a),c 22 andc(c*a) show a considerable softening up to 20% aroundT c whereasc 44 remains unaffected by the phase transition. The experimental ...