X-ray structural investigations of the phase transition in benzyl crystals

The Bragg (fundamental) and diffuse reflections from the M -points of the Brillouin zone boundary of the paraphase of the benzyl crystals, whose integrated intensity is related to the order parameter and its fluctuations, respectively, have been investigated. The original information on the temperat...

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Bibliographic Details
Published inPhysics of the solid state Vol. 55; no. 9; pp. 1835 - 1839
Main Authors Markov, Yu. F., Roginskii, E. M.
Format Journal Article
LanguageEnglish
Published Boston Springer US 01.09.2013
Springer
Subjects
Anisotropy
Dielectrics
Investigations
Physics
Physics and Astronomy
Solid State Physics
Order Phase Transition
Brillouin Zone
Phase Transition
Diffuse Reflection
Half Width
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Summary:The Bragg (fundamental) and diffuse reflections from the M -points of the Brillouin zone boundary of the paraphase of the benzyl crystals, whose integrated intensity is related to the order parameter and its fluctuations, respectively, have been investigated. The original information on the temperature behavior of the order parameter and the diffuse scattering is obtained and the values of the corresponding critical exponents are determined. The temperature behavior of the correlation radius and its anisotropy are analyzed. The conclusion is drawn that the phase transition in these crystals is close to the tricritical point. The mechanism of the phase transition in the benzyl crystals alternative to the “trigger” mechanism is suggested.
ISSN:1063-7834
1090-6460
DOI:10.1134/S1063783413090230