Structural studies of phase transitions
نویسندگان
چکیده
منابع مشابه
Studies of Structural Patterns at Phase Transitions
The work described in this thesis comprises two distinct components. In the first part, Monte-Carlo computer simulation methods are employed within a finite-size scaling framework to investigate both universal and non-universal behaviour in two scalar models, the 1-d 04 model and the 2-d Lennard-Jones fluid. In both these models the properties of interest are obtained from studies of the large-...
متن کاملStructural phase transitions
Structural phase transitions can be studied by a variety of techniques; macroscopic fields, X-ray, light and neutron diffraction, and resonance methods. The information which can be obtained by these different techniques about the order parameter and susceptibility at structural phase transitions is described and compared. Landau theory coupled with the 'sot~ mode' concept provides a simple pic...
متن کاملUltrasonic Studies of Phase Transitions
Ultrasonic s t u d i e s of phase t r a n s i t i o n s and of some r e l a t e d phenomena i n various systems a r e b r i e f l y reviewed. The responses of high frequency < u l t r a s o n i c ) s t r e s s waves t o order parameter changes and t o p r e t r a n s i t i o n a l f luc tua t ions a r e discussed. lhphasis is given t o recent inves t iga t ions of anharmonic e f f e c t s i n u...
متن کاملAthermal character of structural phase transitions.
The significance of thermal fluctuations in nucleation in structural first-order phase transitions has been examined. The prototypical case of martensitic transitions has been experimentally investigated by means of acoustic emission techniques. We propose a model based on the mean first-passage time to account for the experimental observations. Our study provides a unified framework to establi...
متن کاملExploring structural phase transitions of ion crystals
Phase transitions have been a research focus in many-body physics over past decades. Cold ions, under strong Coulomb repulsion, provide a repealing paradigm of exploring phase transitions in stable confinement by electromagnetic field. We demonstrate various conformations of up to sixteen laser-cooled (40)Ca(+) ion crystals in a home-built surface-electrode trap, where besides the usually menti...
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ژورنال
عنوان ژورنال: Acta Crystallographica Section A Foundations of Crystallography
سال: 1981
ISSN: 0108-7673
DOI: 10.1107/s0108767381096645