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Study Of Soft Modes Using Infrared And Optic Techniques

M. E. LINES and A. M. GLASS

in Principles and Applications of Ferroelectrics and Related Materials

Published in print:
2001
Published Online:
February 2010
ISBN:
9780198507789
eISBN:
9780191709944
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780198507789.003.0007
Subject:
Physics, Condensed Matter Physics / Materials

Lattice vibrations which involve a fluctuating electric dipole have quite different properties from non-polar vibrations. In particular, they couple directly via the dipole moment to the radiation ... More


Coupling To The Soft Mode

M. E. LINES and A. M. GLASS

in Principles and Applications of Ferroelectrics and Related Materials

Published in print:
2001
Published Online:
February 2010
ISBN:
9780198507789
eISBN:
9780191709944
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780198507789.003.0010
Subject:
Physics, Condensed Matter Physics / Materials

Near the temperature of a second-order structural phase transition, and in particular near the Curie point of a ferroelectric, anomalously strong ultrasonic absorption occurs. This chapter considers ... More


Principles and Applications of Ferroelectrics and Related Materials

M. E. Lines and A. M. Glass

Published in print:
2001
Published Online:
February 2010
ISBN:
9780198507789
eISBN:
9780191709944
Item type:
book
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780198507789.001.0001
Subject:
Physics, Condensed Matter Physics / Materials

The book develops the modern theory of ferroelectricity in terms of soft modes and lattice dynamics and also describes modern techniques of measurement, including X-ray, optic, and neutron ... More


Critical Phenomena

M. E. LINES and A. M. GLASS

in Principles and Applications of Ferroelectrics and Related Materials

Published in print:
2001
Published Online:
February 2010
ISBN:
9780198507789
eISBN:
9780191709944
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780198507789.003.0011
Subject:
Physics, Condensed Matter Physics / Materials

Critical phenomena occur very close to a second-order phase transition. For example, a ferromagnet near its Curie point behaves quite similarly to a liquid near its critical point, and a ... More


Structural Crystallography and Phase Transitions

M. E. LINES and A. M. GLASS

in Principles and Applications of Ferroelectrics and Related Materials

Published in print:
2001
Published Online:
February 2010
ISBN:
9780198507789
eISBN:
9780191709944
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780198507789.003.0006
Subject:
Physics, Condensed Matter Physics / Materials

This chapter discusses structural crystallography and phase transitions. If all atoms in a crystal were exactly at their official lattice sites and there were no order-disorder ambiguity as to the ... More


Basic Concepts

M. E. LINES and A. M. GLASS

in Principles and Applications of Ferroelectrics and Related Materials

Published in print:
2001
Published Online:
February 2010
ISBN:
9780198507789
eISBN:
9780191709944
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780198507789.003.0001
Subject:
Physics, Condensed Matter Physics / Materials

This book looks at some concepts leading to a basic understanding of ferroelectricity. Depending on their geometry, crystals are commonly classified into seven systems: triclinic (the least ... More


Statistical Theory, Soft Modes, And Phase Transitions

M. E. LINES and A. M. GLASS

in Principles and Applications of Ferroelectrics and Related Materials

Published in print:
2001
Published Online:
February 2010
ISBN:
9780198507789
eISBN:
9780191709944
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780198507789.003.0002
Subject:
Physics, Condensed Matter Physics / Materials

In order to acquire a simple physical picture of the dynamic mechanism of a phase transition it is necessary to use the simplest of many-body approximations. It is instructive, in particular, to ... More


The jamming scenario—an introduction and outlook

Andrea J. Liu, Sidney R. Nagel, Wim van Saarloos, and Matthieu Wyart

in Dynamical Heterogeneities in Glasses, Colloids, and Granular Media

Published in print:
2011
Published Online:
September 2011
ISBN:
9780199691470
eISBN:
9780191729799
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199691470.003.0009
Subject:
Physics, Theoretical, Computational, and Statistical Physics

The jamming scenario of disordered media, formulated about ten years ago, has in recent years been advanced by analyzing model systems of granular media. This has led to various new concepts that are ... More


Metals and alloys

Rolf Hempelmann

in Quasielastic Neutron Scattering and Solid State Diffusion

Published in print:
2000
Published Online:
January 2010
ISBN:
9780198517436
eISBN:
9780191706974
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780198517436.003.0009
Subject:
Physics, Condensed Matter Physics / Materials

For the fcc noble metals and for bcc metals of group V and VI such as Mo, W, V, and Nb, atomic diffusion is slow compared to the case of bcc alkali metals Li, Na, or K. The group IV metals Ti, Zr, ... More


Symmetry relations at phase transitions

Ulrich Müller

in Symmetry Relationships between Crystal Structures: Applications of Crystallographic Group Theory in Crystal Chemistry

Published in print:
2013
Published Online:
December 2013
ISBN:
9780199669950
eISBN:
9780191775086
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199669950.003.0015
Subject:
Physics, Crystallography, Condensed Matter Physics / Materials

Phase transitions in the solid state are classified as being continuous or discontinuous. According to Landau theory, continuous phase transitions require that there is a group-subgroup relation ... More


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