Zvyagina G. Elastic properties of ferroelastics in the vicinity of phase transitions

Українська версія

Thesis for the degree of Candidate of Sciences (CSc)

State registration number

0404U004212

Thesis Registration Form

0404U004212.pdf

Applicant for

Specialization

  • 01.04.07 - Фізика твердого тіла

05-10-2004

Specialized Academic Board

Д 64.175.03

B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine

Essay

Object - ferroelastic phase transitions in double molibdates and cuprates of rare-earth and transition elements; goal -the analysis of mechanisms and characters of ferroelastic phase transitions occursing in this layered compounds; method - pulsing ultrasonic; results and novelty -elastic properties KSc(MoО4)2, СsDу1-xGdx(MoО4)2, KEr(MoО4)2 and Nd2-xCexCuО4 in a broad range of temperatures and magnetic fields were investigated, and the analysis of features of the be-havior of those compounds at ferroelastic phase transitions was performed. The phase diagram "concentration of rare-earth ions-temperature" for of crystals СsDу1-xGdx(MoО4)2 was con-structed. For the first time spontaneous and magnetic field-induced phase transitions at low temperatures in Nd2-xCexCuО4 were found. Phase diagrams "magnetic field-temperature" were constructed for a pure crystal and doped ones; employment - investigation of fundamental physical properties, new ferroelastic materials.

Read more

Files

AREF.doc

DISSER-GLAVA1.doc

DISSER-GLAVA2.doc

DISSER-GLAVA3.doc

DISSER-GLAVA4.doc

DISSER-GLAVA5.doc

DISSER-literatura.doc

DISSER-vvedenie.doc

DISSER-vyvody.doc

Similar theses

0424U000081

Igor G. Churilov

Peculiarities of thermal influence on morphological changes and the mechanism of liquid phase formation in condensed one-component films (Pb, Sn, In, Bi) and in binary layered films (Bi/Sn, Pb/Sn, Pb/In)

0424U000065

Mazur Dmytro V.

X-ray absorption and magnetic circular dichroism spectra features in compounds containing oxygen and based on 4th period metals

0523U100214

Serhii V. Oliinyk

Physical basis of formation of electrical and photoelectric properties of AIIBVI crystals and electrical properties of multicomponent coatings

0522U100045

Bohdanov Yevhen Ivanovych

Effects of azimuthal asymmetry of radiation scattering in crystals and new possibilities of diffuse-dynamical diffractometry

0522U100002

Vladymyrskyi Igor A.

Thermally-induced structural phase transitions in heterogeneous systems based on magnetic and nonmagnetic nanolayers