Shabakayeva Y. Hysteretic and magnetostriction effects in niobium diselenide single crystals

Українська версія

Thesis for the degree of Candidate of Sciences (CSc)

State registration number

0405U003606

Thesis Registration Form

0405U003606.pdf

Applicant for

Specialization

  • 01.04.07 - Фізика твердого тіла

20-09-2005

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: magnetostriction effects in anisotropic materials. Goals: search of the magnetostriction effects manifestation in 2H-NbSe2 at low temperatures under magnetic fields and detection of their correlation with structural and electronic peculiarities of this compound. Method: capacitance technique, torque measurement technique. New results: Magnetostriction measurements 2H-NbSe2 single crystals are reported. Magnetostriction measurements in the mixed state have revealed its irreversible dependence on magnetic field, "peak-effect", similar to that of magnetization, oscillatory part below and above the field of peak-effect and monotonic reversible component. Comparison of the obtained results with magnetization measurements allows one to analyze variety of the processes in the mixed state of anisotropic superconductor, including peculiarities of the Fermi surface shape below charge density wave transition and its pressure dependence, transformations in the structure of vortex matter, appearance of transverse component of magnetization in tilted fields.

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