Lukashov D. Mossbauer studies of local magnetic ordering in high-TC superconducting compound YBa2(Cu1-x57Fex)3O6+delta

Українська версія

Thesis for the degree of Candidate of Sciences (CSc)

State registration number

0400U002790

Thesis Registration Form

0400U002790.pdf

Applicant for

Specialization

  • 01.04.11 - Магнетизм

10-10-2000

Specialized Academic Board

К64.175.03

Essay

Objtcts: HTSC compound YBa2(Cu1-x57Fex)3O6+delta. Goals: To determine experimentaly local field parameters at 57Fe nuclei in wide temperature range with the aim to find out the mechanism of magnetic ordering in this material and to investigate photoradiation influence on HTSC samples by Mossbauer spectroscopy. Mtsods: Mossbauer spectroscopy. New results: 57Fe-site assignments were carried out in YBa2(Cu1-x57Fex)3O6+delta. An anisotropy of mean square atom displacements was detected in Cu(1) sites. An anomaly decrease of Mossbauer spectra resonant area was observed for superconducting samples at T<80 K. The effect were connected with the local magnetic ordering in some sites. The photoinduced changes of YBa2(Cu1-x57Fex)3O6+delta Mossbauer spectra were indicated.

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