Supervisor:

Kichanov Sergey

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+7 (496) 216-35-79

Scientific installation:

IBR-2 high flux pulce reactor, DN-6 and DN-12 diffractometer.

Level:

Master

Language:

Russian or English

Statement of the problem:

The application of high pressure causes changes in the unit cell parameters of the compounds, which causes changes in the physical properties of the materials. The low dimensional spin chain magnetic systems exhibit a rich variety of challenging physical phenomena like quantum critical point, Bose-Einstein condensation, Haldane gap excitations, exotic magnetic ground states, formation of magnetization plateaus in external magnetic fields, multiferroicity, which are at the current focus of the extensive research. Due to the different crystalline electric field splittings, the Co3+(I) and Co3+(II) ions with the octahedral the triangular base prism oxygen coordination have the low spin state LS (S = 0) and the high spin state HS (S = 2), respectively. Further important insight in exploration of particular factors responsible for a complex physical phenomenon observed in Ca3Co2O6 and underlying structure-properties relationships can be achieved by high pressure studies, mediating competing interactions by modifications of interatomic distances and angles. It is proposed to investigate the effect of pressure on the crystalline and magnetic structure of complex cobalt oxides using neutron and X-ray diffraction methods.

Objective:

It is proposed to study the features of the internal structure of massive metal samples using neutron tomography and diffraction methods.

Tasks:

1. Collecting information about the object under study, methods of neutron research, data analysis, software tools for data analysis.

2. Conducting investigations of metal archaeological objects using neutron tomography and diffraction methods.

3. Reconstruction of a three-dimensional model from neutron tomography data, analysis of the resulting model. Analysis of diffraction data.

4. Preparation of the qualification work based on the research results.