Specialization: 011200 Physics 
Program: Neutron and Synchrotron physics
Program manager: Associate professor, Dr. N.A. Grigorieva
Department of Nuclear-Physics Research Methods
Supervisor: Associate professor, Dr. Zobkalo I.A.
Referee: Prof. Dr. A.I. Kurbakov

Neutron scattering investigation of the magnetic phases in multiferroic 
TbxCe1-xMn2O5
Dimakova Elizaveta
The investigations of the temperature evolution of magnetic structure of multiferroics single crystals Tb0.8Ce0.2Mn2O5 and TbMn2O5 were performed. By polarized neutron scattering it is shown that in all magnetically ordered phases the non-equal population of domains with "right" and "left" spirals does exist. It is shown that for Tb0.8Ce0.2Mn2O5 – in all magnetic phases and for TbMn2O5 – in low-temperature incommensurate and in commensurate  magnetic phases – the orientation of the plane of rotation of the magnetic moments remains the same and makes an angle of     ~10° with the (ab) crystal plane. But in at the transition to high-temperature incommensurate magnetic phase in TbMn2O5 the orientation transition takes place. The crystal structure of single crystal Tb0.8Ce0.2Mn2O5 for Т=2К, 10К, 60K is refined. The magnetic structure Tb0.8Ce0.2Mn2O5 for T = 28 K is obtained.
Publications:
1.	E. Dimakova, I. Zobkalo, V.Polyakov and S.Gavrilov «On the magnetic structure of multiferroics EuMn2O5, Tb1-x CexMn2O5: XYZ-polarization analysis». // International Conference on Neutron Scattering ICNS-2013 Edinburg 8 – 12 July 2013, Poster Session C, P165.
2.	E. K. Dimakova, I.A. Zobkalo, V.A. Polyakov and S.V. Gavrilov. “The investigation of magnetic structure of the multiferroics EuMn2O5, Tb1-xCexMn2O5 (x=0, 0.2) by neutron XYZ-polarization analysis”. // 47th PNPI Winter School on Physics of Condensed State. Zelenogorsk, Russia, 11th  – 16th March 2013, Abstract book.
3.	E. K. Dimakova, S.V. Gavrilov, I.A. Zobkalo. “The investigation of magnetic structure of the multiferroics Tb1-xCexMn2O5 (x=0, 0.2) by neutron XYZ-polarization analysis”. // School of Modern Neutronography. Dubna, Russia, 28th October – 1st November 2013, Abstract book.
4.	E. K. Dimakova, I.A. Zobkalo. “XYZ-polarization analysis for non-collinear magnetic structures investigations”. School on Polarized Neutrons. Peterhof, Russia, 23th  – 24th December 2013, Abstract book.
5.	I.A.Zobkalo, S.V.Gavrilov, E.K.Dimakova, E.I.Golovenchits, V.A.Sanina «On the magnetic structure of multiferroics Tb1-x CexMn2O5 (x=0, 0.2) : XYZ-polarization analysis» // Journal of Surface Investigation. X-ray, Synchrotron and Neutron Techniques, 2014, in press.