Magnetic Bulk- and Nano-materials

Staff

Prof. dr hab. Czesław Kapusta
Dr. Ewa Japa
M.Sc.eng. Andrzej Lemański
Dr. Janusz Przewoźnik
Dr.eng. Marcin Sikora
Dr. Jan Żukrowski

PhD students

M.Sc.eng.Marta Borowiec
M.Sc.eng. Jan Michalik
M.Sc.eng. Damian Rybicki
M.Sc.eng. Wojciech Szczerba
M.Sc.eng. Dariusz Zając

International collaboration

Grants

Recent Publications

Research Subjects

1. Magnetic and electronic properties of perovskites studied with NMR, Mossbauer Effect and
synchrotron radiation: X-MCD (XANES), EXAFS (magnetic EXAFS)

Materials studied: colossal magnetoresistive" manganites, double perovskites, Ruthenium-hybrid cuprates Problems: charge- and spin dynamics, electronic and magnetic phase segregation, spin- and orbital moments of individual elements, influence of hydrostatic pressure and relation to the bulk magnetic and electronic transport properties of bulk samples and thin films.

2. Individual site magnetic properties of expanded lattice intermetallics: RE - 3d compounds
containing light interstitial elements H, N, C

Materials studied: RE₂Fe₁₇(N,C,H)_x and RE₂Fe₁₄BH_x permanent magnet materials,
REFe₂Hx and REMn₂H_x compounds Problems: individual site electronic and magnetic properties: magnetic moments and their coupling, individual site contributions to the magnetocrystalline anisotropy, impact of light interstitial atoms on these properties, influence of hydrostatic pressure and relation to the bulk magnetic and anisotropic properties.

Equipment

NMR spectrometer 1-600 MHz for study of magnetic materials, 7 Tesla superconducting magnet, Access to synchrotron light: HASYLAB
Mossbauer spectrometers (constant acceleration) with
- continuous flow cryostat (4.2K ¸ 300K)
- closed cycle refrigerator (15K ¸ 300K)
- high temperature furnace for Mossbauer spectroscopy (300K ¸ 1100K)
- top loading cryostat (4.2K ¸ 300K)
- arc melting furnace
- isotopes: ⁵⁷Fe, ¹¹⁹Sn, ¹⁵¹Eu, ¹⁶¹Dy, ¹⁶⁹Tm
- cryostat for measurements with cooled source: ¹⁵⁵Gd