Local moment formation and magnetic coupling of Mn dopants in Bi.sub.2./sub.Se.sub.3./sub.: a low-temperature ferromagnetic resonance study

0490258 - FZÚ 2019 RIV NL eng J - Journal Article
Savchenko, Dariia - Tarasenko, R. - Vališka, M. - Kopeček, Jaromír - Fekete, Ladislav - Carva, K. - Holý, V. - Springholz, G. - Sechovský, V. - Honolka, Jan
Local moment formation and magnetic coupling of Mn dopants in Bi₂Se₃: a low-temperature ferromagnetic resonance study.
Physica B-Condensed Matter. Roč. 536, May (2018), s. 604-613. ISSN 0921-4526. E-ISSN 1873-2135
R&D Projects: GA MŠMT(CZ) LO1409; GA MŠMT(CZ) LM2015088; GA AV ČR(CZ) Fellowship J. E. Purkyně; GA ČR(CZ) GA14-30062S
Grant - others:FUNBIO(XE) CZ.2.16/3.1.00/21568; AV ČR(CZ) Fellowship J. E. Purkyně
Program: Fellowship J. E. Purkyně
Institutional support: RVO:68378271
Keywords : topological insulators * magnetism * ferromagnetic resonance * magneto-crystalline anisotropy * critical scaling * SQUID
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 1.874, year: 2018

We compare the magnetic and electronic configuration of single Mn atoms in molecular beam epitaxy (MBE) grown Bi2Se3 thin films, focusing on electron paramagnetic (ferromagnetic) resonance (EPR and FMR, respectively) and superconducting quantum interference device (SQUID) techniques. X-ray diffraction (XRD) and electron backscatter diffraction (EBSD) reveal the expected increase of disorder with increasing concentration of magnetic guest atoms, however, Kikuchi patterns show that disorder consists majorly of mu m-scale 60 degrees twin domains in the hexagonal Bi2Se3 structure, which are promoted by the presence of single unclustered Mn impurities.
Permanent Link: http://hdl.handle.net/11104/0284523