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 - Článek v odborném periodiku
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
Grant CEP: GA MŠMT(CZ) LO1409; GA MŠMT(CZ) LM2015088; GA AV ČR(CZ) Fellowship J. E. Purkyně; GA ČR(CZ) GA14-30062S
Grant ostatní: FUNBIO(XE) CZ.2.16/3.1.00/21568; AV ČR(CZ) Fellowship J. E. Purkyně
Program: Fellowship J. E. Purkyně
Institucionální podpora: RVO:68378271
Klíčová slova: topological insulators * magnetism * ferromagnetic resonance * magneto-crystalline anisotropy * critical scaling * SQUID
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 1.874, rok: 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.
Trvalý link: http://hdl.handle.net/11104/0284523