High-frequency electron paramagnetic resonance investigationof Mn.sup.3+./sup. centers in SrTiO.sub.3./sub..

0377609 - FZÚ 2013 RIV GB eng J - Journal Article
Azamat, Dmitry - Badalyan, A. G. - Dejneka, Alexandr - Trepakov, Vladimír - Jastrabík, Lubomír - Frait, Zdeněk
High-frequency electron paramagnetic resonance investigationof Mn³⁺ centers in SrTiO₃.
Journal of Physics and Chemistry of Solids. Roč. 73, č. 7 (2012), s. 822-826. ISSN 0022-3697. E-ISSN 1879-2553
R&D Projects: GA ČR GC202/09/J017; GA ČR GAP108/12/1941; GA MŠMT(CZ) LM2011029
Grant - others:GA ČR(CZ) CZ.2.16/3.1.00/22132
Institutional research plan: CEZ:AV0Z10100520
Keywords : electron paramagnetic resonance * SrTiO₃ doped with Mn * Jahn–Teller centers
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 1.527, year: 2012

A high-frequency (49 and 70 GHz) electron paramagnetic resonance (EPR) study is reporHted on SrTiO3 single crystals doped with 0.5-at% of manganese. EPR spectra originating from the S=2 ground state of Mn3+ ions are shown to belong to the different types of Jahn–Teller centers that arise as a result of varied ordering of the oxygen vacancies due to the reducing process.The present results indicate the strong covalent reduction of the density of unpaired spins (Fermi term) at the manganese nucleus for the various types of centers.
Permanent Link: http://hdl.handle.net/11104/0007017