Pulse-electron paramagnetic resonance of Cr.sup.3+./sup. centers in SrTiO.sub.3./sub..

0393324 - FZÚ 2014 RIV US eng J - Článek v odborném periodiku
Azamat, Dmitry - Dejneka, Alexandr - Lančok, Ján - Trepakov, Vladimír - Jastrabík, Lubomír - Badalyan, A. G.
Pulse-electron paramagnetic resonance of Cr³⁺ centers in SrTiO₃.
Journal of Applied Physics. Roč. 113, č. 17 (2013), "174106-1"-"174106-6". ISSN 0021-8979. E-ISSN 1089-7550
Grant CEP: GA MŠMT(CZ) LM2011029; GA TA ČR TA01010517; GA ČR GAP108/12/1941
Grant ostatní: SAFMAT(XE) CZ.2.16/3.1.00/22132
Institucionální podpora: RVO:68378271
Klíčová slova: pulse-electron paramagnetic resonance * Cr3+ centers in SrTiO₃
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 2.185, rok: 2013

Electron paramagnetic resonance on chromium doped SrTiO3 samples grown using the Verneuil technique shows the presence of charge-compensated Cr3+-Vo as one of the dominant chromium centers. The spin-lattice relaxation processes have been investigated in samples with both isotropic Cr3+ and Cr3+-Vo centers in heavily doped SrTiO3. The relaxation of longitudinal magnetization was dominated by the sum of two exponentials with two time constants (i.e., a slow and a fast constant) at liquid-helium temperatures. The results of fitting the temperature variation of T1 suggest that the dominant exponential contribution is related to the spin-phonon relaxation time arising from the local phonon mode.
Trvalý link: http://hdl.handle.net/11104/0222058