Spin-lattice relaxation processes of transition metal ions in a heavily cobalt doped ZnO: Phonon heating effect

0511114 - FZÚ 2020 RIV US eng J - Journal Article
Azamat, Dmitry - Badalyan, A. G. - Baranov, P. G. - Fanciulli, M. - Lančok, Ján - Hrabovský, M. - Jastrabík, Lubomír - Dejneka, Alexandr
Spin-lattice relaxation processes of transition metal ions in a heavily cobalt doped ZnO: Phonon heating effect.
Journal of Applied Physics. Roč. 126, č. 12 (2019), s. 1-7, č. článku 123903. ISSN 0021-8979. E-ISSN 1089-7550
R&D Projects: GA MŠMT EF16_013/0001406; GA MŠMT(CZ) LM2015088
Grant - others:OP VVV - SAFMAT(XE) CZ.02.1.01/0.0/0.0/16_013/0001406
Institutional support: RVO:68378271
Keywords : electron-spin echo detection * spin-lattice relaxation * Cobalt doped ZnO single crystals
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 2.286, year: 2019
Method of publishing: Limited access
https://doi.org/10.1063/1.5088588

Inversion recovery with electron spin-echo detection has been used to study the electron spin-lattice relaxation rates 1/T1 for transition metal impurities in heavily cobalt-doped hydrothermally grown ZnO single crystals. The relaxation dynamics of Co2+ ions dominates the phonon bottleneck effect in the Orbach-Aminov process, which involves the modulation of the zero-field-splitting tensor. The relaxation mechanism may be treated in terms of phonon heating with fast rate of energy pump from Co2+ spins into the lattice phonon modes. The measurements reveal the cross-relaxation process in which the single Co2+ ions cross-relax to exchange-coupled clusters of cobalt ions.
Permanent Link: http://hdl.handle.net/11104/0301434