EPR spectroscopy of weak exchange interactions between Co.sup.2+./sup. ions in ZnO

0359525 - FZÚ 2012 RIV DE eng J - Článek v odborném periodiku
Azamat, Dmitry - Dejneka, Alexandr - Trepakov, Vladimír - Jastrabík, Lubomír - Fanciulli, M. - Ivanov, V.Y. - Godlewski, M. - Sokolov, V.I. - Rosa, Jan - Badalyan, A. G.
EPR spectroscopy of weak exchange interactions between Co²⁺ ions in ZnO.
Physica Status Solidi. Roč. 5, č. 4 (2011), s. 138-140. ISSN 1862-6254. E-ISSN 1862-6270
Grant CEP: GA ČR GC202/09/J017; GA AV ČR KAN301370701; GA MŠMT(CZ) 1M06002
Výzkumný záměr: CEZ:AV0Z10100522
Klíčová slova: transition metals * EPR * ZnO * exchange interactions
Kód oboru RIV: BH - Optika, masery a lasery
Impakt faktor: 2.218, rok: 2011

Electron paramagnetic resonance (EPR) is used to identify the next nearest neighbour Co²⁺ pairs coupled by spin–spin interaction in Co-doped ZnO single crystals grown by the hydrothermal technique. These dimer centers are described by a spin Hamiltonian with exchange coupling terms written as interaction between identical effective spins Seff = 1/2 of the lowest ground state Kramers doublets of the two Co²⁺ ions.The exchange parameters of weakly ferromagnetically coupled next nearest neighbor Co²⁺ pairs are estimated.
Trvalý link: http://hdl.handle.net/11104/0197301