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Raman spectroscopy of Zn1-xCoxO bulk mixed crystals

Szuszkiewicz W, Morhange J F, Schumm M, Lentze M, Gołacki Z, Skupiński P, Grasza K, Geurts J

Materials Science Poland

2008

Vol. 26, No. 4

1045--1052

We report on a study of structural properties of Zn1-xCoxO by micro- and macro-Raman scattering from phonons. Bulk mixed crystals (x ≤ 0,03), grown by chemical vapour transport were investigated between 5 K and 295 K. Beside the common eigenmodes of the ZnO host lattice, we observed disorder-induced lattice vibration modes and a structure, tentatively assigned to a local vibration mode of the Co impurity. Our results are compared with literature data of other ZnO-based diluted magnetic semiconductors such as (Zn,Mn)O.