Local vibrational modes competitions in Mn-doped ZnO epitaxial films with tunable ferromagnetism | Zendy

Qiang Cao | Zendy; Maoxiang Fu | Zendy; Guolei Liu | Zendy; Huaijin Zhang | Zendy; Shishen Yan | Zendy; Yanxue Chen | Zendy; Liangmo Mei | Zendy; Jun Jiao | Zendy

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Local vibrational modes competitions in Mn-doped ZnO epitaxial films with tunable ferromagnetism

Author(s) -

Qiang Cao,

Maoxiang Fu,

Guolei Liu,

Huaijin Zhang,

Shishen Yan,

Yanxue Chen,

Liangmo Mei,

Jun Jiao

Publication year - 2014

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.4885735

Subject(s) - ferromagnetism , raman spectroscopy , molecular beam epitaxy , dopant , materials science , vacancy defect , doping , annealing (glass) , acceptor , molecular vibration , raman scattering , epitaxy , analytical chemistry (journal) , chemistry , crystallography , optoelectronics , condensed matter physics , nanotechnology , optics , physics , layer (electronics) , composite material , chromatography

We reported spectroscopic investigations of high quality Mn-doped ZnO (ZnMnO) films grown by oxygen plasma-assisted molecular beam epitaxy. Raman scattering spectra revealed two local vibrational modes (LVMs) associated with Mn dopants at 523 and 712 cm−1. The LVMs and magnetic properties of ZnMnO films can be synchronously modulated by post annealing processing or by introducing tiny Co. The relative intensity of two LVMs clearly shows competitions arising from uncompensated acceptor and donor defects competition for ferromagnetic and nonmagnetic films. The experimental results indicated that LVM at 523 cm−1 is attributed to Mn—(Zinc-vacancy) complexes, while LVM at 712 cm−1 is attributed to Mn—(Oxygen-vacancy) complexes.

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