Open AccessInfluence of annealing on the properties of Mn and N co-doped Zn0.88Mn0.12O:N films
Author(s) -
Qiu Dong-Jiang,
Jun Wang,
Ding Kou-Bao,
Hongjun Shi,
Jie Yin
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.5249
Subject(s) - materials science , annealing (glass) , ferromagnetism , wurtzite crystal structure , hall effect , magnetization , electron beam physical vapor deposition , magnetic semiconductor , diffraction , thin film , analytical chemistry (journal) , doping , condensed matter physics , electrical resistivity and conductivity , nanotechnology , optics , magnetic field , optoelectronics , composite material , zinc , metallurgy , chemistry , physics , quantum mechanics , chromatography
Mn and N codoped ZnO (or Zn1-xMnxO:N) films were grown on Si(001) and quartz substrates via reactive electron beam evaporation in the NH3 atmosphere. The growth temperature was 300℃. The as-grown Zn0.88Mn0.12O:N film was cut into two pieces and one of them was then annealed in O2 atmosphere at 400℃ for 30 min. X-ray diffraction measurements reveal that Zn0.88Mn0.12O or Zn0.88Mn0.12O:N films have the single-phase wurtzite structure. The (002) diffraction peak of Zn0.88Mn0.12O:N film is located at a smaller angle and has a wider line width compared with that of Zn0.88Mn0.12O film. Hall measurement shows that the as-grown Zn0.88Mn0.12O:N film is the n-type and changes to p-type after annealing. DC magnetization analysis shows that the as-grown Zn0.88Mn0.12O:N films are ferromagnetic at room temperature (RT) but the ferromagnetism (FM) is weak and unstable. However, the FM of Zn0.88Mn0.12O:N film at RT is remarkably enhanced and its stability efficiently improved by annealing in O2 atmospher. The origin of FM of Zn0.88Mn0.12O:N film at RT, as well as the mechanisms of its FM enhancement and stability improvement by annealing are discussed.