TITLE:
XANES and XPS Study on Microstructure of Mn-Doped ZnO Films
AUTHORS:
B. Zhang, M. Li, J. Z. Wang, L. Q. Shi, H. S. Cheng
KEYWORDS:
ZnO-Based DMS; Mn Substitution; XANES; XPS
JOURNAL NAME:
Materials Sciences and Applications,
Vol.4 No.5,
May
21,
2013
ABSTRACT: Microstructure of ZnO:Mn films with various Mn concentration was investigated with XANES and XPS. The experimental results revealed a substitution of Mn in ZnO and also excluded the existence of Mn oxides or metallic manganese clusters. The substitutional Mn presented a divalent state and all the ZnO:Mn films were n-type. Room temperature ferromagnetism monotonously decreases with the decrease of the electron carrier concentration. The observed ferrmagnetism should come from the carrier-mediated exchange.