Effects of high-temperature annealing on magnetic properties of (Zn0.91Mn0.09)O thin films grown by RF magnetron sputtering
- Authors
- Lee, Sejoona; Lee, Hye-sung; Hwang, Sun-jae; Shon, Yoon; Kang, Taewon Wang; Kim, Deuk Young; Kim, Eunkyu
- Issue Date
- Jan-2006
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- ZnMnO; nano-island; high-temperature annealing; room temperature ferromagnetism
- Citation
- MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, v.126, no.2-3, pp.300 - 305
- Indexed
- SCIE
SCOPUS
- Journal Title
- MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY
- Volume
- 126
- Number
- 2-3
- Start Page
- 300
- End Page
- 305
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/181888
- DOI
- 10.1016/j.mseb.2005.12.007
- ISSN
- 0921-5107
- Abstract
- The (Zn0.91Mn0.09)O thin film annealed at 1000 degrees C for 60 min in N-2 atmosphere showed two kinds of Curie temperature (T-C) values of T-C1 around 130 K and T-C2 above 300 K while the as-grown (Zn0.91Mn0.09)O thin film showed typical ferromagnetism with the T-C of 108 K. It is expected that the increase of T-C up to T-C1 might be attributed to the enhancement of crystal magnetic anisotropy because the increases of (0001) peak for X-ray diffraction patterns and Mn2+-related emission for photoluminescence spectra were observed for annealed (Zn0.91Mn0.09)O thin films. The increase of T-C above T-C2 might be originated from the formation of nano-sized (Zn0.91Mn0.09)O islands because it was confirmed that the nano-sized (Zn(0.91)Mno(0.09))O islands were formed after annealing treatment and that they revealed clearly the magnetic domains at 300 K for the measurements of atomic force microscopy and magnetic force microscopy, respectively. The room temperature ferromagnetism in the nano-sized (Zn0.91Mn0.09)O islands is considered to be originated from the inhomogeneous distribution of Mn ions.
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