Applied Physics A

, Volume 115, Issue 3, pp 997–1001 | Cite as

Room temperature ferromagnetism of amorphous MgO films prepared by pulsed laser deposition

Article

Abstract

Amorphous MgO thin films were prepared by pulsed laser deposition (PLD) under various oxygen pressures. The structural, magnetic, and optical properties of the films were investigated. All as-deposited samples exhibit room temperature ferromagnetism, which depend strongly on oxygen pressure. It is found that the saturation magnetization (Ms) initially increases with the oxygen pressure, the maximum Ms of 8.57 emu/cm3 is obtained for the MgO film deposited under an oxygen pressure of 2 mTorr. However, the Ms significantly reduces at higher oxygen pressures. Further X-ray photoelectron spectroscopy and photoluminescence demonstrate that the long-range magnetic order in amorphous MgO films can be attributed to the nonstoichiometry effect and the presence of Mg vacancies.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.State Key Laboratory of Silicon Materials, Department of Materials Science and EngineeringZhejiang UniversityHangzhouChina
  2. 2.Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuZhouChina
  3. 3.National Laboratory of Solid State MicrostructuresNanjing UniversityNanjingChina

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