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Structural and magnetic properties of Ni1-xFex O thin films synthesized by pulsed laser deposition

Weng Wei-Xiang Yan Wen-Sheng Sun Zhi-Hu Yao Tao Guo Yu-Xian Wang Feng Wei Shi-Qiang Zhang Guo-Bin Xu Peng-Shou

Structural and magnetic properties of Ni1-xFex O thin films synthesized by pulsed laser deposition

Weng Wei-Xiang, Yan Wen-Sheng, Sun Zhi-Hu, Yao Tao, Guo Yu-Xian, Wang Feng, Wei Shi-Qiang, Zhang Guo-Bin, Xu Peng-Shou
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  • Received Date:  07 December 2007
  • Accepted Date:  14 January 2008
  • Published Online:  20 September 2008

Structural and magnetic properties of Ni1-xFex O thin films synthesized by pulsed laser deposition

  • 1. 中国科学技术大学国家同步辐射实验室,合肥 230029

Abstract: Pulsed laser deposition (PLD) method was used to fabricate Ni1-xFexO (x=0.02,0.05) dilute magnetic semiconductor thin films with room temperature ferromagnetism. For the Ni0.98Fe0.03O sample with a lower Fe content,the crystalline structures of the Ni1-xFexO films are of the NaCl type as determined by X-ray diffraction. For the Ni0.95Fe0.05O sample with a higher Fe content,some additional weak diffraction peaks corresponding to α-Fe2O3 phase can be observed. From the X-ray absorption near edge structure (XANES) and X-ray photoelectron spectroscopy (XPS), it is shown that the doped Fe impurities in Ni0.98Fe0.02O are substitutionally incorporated into the NiO host and no secondary phases with room temperature ferromagnetism are found. These results show the intrinsic ferromagnetism of the Ni1-xFexO samples.

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