EFFECTS OF TREATMENT TEMPERATURE ON THE MICROSTRUCTURE AND MAGNETIC PROPERTIES OF Fe-N THIN FILMS

金属学报(英文版), 2007, 20(4): 293-300.

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1.Department of Applied Physics, Institute of Advanced Materials Physics, School of Science, Tianjin University, Tianjin 300072, China;Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Tianjin University, Tianjin 300072, China

2.Department of Applied Physics, Institute of Advanced Materials Physics, School of Science, Tianjin University, Tianjin 300072, China;Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Tianjin University, Tianjin 300072, China

3.Department of Applied Physics, Institute of Advanced Materials Physics, School of Science, Tianjin University, Tianjin 300072, China;Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Tianjin University, Tianjin 300072, China

4.Department of Applied Physics, Institute of Advanced Materials Physics, School of Science, Tianjin University, Tianjin 300072, China;Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Tianjin University, Tianjin 300072, China

5.Department of Applied Physics, Institute of Advanced Materials Physics, School of Science, Tianjin University, Tianjin 300072, China;Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Tianjin University, Tianjin 300072, China

6.Department of Applied Physics, Institute of Advanced Materials Physics, School of Science, Tianjin University, Tianjin 300072, China;Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Tianjin University, Tianjin 300072, China

基金项目: 国家自然科学基金(50674071) the Platform Project of Tianjin for Innovation in Science and Technology and Environmental Construction(06TXTJJC13900) 天津市自然科学基金(06YFJZJC01300) he Pro gram for New Century Excellent Talents in University(NCET-06-0245)

EFFECTS OF TREATMENT TEMPERATURE ON THE MICROSTRUCTURE AND MAGNETIC PROPERTIES OF Fe-N THIN FILMS

Keywords： Fe-N thin film

Fe-N thin films were fabricated on both 100Si and NaCl substrates by RF magnetron sputtering under low nitrogen partial pressure. The microstructure and magnetic properties of Fe-N thin films were investigated with the increase of the substrate temperature (Ts) and the annealing temperature (Ta). It is more difficult for nitrogen atoms to enter the Fe lattice under higher Ts above 150℃. The phase evolution is visible at higher Tα above 200℃. The phase transformation of α"-Fe16N2 occurred at 400℃. The change of crystal size with Ta was clearly visible from bright and dark field images.The clear high-resolution electron microscope (HREM) images of 110α, 111γ, 112α, and 200α,phases were observed. The interplanar distances from TEM (transmission electron microscope) and HREM match the calculated values very well. From the results of the vibrating sample magnetometer(VSM), the good magnetic properties of Fe-N films were obtained at 150℃ of Ts and 200℃ of Tα,respectively.

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EFFECTS OF TREATMENT TEMPERATURE ON THE MICROSTRUCTURE AND MAGNETIC PROPERTIES OF Fe-N THIN FILMS

参考文献