中国物理B ›› 2013, Vol. 22 ›› Issue (8): 83303-083303.doi: 10.1088/1674-1056/22/8/083303

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

Mössbauer studies on the shape effect of Fe84.94Si9.68Al5.38 particles on their microwave permeability

韩满贵, 邓龙江   

  1. State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
  • 收稿日期:2012-10-17 修回日期:2013-01-04 出版日期:2013-06-27 发布日期:2013-06-27
  • 基金资助:
    Project supported by the National Key Basic Research Program of China (Grant No. 2010CB334702), the China National Funds for Distinguished Young Scientists (Grant No. 51025208), the International Collaboration Project of Sichuan Province, China (Grant Nos. 2011HH0001 and 2012JQ0053), and the Program for New Century Excellent Talents in Universities, China (Grant No. NCET-11-0060).

Mössbauer studies on the shape effect of Fe84.94Si9.68Al5.38 particles on their microwave permeability

Han Man-Gui (韩满贵), Deng Long-Jiang (邓龙江)   

  1. State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
  • Received:2012-10-17 Revised:2013-01-04 Online:2013-06-27 Published:2013-06-27
  • Contact: Han Man-Gui E-mail:mangui@gmail.com
  • Supported by:
    Project supported by the National Key Basic Research Program of China (Grant No. 2010CB334702), the China National Funds for Distinguished Young Scientists (Grant No. 51025208), the International Collaboration Project of Sichuan Province, China (Grant Nos. 2011HH0001 and 2012JQ0053), and the Program for New Century Excellent Talents in Universities, China (Grant No. NCET-11-0060).

PDF (PC)

429

赞

摘要： Ball milling for long time (such as 10, 20, and 30 h) can transform Fe84.94Si9.68Al5.38 alloy powders with irregular shapes into flakes. X-ray diffraction (XRD) and Mössbauer measurements have proven that the unmilled particles and the flakes obtained by milling for 10 h have the same D03-type superlattice structure. The flakes obtained by milling for 20 h and 30 h have the same disorder α-Fe(Si, Al) structure. There are more than 6 absorption peaks in the transmission Mössbauer spectra (TMSs) for the particles with D03-type superlattice structure, which can be fitted with 5 sextets representing 5 different Fe-site environments. However, only 6 TMS absorption peaks have been found for particles with a disorder α-Fe(Si, Al) structure, which can be fitted with the distributions of Mössbauer parameters (Bhf, isomer shift). The TMS results show that the flaky particles have a stronger tendency to possess the planar magnetic anisotropy. As the result, the flakes have larger microwave permeability values than particles with irregular shapes. The conversion electron Mössbauer spectra (CEMSs) also show the significantly different Fe-sites environments between the alloy surface and the inside.

关键词: Mö, ssbauer spectroscopy, magnetic permeability, superlattice

Abstract: Ball milling for long time (such as 10, 20, and 30 h) can transform Fe84.94Si9.68Al5.38 alloy powders with irregular shapes into flakes. X-ray diffraction (XRD) and Mössbauer measurements have proven that the unmilled particles and the flakes obtained by milling for 10 h have the same D03-type superlattice structure. The flakes obtained by milling for 20 h and 30 h have the same disorder α-Fe(Si, Al) structure. There are more than 6 absorption peaks in the transmission Mössbauer spectra (TMSs) for the particles with D03-type superlattice structure, which can be fitted with 5 sextets representing 5 different Fe-site environments. However, only 6 TMS absorption peaks have been found for particles with a disorder α-Fe(Si, Al) structure, which can be fitted with the distributions of Mössbauer parameters (Bhf, isomer shift). The TMS results show that the flaky particles have a stronger tendency to possess the planar magnetic anisotropy. As the result, the flakes have larger microwave permeability values than particles with irregular shapes. The conversion electron Mössbauer spectra (CEMSs) also show the significantly different Fe-sites environments between the alloy surface and the inside.

Key words: Mössbauer spectroscopy, magnetic permeability, superlattice

中图分类号:  (M?ssbauer spectra)

  • 33.45.+x
07.55.-w (Magnetic instruments and components) 68.65.Cd (Superlattices)