中国物理B ›› 2016, Vol. 25 ›› Issue (11): 117506-117506.doi: 10.1088/1674-1056/25/11/117506

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Effects of thickness and annealing condition on magnetic properties and thermal stabilities of Ta/Nd/NdFeB/Nd/Ta sandwiched films

Wen-Feng Liu(刘文峰), Min-Gang Zhang(张敏刚), Ke-Wei Zhang(张克维), Hai-Jie Zhang(张海杰), Xiao-Hong Xu(许小红), Yue-Sheng Chai(柴跃生)   

  1. 1 School of Materials Science and Engineering, Institute of Advanced Materials, Taiyuan University of Science and Technology, Taiyuan 030024, China;
    2 Institute of Materials Chemistry, Shanxi Normal University, Linfen 041000, China
  • 收稿日期:2016-05-31 修回日期:2016-08-19 出版日期:2016-11-05 发布日期:2016-11-05
  • 通讯作者: Min-Gang Zhang E-mail:mgzhang@163.com
  • 基金资助:
    Program supported by the National Natural Science Foundation of China (Grant No. 51305290), the Higher Education Technical Innovation Project of Shanxi Province, China (Grant No. 2013133), the Fund Program for the Scientific Activities of Selected Returned Overseas Professionals of Shanxi Province, China (Grant No. 2015003), and the Program for the Key Team of Scientific and Technological Innovation of Shanxi Province, China (Grant No. 2013131009).

Effects of thickness and annealing condition on magnetic properties and thermal stabilities of Ta/Nd/NdFeB/Nd/Ta sandwiched films

Wen-Feng Liu(刘文峰)1, Min-Gang Zhang(张敏刚)1, Ke-Wei Zhang(张克维)1, Hai-Jie Zhang(张海杰)1, Xiao-Hong Xu(许小红)2, Yue-Sheng Chai(柴跃生)1   

  1. 1 School of Materials Science and Engineering, Institute of Advanced Materials, Taiyuan University of Science and Technology, Taiyuan 030024, China;
    2 Institute of Materials Chemistry, Shanxi Normal University, Linfen 041000, China
  • Received:2016-05-31 Revised:2016-08-19 Online:2016-11-05 Published:2016-11-05
  • Contact: Min-Gang Zhang E-mail:mgzhang@163.com
  • Supported by:
    Program supported by the National Natural Science Foundation of China (Grant No. 51305290), the Higher Education Technical Innovation Project of Shanxi Province, China (Grant No. 2013133), the Fund Program for the Scientific Activities of Selected Returned Overseas Professionals of Shanxi Province, China (Grant No. 2015003), and the Program for the Key Team of Scientific and Technological Innovation of Shanxi Province, China (Grant No. 2013131009).

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摘要： Ta/Nd/NdFeB/Nd/Ta sandwiched films are deposited by magnetron sputtering on Si (100) substrates, and subsequently annealed in vacuum at different temperatures for different time. It is found that both the thickness of NdFeB and Nd layer and the annealing condition can affect the magnetic properties of Ta/Nd/NdFeB/Nd/Ta films. Interestingly, the thickness and annealing temperature show the relevant behaviors that can affect the magnetic properties of the film. The high coercivity of 24.1 kOe (1 Oe=79.5775 A/m) and remanence ratio (remanent magnetization/saturation magnetization) of 0.94 can be obtained in a Ta/Nd(250 nm)/NdFeB(600 nm)/Nd(250 nm)/Ta film annealed for 3 min at 1023 K. In addition, the thermal stability of the film is also linked to the thickness of NdFeB and Nd layer and the annealing temperature as well. The excellent thermal stability can be achieved in a Ta/Nd(250 nm)/NdFeB(600 nm)/Nd(250 nm)/Ta film annealed at 1023 K.

关键词: coercivity, thermal stability, thickness, annealing condition

Abstract: Ta/Nd/NdFeB/Nd/Ta sandwiched films are deposited by magnetron sputtering on Si (100) substrates, and subsequently annealed in vacuum at different temperatures for different time. It is found that both the thickness of NdFeB and Nd layer and the annealing condition can affect the magnetic properties of Ta/Nd/NdFeB/Nd/Ta films. Interestingly, the thickness and annealing temperature show the relevant behaviors that can affect the magnetic properties of the film. The high coercivity of 24.1 kOe (1 Oe=79.5775 A/m) and remanence ratio (remanent magnetization/saturation magnetization) of 0.94 can be obtained in a Ta/Nd(250 nm)/NdFeB(600 nm)/Nd(250 nm)/Ta film annealed for 3 min at 1023 K. In addition, the thermal stability of the film is also linked to the thickness of NdFeB and Nd layer and the annealing temperature as well. The excellent thermal stability can be achieved in a Ta/Nd(250 nm)/NdFeB(600 nm)/Nd(250 nm)/Ta film annealed at 1023 K.

Key words: coercivity, thermal stability, thickness, annealing condition

中图分类号:  (High coercivity materials)

  • 75.50.Vv
75.70.-i (Magnetic properties of thin films, surfaces, and interfaces)