4Herbst J F, Croat J J, Pinkerton F E, et al. Relationships between Crystal Structure and Magnetic Properties in Nd2 Fe14 B [ J]. Phys Rev B, 1984, 29(7), 4 176 -4 178.
5Li Wei, Li Anhua, Wang Huijie, et al. Study on Strengthening and Toughening of Sintered Rare-Earth Permanent Magnets [ J ]. Journal of Applied Physics, 2009, 105(7) : 07A703 -07A703 -3.
6Sagawa M, Fujimura S, Togawa N. New Material for Permanent Magnets on a Base of Nd and Fe[J]. J Appl Phys, 1984, 55 (6): 2083-2087.
7Guo Yongquan, Li Wei, Roy Sujoy, et al. Magnetic and Electronic Transport Properties of CaMn1 -x NbxO3 [ J ]. Chemistry of Materials, 2005, 17(10) : 2 735 -2 739.
8Guo Yongquan, Li Wei, Feng Weichun, et al. Structural Stability and Magnetic Properties of SmCo7-xGax [ J]. Applied Physics Letters, 2005, 86: 192513.
9Bennet L H, Watson R E. Symmetry and Supersymmetry in Crystals[J]. PhysRevB, 1987, 35(2): 845 -847.
10Ahmad Z, Haq A, Husain S, et al. Influence of Ti Content on Magnetic and Microstructural Properties of Fe-28Cr 15Co 3. 5Mo Permanent Magnets[J]. JMagnMagnMater, 2003, 257(2/3): 397-402.