Acta Phys. -Chim. Sin. ›› 2016, Vol. 32 ›› Issue (7): 1829-1838.doi: 10.3866/PKU.WHXB201605191

• ARTICLE • Previous Articles     Next Articles

Effects of B-and In-Doping on Microstructures, Magnetostriction and Magnetic Properties of Melt-Spun Fe81Ga19 Ribbons

Meng-Xiong CAO1,Hao LIU1,Hai-Ou WANG1,2,Yun ZHANG1,Wei-Shi TAN1,*(),Yang-Guang SHI3   

  1. 1 Department of Applied Physics, School of Science, Nanjing University of Science and Technology, Key Laboratory of Soft Chemistry and Functional Materials of Ministry of Education, Nanjing 210094, P. R. China
    2 Institute of Materials Physics, Hangzhou Dianzi University, Hangzhou 310018, P. R. China
    3 Department of Applied Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 210093, P. R. China
  • Received:2016-04-12 Published:2016-07-08
  • Contact: Wei-Shi TAN E-mail:tanweishi@njust.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(11079022);National Natural Science Foundation of China(U1332106);Scientific Research Innovation Projects of Jiangsu Province for University Graduate Students, China(CXLX13_179)

Abstract:

Two series of (Fe0.81Ga0.19)100-xBx (Fe-Ga-B) and (Fe0.81Ga0.19)100-xInx (Fe-Ga-In) ribbons were successfully prepared with melt spinning method. Thermal treatments were afterwards conducted out on these Fe-Ga-B ribbons. The sample microstructures of the alloys were examined by high resolution X-ray diffraction (HRXRD) and extended X-ray absorption fine structure (EXAFS). The magnetic properties were measured by a vibrating sample magnetometer (VSM) at room temperature. The magnetostriction constant, measured by resistance strain gauge method, of the melt-spun (Fe0.81Ga0.19)98B2 ribbon decreased sharply due to the L12 phase. Both the Fe2B and modified-DO3 phases played a positive role in increasing the magnetostriction constant of the Fe-Ga alloys. The Fe2B phase presented a lower saturation magnetization and a larger saturation field. As the B composition increased, the saturation magnetization of the ribbons decreased and the coercivity intensified. For the Fe-Ga-In ribbons, the non-magnetic In-rich phase was formed, leading to their lattices distortion and, hence, the magnetoelastic effect was weakened. The non-magnetic In-rich phase could suppress the movements of the magnetic domain and domain wall. Therefore, In-doping decreased the saturation magnetostriction and saturation magnetization of the Fe-Ga alloy. In-doping could also increase the coercivity of the Fe-Ga alloy. The addition of B and In changed the microstructures of the Fe-Ga alloys and accordingly their magnetic properties and magnetostriction.

Key words: Fe-Ga alloy, Magnetostriction, Fe2B phase, In-rich phase, EXAFS

MSC2000: 

  • O646