1. State Key Lab of Metal Matrix Composite, School of Materials Science and Engineering, Shanghai Jiao Tong University; 800 Dong Chuan Road Shanghai 200240 P.R. China
2. Department of Materials Science and Engineering, Graduate School of Engineering, Osaka University; 2-1, Yamada-oka, Suita Osaka 565-0871 Japan
3. Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences; Ningbo 315201 P.R. China