1. M. Sagawa, S. Fujimura, N. Togawa, H. Yamamoto, Y. Matsuura, Journal of Applied Physics, 55 (1984) 2083-2087.
2. J. Li, C. Guo, T. Zhou, Z. Qi, X. Yu, B. Yang, M. Zhu, Journal of Magnetism and Magnetic Materials, 454 (2018) 215-220.
3. J.L. Xu, Q.F. Xiao, D.D. Mei, Y.X. Tong, Y.F. Zheng, L. Li, Z.C. Zhong, Surf Coat Tech, 309 (2017) 621-627.
4. P. Zhang, G. Xu, J. Liu, X. Yi, Y. Wu, J. Chen, Appl Surf Sci, 363 (2016) 499-506.
5. J. Di, S. Guo, L. Chen, P. Yi, G. Ding, K. Chen, M. Li, D. Lee, A. Yan, J Rare Earth, 36 (2018) 826-831.