1. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
2. Elements Strategy Initiative Center for Magnetic Materials, National Institute for Materials Science, Tsukuba 305-0047, Japan
3. Daido Steel Co., Ltd., Nagoya 461-8581, Japan
4. Daido Electronical Co., Ltd., Nakatsugawa 509-9132, Japan