1. Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
2. Sophia University, Tokyo, Japan
3. Kobe Steel Ltd., Kobe, Japan
4. Furukawa Electric Company, Ltd., Tochigi, Japan
5. High Field Laboratory for Superconducting Materials, Institute for Material Research, Tohoku University, Sendai, Japan
6. National Institutes for Quantum Science and Technology, Rokkasho Fusion Institute, Rokkasho, Aomori, Japan