1. Department of Advanced Functional Materials Research, Takasaki Institute for Advanced Quantum Science, National Institutes for Quantum Science and Technology (QST), Watanuki-machi 1233, Takasaki, Gunma 370-1292, Japan
2. Forschungszentrum Jülich GmbH, Jülich Centre for Neutron Science @ MLZ, Lichtenbergstraße 1, Garching D-85747, Germany
3. Department of Engineering, Ibaraki University, Hitachi 316-8511, Japan