| Affiliation: | a Cross-correlated Materials Research Group (CMRG), RIKEN Advanced Science Institute, Wako 351-0198, Japan;b Institut für Materialwissenschaft, Technische Universität Darmstadt, Petersenstraße 23, 64287 Darmstadt, Germany;c Correlated Electron Research Group (CERG), RIKEN Advanced Science Institute, Wako 351-0198, Japan;d WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan;e Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan;f Department of Applied Physics, University of Tokyo, Tokyo 113-8656, Japan;g Multiferroics Project, ERATO, Japan Science and Technology Agency (JST), Tokyo 113-8656, Japan |
