Hideo Kimura is Leader of the Magnetoelectric Crystal Group, National Institute for Materials Science, Tsukuba, Japan. His research focuses on antiferromagnetic oxide single crystals for magnetic refrigeration, nonlinear optical single crystals, microgravity science, piezoelectric and ferroelectric crystals, and multiferroic thin films. In the past five years he has co-authored 29 papers and four books. Zhenxiang Cheng is Associate Professor at the Institute for Superconducting and Electronic Materials, University of Wollongong, NSW, Australia, and a Future Fellow of the Australian Research Council. His research interests include dielectric, ferroelectric and multiferroic, materials and physics, magnetism and spintronics. Tingting Jia is a postdoctoral researcher in the Multifunctional Materials Group, Optical and Electronic Materials Unit, National Institute for Materials Science, Tsukuba, Japan. Her research focuses on multiferroic thin films, high-k gate dielectrics, and nonpolar wide gap semiconductor fil