Mitsuru AKAKI

Mitsuru AKAKI

Ph.D. in Science, Sophia University, 2011
Associate Professor

Research group: Condensed Matter Experiments
Phone: +81-78-803-5996
E-mail: m-akakicrystal.kobe-u.ac.jp
Personal HP: https://sites.google.com/view/mitsuru-akaki

研究内容

I study the properties of materials under extreme conditions such as high magnetic fields and ultralow temperatures. For example, I investigate the unique cross-correlation effects (magnetoelectric effects) in a class of materials known as multiferroics, in which magnetic and dielectric properties are strongly coupled, using various physical property measurements including specific heat, magnetization, and electric polarization. By pursuing research ranging from fundamental understanding of material properties to explorations aimed at future applications, and by developing experimental measurement systems, I aim to create new value in this research field.

Main Publications

• M. Akaki, M. Matsumoto, Y. Narumi, S. Okubo, H. Ohta, and M. Hagiwara, "Terahertz broadband one-way transparency with spontaneous magnon decay", Science Advances 11, eado6783 (2025).
• M. Akaki, K. Kimura, Y. Kato, Y. Sawada, Y. Narumi, H. Ohta, T. Kimura, Y. Motome, and M. Hagiwara, "Nonreciprocal linear dichroism observed in electron spin resonance spectra of the magnetoelectric multiferroic Pb(TiO)Cu₄(PO₄)₄", Physical Review Research 3, L042043 (2021).
• M. Akaki, D. Yoshizawa, A. Okutani, T. Kida, J. Romhányi, K. Penc, and M. Hagiwara, "Direct observation of spin-quadrupolar excitations in Sr₂CoGe₂O₇ by high-field electron spin resonance, Physical Review B 96, 214406 (2017).
• M. Akaki, H. Kuwahara, A. Matsuo, K. Kindo, and M. Tokunaga, "Successive Magnetic Transitions of Ca₂CoSi₂O₇ in High Magnetic Fields", Journal of the Physical Society of Japan 83, 093704 (2014).
• M. Akaki, H. Iwamoto, T. Kihara, M. Tokunaga, and H. Kuwahara, "Multiferroic properties of an åkermanite Sr₂CoSi₂O₇ single crystal in high magnetic fields", Physical Review B 86, 060413(R) (2012).
• M. Akaki, J. Tozawa, D. Akahoshi, and H. Kuwahara, "Gigantic magnetoelectric effect caused by magnetic-field-induced canted antiferromagnetic-paramagnetic transition in quasi-two-dimensional Ca₂CoSi₂O₇ crystal", Applied Physics Letters 94, 212904 (2009).