FUNCTIONAL MATERIALS SCIENCE
TSUYOSHI KIMURA LAB.
INTRODUCTION OF LABORATORY
Multiferroics, a class of functional materials, are defined as materials in which multiple order parameters such as ferromagnetic, ferroelectric, and ferroelasitic orders coexist and couple each other. We aim to explore new types of mutiferroic couplings and orders such as magnetic toroidal, magnetic quadrupole, and chiral orders, which lead to unconventional control of electronic properties in materials, and hopefully which will be used for future electronic devices. To achieve these purposes, we proceed with domestic and intimate collaborations with scientists having various experimental and theoretical techniques, and expand our targets into various materials which no one focused on in terms of multiferroic research.
育成した希土類金属化合物の単結晶試料
開発した高圧下強誘電特性測定用セル。セル中の試料の配置図とその写真。
特殊なX線を使って明らかになったらせん状に配列した電気四極子を起源とする鏡像構造
MESSAGE
SEE THINGS FROM A DIFFERENT ASPECT. DON’T BE AFRAID OF MAKING A MISTAKE. AFTER MUCH TRIAL AND ERROR, YOU WILL REACH UNEXPECTED NEW FINDINGS.
One of our main research topics is the study on “multiferroics”: a class of functional materials showing unusual couplings between magnetism and electricity. In the 20th century, such materials were quite rare. When I participated in the American Physical Society meeting in 2001, I firstly heard the term “multiferroics”. There, several theorists explained why there are so few multiferroics in nature. Since I am an experimentalist, I decided to experimentally demolish the theoretical negative suggestion, and jumped in the research field. To develop new functional materials, sometimes go against common sense and don’t be afraid of making a mistake. After much trial and error, you will reach unexpected new findings.
keyword
Multiferroics / electromagnetic effect / ferroic domain / ferroaxial order / electromagneto-optical effect / domain / TbMnO_3 / hexagonal ferrite / domain structure / electric field-induced exchange bias effect / conical helical magnetism / helical magnetic material / exchange bias / conical Helical magnetic materials / Multiferroics / Electrorotation effect / Electromagnetic (optical) effect / Database screening / Non-reciprocal optical response / Electromagnetic (optical) effect / Ferroic ordered physical properties / Complex domain control / Multiferroic materials / Ferrochiral order / magnetic quadrupolar order / liquid crystal / resonance incommensurate transition / commensurate / orbital ordering /Ferromagnetism / Strongly correlated electron systems / BiMnO_3 / Magnetic field-induced permittivity change / Magnetic field-induced ferroelectric polarization flop / Orthorhombic distortion / Spin-orbit-lattice interaction / Ferroelectricity / Manganese oxide / Incoherent transition / Matching / Orbital order / spin glass / electrical timing effect / condensed matter experiments / chirality / electric quadrupole / toroidal moment / oxide transistor / triangular lattice antiferromagnetic material / magnetic frustration / quadrupole order / magneto-dielectric effect / rare earth metal Mn oxidation Materials / Transition metal oxides / Magnetism / Dielectrics / Strongly correlated systems
PROFILE : Professor Tsuyoshi Kimura
1991 B.Eng., in Synthetic Chemistry, University of Tokyo
1996 Ph.D(Eng.), in Superconductivity, University of Tokyo
1996-2000 Postdoctoral fellow, Joint Research Center for Atom Technology
2000-2003 Lecturer, Dept. of Applied Physics, University of Tokyo
2003-2005 Limited term staff member, Los Alamos National Laboratory
2005-2007 Member of technical staff, Bell Laboratories, Lucent Technologies
2007 Professor, Division of Materials Physics, Osaka University
2017 Professor, Dept. of Advanced Materials Science, University of Tokyo
STUDENT VOICE : RYUSUKE MISAWA
Prof. Tsuyoshi Kimura is not only a world leading scientist with brilliant achievements but also a supervisor who cares about each of his students and guide their research to a proper direction. He is also a mentor who gives the first priority to students’ development, respects our opinions about research themes, and admits our trials. Thus, he provides us the circumstance that we freely proceed with our own research, and give us advice which advances our research in terms of his wide experiences and deep knowledge. Our research aims innovative breakthroughs in condensed matter physics and materials science, which are potentials for future electronic devices. I feel greatly attracted to my circumstance that I can engage in such a research.
APPLIED PHYSICS
Research on the intertwined phenomena of electricity and magnetism
Tsuyoshi Kimura Lab.,
Department of Applied Physics,
Graduate School of Engineering,
The University of Tokyo
Building No. 6, Faculty of Engineerng, 7-3-1 Hongo,
Bunkyo-ku, Tokyo 113-8656, Japan
+81-4-7136-3752
tkimura@edu.k.u-tokyo.ac.jp
The Goal of Applied Physics
The goal of Applied Physics is to develop a stage = “new material” that can manipulate undeveloped degrees of freedom, to explore unknown phenomena created from that stage and to bring out excellent functions, and to bring out its excellent functions. The purpose is to contribute to the development of human society by elucidating the mechanisms and developing application fields for these phenomena and functions.
AMS (Advanced Materials Science)
Department Office
AMS (Advanced Materials Science),
Graduate School of Frontier Sciences,
The University of Tokyo
Kashiwanoha 5-1-5, Kashiwa, Chiba 277-8561, Japan
Email : ams-office(at)ams.k.u-tokyo.ac.jp
Please change (at) to @.