Researcher Information

KITAZAWA Takafumi

Assistant Professor

Opening New Frontiers in Magnetism through Crystal Growth, Physical Property Measurements, and Detailed Analysis

Department of Physics, Electronic Condensed Matter Physics

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Theme

Advancing quantum phenomena in bulk magnetic materials
Examples: the Kondo effect, cross-correlated responses, and hyperfine coupling

FieldCondensed matter physics, Strongly correlated electron systems, Magnetism
KeywordMetallic magnetism, Low-temperature physics, Kondo effect, Cross-correlated responses, Hyperfine coupling, Single crystal growth, High-resolution transport measurements, Thermodynamic measurements

Introduction of Research

I conduct comprehensive research on bulk single crystals containing magnetic elements, from crystal growth and sample characterization to physical property measurements, with the aim of elucidating various physical phenomena. My main research focus is localized magnetism, and I am particularly interested in cross-correlated responses, in which different kinds of physical quantities are coupled to one another, and the Kondo effect, in which a nonmagnetic state emerges at low temperatures in metals containing magnetic elements.

My experimental expertise lies in measuring fundamental physical properties of bulk magnetic materials, including specific heat, magnetization, and electrical resistivity. I also place strong emphasis on careful data analysis and quantitative comparisons with numerical calculations in order to extract as much of the underlying physics as possible from the experimental data.

Representative Achievements

Paramagnetic electron-nuclear spin entanglement in HoCo2Zn20, Takafumi Kitazawa, Yasuyuki Shimura, Takahiro Onimaru, Shun Tsuchida, Katsunori Kubo, Yoshinori Haga, Hironori Sakai, Yoshifumi Tokiwa, Shinsaku Kambe, Yo Tokunaga, Phys. Rev. Research 8, 023009 (2026).
Observation of field-induced single-ion magnetic anisotropy in a multiorbital Kondo alloy (Lu,Yb)Rh2Zn20, T. Kitazawa, Y. Ikeda, T. Sakakibara, A. Matsuo, Y. Shimizu, Y. Tokunaga, Y. Haga, K. Kindo, Y. Nambu, K. Ikeuchi, K. Kamazawa, M. Ohkawara, and M. Fujita, Phys. Rev. B 108, 085105 (2023).
Academic degreePh.D.
Self Introduction

Fortunately, ever since I joined a research laboratory as a fourth-year undergraduate student, I have had many opportunities to conduct experiments at various external institutions. Through these experiences, I learned a variety of crystal growth methods and physical property measurement techniques. Around the time I obtained my Ph.D., I became genuinely interested in coffee, and now enjoying coffee at cafés is one of my favorite ways to spend my days off.

Academic background2019 B. S., Department of Physical Science, Faculty of Science, Hiroshima University
2021 M. S., Department of Physics, Graduate School of Science, Tohoku University
2024 Ph.D., Department of Physics, Graduate School of Science, Tohoku University
2024- Postdoctoral researcher, Advanced Science Research Center, Japan Atomic Energy Agency
2026- Assistant Professor, Department of Physics, Faculty of Science, Hokkaido University
Affiliated academic societyThe Physical Society of Japan, American Physical Society, The Japanese Society for Neutron Science
Room addressScience Building 2 2-104