PORTFOLIO
Follow your intuition
Recent activities
2025.3.26
A new journal paper was published online entitled, "Y. Shima and T. Yamazaki et al, Iron Loss analysis in Soft Magnetic Materials via Maxwell equations-coupled Multiscale Micromagnetic Simulations, Journal of Applied Physics, 137 (12), 123906 (2025)".
2025.3.24
A new journal paper was accepted, "K. Nakamura and T. Yamazaki et al, Efficient Discovery of Large Magnetic Anisotropy with Thermodynamically Stable Materials via Multi-Objective Bayesian Optimization, Science and Technology of Advanced Materials: Methods (STAM-M), accepted (2025)".
2025.3.14-17
第72回応用物理学会春季学術講演会@東京理科大学野田キャンパスに参加し、1件の研究発表を実施しました。発表題目はこちらをご覧ください。
2025.3.13
A new journal paper was published online entitled, "T. Yamazaki et al, Uncovering the origin of magnetic moment enhancement in Fe-Co-Ir alloys via high-throughput XMCD, Physical Review Materials, 9, 034408 (2025)".
2025.3.8-10
第175回日本金属学会春期講演大会@東京都立大学に参加し、2件の研究発表を実施しました。発表題目はこちらをご覧ください。
2025.3.7
磁気記録・情報ストレージ研究会@名古屋大学で招待講演を実施しました。題目は、「ハーフメタルホイスラー合金のXMCD測定と機械学習を活用したスペクトル解析」です。
2025.2.3
A new journal paper was published online entitled, "K. Sano and T. Yamazaki et al, Tuning magnetic properties by microstructure control of nanocrystalline thin films for compact vibration energy harvesters, IEICE Electronics Express 21, 1 (2025) pp.1-6"
2025.1.30-1/3
大型放射光施設SPring-8 (Japan) にて、放射光実験を実施しました。本実験では、「ナノ結晶アモルファス合金のコンビ組成傾斜膜を利用した軟磁性起源の解明」（Proposal No. 2024B1320）を題目とし、ビームラインBL25SUの電磁石XMCD装置を用いた磁気円二色性（XMCD）測定を行いました。
2025.1.1
Happy new year 2025! Follow your intuition.
2024.12.20
Invited talk at NSF Global Center Meeting (NSF, University of Maryland, and Tokyo University of Science) and presented my study, "Machine Learning Assisted XMCD Spectra Analysis in High Spin-Polarized Co2MnGaxGe1-x Heusler Alloys".
2024.12.6-11
Visited the University of Maryland, College Park to have a seminar and discuss recent activities.
2024.12.1-6
Joined and had 2 presentations at the 2024 MRS Fall Meeting, Boston. The titles are "Unveiling High Spin Polarization in Mn-Rich Co-Mn-Ge Heusler Alloys via High-Throughput XMCD Analysis" and "Tuning Ferrimagnetic Response in Compositionally Spread Gd-Fe-B Amorphous Thin Films". The detail of presentations is HERE
2024.11.11-14
大型放射光施設SPring-8 (Japan) での放射光計測実験に参加しました。本実験では、「機械学習による大規模MCDスペクトルの自動解析と埋もれた情報の抽出」（Proposal No. 2024B1266）を題目とし、放射光X線磁気円二色性計測とデータサイエンス⼿法を組み合わせることで、ホイスラー合⾦における機能発現メカニズムを明らかにすることを目指した。
2024.11.04-09
大型放射光施設SPring-8 (Japan) での放射光計測実験に参加しました。本実験では、「Multi-modal Analysis for Investigating Structural and Electronic Properties of Heusler Alloys」（Proposal No. 2024B1402）を題目とし、ホイスラー合金の構造と電子物性を材料インフォマティクス技術と光電子ホログラフィー回折を用いて解析し、スピントロニクスデバイスへの応用可能性を検討した。
2024.9.24-27
第48回日本磁気学会学術講演会@秋田大学に参加し、6件の研究発表を実施いたしました。発表題目はこちらをご覧ください。
2024.9.18-20
第175回日本金属学会秋期講演大会@大阪大学に参加し、1件の研究発表を実施いたしました。発表題目はこちらをご覧ください。
2024.9.8-11
2024年度日本機械学会年次大会@愛媛大学に参加し、1件の研究発表を実施いたしました。発表題目はこちらをご覧ください。
2024.9.2
A new journal paper was published, "Y. Iwasaki, R. Toyama, T. Yamazaki, Y. Igarash, M Kotsugi, Y. Sakuraba, Autonomous search for half-metallic materials with B2 structure, Sci. Technol. Adv. Mater. Methods (STAM:M) 4, 1 (2024) 2403966"
2024.7.5
A new journal paper was published, "K. Omae, T. Yamazaki, K. Sano, C. Oka, J. Sakurai, S. Hata, Effect of Noise on Accuracy of Grain Size Evaluation by Magnetic Barkhausen Noise Analysis, International Journal of Automation Technology, 18, 4 (2024) pp. 528-536"
2024.06.08-10
大型放射光施設SPring-8 (Japan) にて、放射光実験を実施しました。本実験では、「アモルファス軟磁性合金におけるナノ結晶化機構の微視的解明」（Proposal No. 2024A1739）を題目とし、ナノ結晶化機構の解明を目指したIn-situ XRDおよびXAFS計測を実施し、原子スケールでの磁気特性発現の解明を目指した。
2024.5.30
A new journal paper was published, "T. Kato, R. Morisaki, T. Yamazaki, C. Oka, J. Sakurai, S. Hata, Prototype of parallel plate type fast atom beam source and its improvement of irradiation characteristics, International Journal of Automation Technology 18, 4 (2024) pp. 513-520"
2024.5.30
A new journal paper was published, "Ryunosuke Nagaoka, Ken Masuzawa, Alexandre Lira Foggiatto, Takahiro Yamazaki, Ippei Obayashi, Yasuaki Hiraoka, Chiharu Mitsumata, Masato Kotsugi, Quantification of the coercivity factor in soft magnetic materials at different frequencies using topological data analysis, IEEE Transactions on Magnetics, 30 May (2024)"
2024.5.28
A new journal paper was published, "Alexandre Lira Foggiatto, Ryunosuke Nagaoka, Michiki Taniwaki, Takahiro Yamazaki, Takeshi Ogasawara, Ippei Obayashi, Yasuaki Hiraoka, Chiharu Mitsumata, Masato Kotsugi, Analysis of the excess loss in high-frequency magnetization process through machine learning and topological data analysis, IEEE Transactions on Magnetics, 28 May (2024)"
2024.3.22-25
第71回応用物理学会春季学術講演会@東京都市大学に参加し、4件の研究発表を実施いたしました。発表題目はこちらをご覧ください。
2024.3.12-15
第174回日本金属学会春期講演大会@東京理科大学に参加し、3件の研究発表を実施いたしました。発表題目はこちらをご覧ください。
2024.1.9-10
Joined a two-days CREST/Presto camp for "Exploring Innovative Materials in Unknown Search Space" at Shonan village center
2024.1.1
Happy new year. Follow your intuition. (Ben L. Feringa, University of Groningen)
2023.12.23
A new paper entitled "Soft Magnetostrictive Materials: Enhanced Magnetostriction of Fe‐Based Nanocrystalline Alloys via Ga Doping" as a co-auther in
Scripta Materialia 242 (2024), 115956 is available online.
2023.10.26
Published a new paper entitled "Visualization of the Magnetostriction Mechanism in Fe-Ga Alloy Single Crystal Using Dimensionality Reduction Techniques" as a co-auther in
IEEE Transactions on Magnetics, (2023), 59, 11.
2023.9.27-29
Oral presentation entitled "Towards Sustainable Cooling: Elastocaloric Effects and Phase Transition Characteristics of Superelastic Ni-Ti Alloys" at the session of Development of Mechanics of Functional Materials and Structures toward Sustainable Society at M&M2023 conference at Tsukuba University.
2023.9.1
Published a new paper as "Research in the U.S. during the COVID-19 Pandemic" in the Ceramics 'Crossroad', by the Japanese Society of Ceramics, Volume 58, Issue 9, 2023 (September 1, 2023).
2023.9.1
Published a review new paper as "Combinatorial Synthesis of Highly Corrosion-Resistant Nanocrystalline Alloys," in the "Materia" by The Japan Institute of Metals and Materials, Volume 62, Issue 9, 2023, pp. 600-605.
2023.8.7
Published a new paper as a co-auther entitled "Origin of negative anisotropic magnetoresistance effect in Fe0.75Co0.25 single-crystal thin films upon Ir addition" in
Physical Review Materials, 7 (2023) 084401.
2023.7.17-20
Attended JAFOE (Japan Association of the Foundations of Engineering) 2023 as a general participant and presented our research entitled "Sustainable energy harvesting using functional magnetic materials"
2023.7.15
Published a new paper as a co-auther entitled "Strain measurement based on Magnetic Barkhausen noise for thin films" in Microelectronic Engineering, 279 (2023) 112057.
2023.4.28
Published a new paper as the first auther entitled "Tuning the Temperature Range of Superelastic Ni-Ti Alloys for Elastocaloric Cooling via Thermal Processing" in Journal of Physics: Energ, 5 (2023) 024020.
2023.2.28
Awarded a JSPS Grant-in-Aid for Early-Career Scientists (2nd) with a title of Designing magnetic heterostructures with tunable magnetoelastic coupling (No. 23K13636).
2022.11.22
Keynote speech, "Design of large and sensitive magnetostrictive composites for vibration energy harvesters" at international symposium,
"Integrated Nanocomposites for Thermal and Kinetic Energy Harvesting (INTAKE) Seminar 2022".
2022.10.01
Started JST ACT-X project,
"Iron-loss analysis of nanocrystalline magnetostrictive composite using magnetic Barkhausen noise" for 2.5 yrs.
2022.8.10
Newly opened my new website. Still some pages are under construction.
2022.4.1
Started new position, project assisitant professor at Tokyo University of Science
Assigned to JST CREST project (Head: Dr. Iwasaki), "Exploring Innovative Materials in Unknown Search Space"
Assigned to MEXT power electric project (Head: Prof. Okamoto), "Creation of ultra-low-loss magnetic materials"
2022.3.7
Returned to Japan from College Park, US.
2021.4.6
Started visiting researcher at University of Maryland, College Park, US
2020.4.1
Awarded a JSPS Grant-in-Aid for Early-Career Scientists
2019.4.1
Started as a JSPS postdoctoral fellow at Nagoya University
2019.3.26
Recieved Ph.D. degree in Materials Science and Engineering from Yokohama National University
2016.7.1
Awarded a Toden memorial fellowship
2016.3.31
Finished Master's program at Yokohama National University
2014.3.31
Finished Bachelor's program at Yokohama National University
2009.3.31
Graduated from Chigusa high school, Aichi
Introduction
Brief biography
TYamazaki, Ph.D. is an adjunct assistant professor at Tokyo University of Science with an academic mission of multi-scale design for high-performance magnetic materials. He specializes in magnetic analysis using machine learning and synchrotron radiation. In 2019, He received his Ph.D. in Materials Science and Engineering from Yokohama National University, where his research focused on magnetostrictive materials with a new metallographic analysis using magnetic Barkhausen noise. As a JSPS Postdoctoral researcher for three years at Nagoya University, Japan, and the University of Maryland, US, he developed a measurement method combining his magnetic analysis technique, combinatorial thin-film synthesis, and machine learning algorithm. He currently leads his research of magnetic Barkhausen noise analysis and new nanocrystalline magnetic materials supported by the JSPS KAKENHI for Young Scientists since April 2020 and the JST ACT-X since October 2022.
Research area / keywords
My research mission is to design, model, develop the high-performance magnetic functional materials such as soft/ hard magnets, multi-ferroic materials, magnetoelastic materials and ferromagnetic shape memory alloys.
- Solid-state physics
- Magnetism
- Materials science and engineering
- Nanotechnology
- Magnetic domain/ microstructure
- Sintered alloys/ Thin films/ nanoparticles
- soft/hard magnets
- Synchrotron X-ray analysis
- Micromagnetic simulation
- Interpretable & unsupervised Machine learning
- Persistent homology
E-mail to me
takahiro.yamazaki (at) rs.tus.ac.jp | rd070672 (at) gmail.com
Skills
Hard skills
- Magnetron sputtering
- Wet mixing method
- Photolithography
- Wafer process
- SEM
- EBSD
- TEM
- FIB
- SQUID
- VSM
- XRD
- AFM
- 3D printer
- SPring-8/KEK
- XANES/EXAFS
- XAS/XMCD
- PEEM/PED
Soft skills
- VAPS
- Wien2k
- Quantum espresso
- AkaiKKR/SPR-KKR
- LAMMPS
- Mumax3
- OOMMF
- Ubermag
- COMSOL
- Solidworks
- Linux/Ubuntu
- Python
- C++
- HTML/PHP
- CSS
- Markdown
- Git
- VSCode
- OriginPro
- ImageJ
- Notion
- Illustrator
Work experiences
-
Oct. 2022 - Mar. 2025:
Project researcher (JST CREST/INNOPEL)
Department of Materials Science and Technology, Tokyo University of Science, Japan (Prof. Kotsugi)
- Theme: Machine learning-based analysis for low-loss soft magnets -
Jul. 2021 - Present:
Visiting Researcher
Research Center for Magnetic and Spintronic Materials, National Institute for Materials Science (NIMS) (Group leader: Dr. T. Ohkubo) -
Apr. 2022 - Mar. 2027:
Project assistant professor
Department of Materials Science and Technology, Tokyo University of Science, Japan (Prof. Kotsugi)
- Theme (my own): Design of multifunctional nanocrystalline composites
- Theme (JST CREST): Exploring Innovative Materials in Unknown Search Space
- Theme (MEXT Power.elect.): Creation of ultra-low-loss magnetic materials -
Apr. 2021 - present:
Postdoctoral/visiting Researcher
Department of Materials Science and Engineering, the University of Maryland, College Park, US (Prof. Takeuchi)
- Theme: Microstructural improvement for NiTi elastocaloric alloys -
Apr. 2019 - Mar. 2022:
JSPS research fellowship (PD)
Department of Micro-Nano Mechanical Science and Engineering, Nagoya University, Japan (Prof. Hata)
- Theme: Conbinatorial synthesis of magnetic thin films
Education
-
Apr. 2016 - Mar. 2019:
Ph.D. in Materials Science
- Department of Materials Science and Engineering, Yokohama National University, Japan
- Supervised by Prof. Wataru Nakao
- Thesis: Magnetic Barkhausen noise in FeCo magnetostrictive alloys -
Apr. 2014 - Mar. 2016:
MA in Physics
- Department of Physics, Electrical and Computer Engineering, Yokohama National University, Japan
- Supervised by Prof. Yuko Ichiyanagi
- Thesis: Magnetic hyperthermia using magnetic nanoparticles -
Apr. 2010 - Mar. 2014:
BA in Physics
- Department of Physics, College of Engineering, Yokohama National University, Japan
- Supervised by Prof. Masatomo Uehara
- Thesis: Doping effect on the new delafossite-type superconductors
Professional Memberships
Current Membership
- The Magnetics Society of Japan (MSJ)
- The Japan Society of Mechanical Engineers (JSME)
- The Iron and Steel Institute of Japan (ISIJ)
Past Membership
- The Physical Society of Japan (JPS)
- Japan Society of Applied Physics (JSAP)
- The Society of Nano Science and Technology