Welcome to KNUT Magnetic Material Lab.
Welcome to KNUT Magnetic Material Lab.
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Welcome to Hee-Sung Han's Homepage. We perform research on non-volatile materials including magnetic and ferroelectric materials, and explore their applications in next-generation semiconductor devices such as neuromorphic devices, quantum computing elements, and probabilistic computing architectures.
Our lab performs experiments using a wide range of fabrication tools, including a UHV sputtering chamber and maskless lithography system, as well as various advanced measurement instruments. We actively collaborate with domestic and international universities, research institutes, and synchrotron facilities to pursue cutting-edge research.
본 연구실은 자성체 및 강유전체 등 비휘발성 재료(non-volatile materials)를 연구하며, 이를 기반으로 한 차세대 반도체 소자(예: 뉴로모픽 소자, 양자컴퓨팅 소자, 확률컴퓨팅 소자 등)관련 연구를 진행하고 있습니다. UHV 스퍼터링 챔버(UHV sputtering chamber), 마스크리스 리소그래피(maskless lithography) 등 다양한 소자 제작 장비와 정밀 계측 장비를 바탕으로 실험을 수행하고 있으며, 국내외 대학, 연구소, 방사광가속기 등과의 활발한 협력을 통해 연구를 진행하고 있습니다.
We are seeking highly motivated postdoctoral researchers and graduate students.
If you're interested, please feel free to contact us at hs.han@ut.ac.kr.
자성소재 및 차세대 반도체 소자 연구에 열정을 가진 박사후연구원, 대학원생, 학부 연구생을 찾고 있습니다. 관심 있으신 분은 hs.han@ut.ac.kr로 편하게 연락주시기 바랍니다.
News
July 2025
2025.06.25 – 2025.07.02. Jinwon and Jieun visited LBNL for beamtime experiments at the Advanced Light Source (ALS), and also toured research laboratories at Stanford University and UC Berkeley. We would like to thank Dr. Myunghwan Kang for guiding us at ALS, Dr. Jieun Lee for the lab tour at UC Berkeley, and Dr. Hwancheol Jeong for hosting the tour at Stanford and giving an insightful introduction to quantum technologies.
진원이와 지은이가 LBNL의 ALS(Advanced Light Source)에서 빔타임 실험을 수행하고, Stanford University 및 UC Berkeley의 연구실을 투어하였습니다. ALS 안내를 도와주신 강명환 박사님, UC 버클리 연구실 투어를 해주신 이지은 박사님, Stanford University 캠퍼스 투어와 양자기술에 대한 설명을 해주신 정환철 박사님께 감사드립니다.
2025.07.07. Our patent "Memory Device" has been applied in Korean Intellectual Property Office. Great work, Jiho, Jinwon, and Woojin!
2025.07.28. Our paper "Sensitive dependence on initial conditions in a formation of magnetic vortices" has been published in Applied Physics Letters in collaboration with LBNL and UNIST. Thanks for the wonderful collaboration!
April 2025
2025.04.21. Our paper "Direct measurement of reduced exchange stiffness and its impact on magnetic vortex behavior in PyGd alloys" has been published in Applied Physics Letters in collaboration with LBNL and University of Memphis. Thanks for the wonderful collaboration!
February 2025
2025.02.14. Prof. Hee-Sung Han was invited to be a speaker at Chungbuk Cheongju Synchrotron Radiation Glocal Symposium (제1회 충북청주 방사광가속기 글로컬 심포지움) @ Cheongju
2025.02.03. Our patent "Metal structure and metal structure forming device" has been registered in Korean Intellectual Property Office in collaboration with UNIST. Thanks for the wonderful collaboration!
December 2024
2024.12.04. Our paper "Enhancement of magnetic domain wall velocity via resonant dissipation of standing wave modes of domain wall structure with perpendicular magnetic anisotropy" has been published in Physical Review B in collaboration with UNIST, LBNL. Thanks for the wonderful collaboration!
November 2025
2024.11.28. Prof. Hee-Sung Han was invited to be a speaker at the 2024 Symposium on Utilizing the Chungbuk Multi-Purpose Synchrotron for Advanced Materials Industry Development (2024년 첨단 신소재 산업 활성화를 위한 충북 다목적방사광가속기 활용 심포지엄) @ Cheongju
2024.11.21. Prof. Hee-Sung Han was invited to be a speaker at the 36th Synchrotron Radiation Users' Workshop (제36차 방사광이용자 연구발표회)
Here is a talk about our work at the 35th Synchrotron Radiation Users' Workshop (@Pohang):
OQ-03 Three-dimensional spin textures revealed by magnetic transmission X-ray microscopy (Invited Speaker: Hee-Sung Han)
August 2024
2024.08.01. Our patent "Apparatus and method for separating skirmion bags" has been registered in Korean Intellectual Property Office in collaboration with UNIST. Thanks for the wonderful collaboration!
July 2024
2024.07.31. Our project was selected as Basic Research Project (Global Basic Research Laboratory (G-BRL; 글로벌-기초연구실)), supported by National Research Foundation of Korea (NRF Korea)!
2024.07.16. Prof. Hee-Sung Han was invited to be a speaker at ISE 2024 Summer Conference
Here is a talk about our work at ISE 2023 (@Busan):
[Rising Star Researcher Session 3] Studying magnetic texture for advanced spin-based electronics (Invited Speaker: Hee-Sung Han)
2024.07.03. Our paper "Skyrmion-Based Ternary CPU Design" has been published in IEEE Computer Society Annual Symposium on VLSI in collaboration with LBNL. Thanks for the wonderful collaboration!
2024.07.01. Seongsu and Jiho joined our group! Welcome!
June 2024
2024.06.01. Jinwon and Woojin joined our group! Welcome!
May 2024
2024.05.29. Our patent "metal structure with a magnetic domain wall and a method for generating Skyrmion" has been registered in Korean Intellectual Property Office in collaboration with UNIST (Prof. Ki-Suk Lee). Thanks for the wonderful collaboration!
2024.05.23. Our paper "Direct Observation of Room-Temperature Magnetic Skyrmion Motion Driven by Ultra-Low Current Density in Van Der Waals Ferromagnets" has been published in Advanced Materials in collaboration with KRISS, SKKU, KAIST, LBNL. Thanks for the wonderful collaboration!
April 2024
2024.04.25. Our project was selected as Basic Research Project (Infrastructure Supporting Grants for Young Scientist (신진연구자인프라 지원)), supported by National Research Foundation of Korea (NRF Korea)!
2024.04.24. Our project was selected as Basic Research Project (Outstanding Young Scientist Grants (우수신진연구)), supported by National Research Foundation of Korea (NRF Korea)!
2024.04.04. Our patent "Method and apparatus for forming a skyrmion bag using electric current" has been registered in Korean Intellectual Property Office in collaboration with UNIST (Prof. Ki-Suk Lee). Thanks for the wonderful collaboration!
March 2024
2024.03.01. Jieun Lee joined our group! Welcome!
2024.03.11. Our paper "Control of a Twisted Domain Wall Motion Supported by Topology" has been published in Journal of Applied Physics in collaboration with Chonnam National University (Prof. Soong-Geun Je) and LBNL (Dr. Mi-Young Im). Thanks for the wonderful collaboration!
February 2024
2024.02.16. Our paper "Manipulation of the magnetic monopole injection for topological transition" has been published in NPG Asia Materials in collaboration with LBNL, UC San Diego, and UNIST. Thanks for the excellent collaboration!
November 2023
2023.11.22. Prof. Hee-Sung Han was invited to be a speaker at KMS 2023 Winter Conference
Here is a talk about our work at KMS 2023 Winter Conference (@Busan):
초S-2-3 Generation of topological spin textures by manipulating monopole injection in Fe/Gd multilayers (Invited Speaker: Hee-Sung Han)
October 2023
2023.10.31. Our paper "Three-Dimensional Character of Spin Structures in Nanomagnetic Materials" has been published in Journal of the Korean Magnetics Society. It is selected as the cover (Editor's Choice) of the 31 October 2023 issue of Journal of the Korean Magnetics Society.
2023.10.31. Prof. Hee-Sung Han was invited to be a speaker at MMM 2023
Here is a talk about our work at MMM 2023 (@Dallas):
BD-01 Non-trivial Charge-dependent Spin Phenomena in Topological Spin Textures (Invited Speaker: Hee-Sung Han)
September 2023
2023.09.01. Prof. Hee-Sung Han joined in the Department of Materials Science and Engineering at the Korea National University of Transportation (KNUT)
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