Seminar Announcement: Prof. Young Keun Kim on 3D Chiral Spintronics

SPINTEC will host a seminar on Thursday, May 7th, featuring Professor Young Keun Kim from the Department of Materials Science and Engineering at Korea University. The talk, titled "3D Chiral Spintronics: Spin-Selective Transport through Chiral Magnetic Nanohelices," will begin at 10:30.

Location & Access:

* The in-person event will be held in the IRIG/SPINTEC auditorium 445, CEA Building 10.05 in Grenoble.

* Important: Physical access to the CEA site requires prior authorization. Requests must be submitted to admin.spintec@cea.fr before April 29th.

* A video conference option is available via Zoom:

* Link: [https://univ-grenoble-alpes-fr.zoom.us/j/98769867024?pwd=dXNnT3RMeThjYStybGVQSUN0TVdJdz09](https://univ-grenoble-alpes-fr.zoom.us/j/98769867024?pwd=dXNnT3RMeThjYStybGVQSUN0TVdJdz09)

* Meeting ID: 987 6986 7024

* Passcode: 025918

Seminar Abstract:

Professor Kim will discuss recent advances in synthesizing and characterizing 3D chiral magnetic nanostructures. Chiral crystals, with their inherent handedness in atomic arrangement, exhibit unique properties like spin selectivity and asymmetric magnetoresistance. While similar effects are known in chiral organic molecules, creating uniform inorganic nanostructures with controlled chirality at scale has been a significant challenge.

Kim's team has addressed this by electrochemically synthesizing 3D chiral ferromagnetic cobalt-iron nanohelices within anodized aluminum oxide templates. They achieved precise control over the spiral direction and number of strands by incorporating chiral molecules and tuning the applied potential. The research demonstrates nanoscale observation of Faraday's law of induction and shows how these chiral nanohelices can regulate electron flow direction. These findings have promising implications for developing novel spin-tunable devices based on chirality and ferromagnetism.

The work is published in *Science*: Y. S. Jeon et al., Science 389, 1031-1036 (2025). DOI: [https://doi.org/10.1126/science.adx5963](https://doi.org/10.1126/science.adx5963)

Speaker Biography:

Professor Young Keun Kim has been a faculty member at Korea University since 2000, following industry roles at Samsung Electro-Mechanics and Quantum Corporation. He is a highly decorated researcher, having received the Korean Government's National Order of Service Merit-Green Stripes (2017) and all three major awards from Korea University (Research Awards in 2021/2022, Technology Award in 2016, Teaching Award in 2005). His recent honors include the Kang Il-Koo∙Hyundai BNG Steel Award (2025) and the Amo Award (2019) from the Korean Magnetics Society, and the Iljin Academic Achievement Award (2015) from the Korean Institute of Metals and Materials.

With over 330 peer-reviewed publications, 150 registered patents, and 150 invited talks, Professor Kim's research focuses on novel magnetic thin films and nanostructured materials for applications in spintronic memory, semiconductor metallization, sustainability, and biomedicine.

On Thursday May 07th, we have the pleasure to welcome in SPINTEC Prof. Young Keun KIM from Department of Materials Science and Engineering, Korea University. He will give us a seminar at 10:30 entitled : 3D Chiral Spintronics: Spin-Selective Transport through Chiral Magnetic Nanohelices

Place : IRIG/SPINTEC, auditorium 445 CEA Building 10.05 (presential access to the conference room at CEA in Grenoble requires an entry authorization. Request it before April 29th at admin.spintec@cea.fr)

video conference : https://univ-grenoble-alpes-fr.zoom.us/j/98769867024?pwd=dXNnT3RMeThjYStybGVQSUN0TVdJdz09

Meeting ID: 987 6986 7024

Passcode: 025918

Abstract : Chiral crystals with well-defined handedness in atomic arrangements exhibit intriguing properties such as spin selectivity, asymmetric magnetoresistance, and skyrmions. Although similar geometry-induced phenomena have been observed in chiral organic-molecule-based systems, synthesizing uniform inorganic nanostructures with desired chirality using a scalable method remains challenging. We electrochemically synthesized 3D chiral ferromagnetic cobalt-iron nanohelices from nanoparticles in anodized aluminum oxide templates. The spiral directions and the number of strands were regulated by incorporating chiral molecules and applying an appropriate potential. We demonstrate the observation of Faraday’s law of induction at the nanoscale and how chiral nanohelices regulate the direction of electron flow. The implications of our findings extend to the technological realm, particularly in the context of charity and ferromagnetism-based spin-tunable devices.

Reference:

Y. S. Jeon et al., Science 389. 1031-1036 (2025).

https://doi.org/10.1126/science.adx5963

Biography : Professor Kim has worked in the Department of Materials Science and Engineering at Korea University, Seoul, Korea, since 2000. Before joining Korea University, he worked for Samsung Electro-Mechanics in Korea and Quantum Corporation in the USA. Prof. Kim received the Korean Government’s National Order of Service Merit-Green Stripes in June 2017. He is the recipient of all three major awards at Korea University: The Research Awards in 2022 and 2021, the Technology Award in 2016, and the Teaching Award in 2005. Prof. Kim received the Kang II-Koo∙Hyundai BNG Steel Award in 2025 and the Amo Award in 2019 from the Korean Magnetics Society (KMS). He received the Iljin Academic Achievement Award from the Korean Institute of Metals and Materials (KIM) in 2015. He has published over 330 peer-reviewed journal papers, holds over 150 registered patents, and has delivered over 150 invited talks. Prof. Kim’s research interests include the development of novel magnetic thin films and nanostructured materials for spintronic memory devices, semiconductor metallization, and sustainability and biomedical applications.

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