# Event Details

- **Event Name**:  Seminar by Professor Shinji MIWA (The University of Tokyo)
- **Event Start and End Date**: Thu, 26 Jun, 2025 at 10:30 am – Thu, 26 Jun, 2025 at 11:30 am
- **Event Description**: This talk reviews recent studies on spintronic devices based on chiral systems. The first half focuses on the chiral antiferromagnet Mn3Sn. In this material, a specific noncollinear magnetic structure, known as negative spin chirality, gives rise to a ferroic magnetic ordering of cluster octupole polarization. This polarization generates a substantial Berry curvature due to magnetic Weyl points in momentum space. We have successfully grown epitaxial thin films of Mn₃Sn using molecular beam epitaxy and achieved current-induced full switching of the octupole polarization. Moreover, we have observed a tunnel magnetoresistance effect in an all-antiferromagnetic tunnel junction composed of Mn3Sn/MgO/Mn3Sn. These unique properties of octupole polarization suggest promising avenues for future spintronic devices.

The second half of the talk concerns organic chiral molecules. In recent years, an increasing number of studies have reported a wide range of CISS-related phenomena. Despite significant experimental evidence, a comprehensive theoretical understanding of CISS remains lacking, posing a major challenge to both practical applications and further scientific progress. In our work, we employed a chiral electrolyte, either (1S)-(+)- or (1R)-(−)-camphor-10-sulfonic acid, to carry out time-resolved magnetoresistance measurements. Our results suggest that the key mechanism behind CISS is a magnetic interaction between the chiral molecules and the ferromagnetic electrode, similar to interlayer exchange coupling. We found that the electric current does not directly induce spin polarization; rather, it acts as a probe of the system. Instead, spin polarization appears to be driven by the molecular vibrations of the chiral molecules, which is a concept consistent with thermally driven spin polarization observed even in the absence of an applied bias current.
- **Event URL**: https://allevents.in/hong-kong/seminar-by-professor-shinji-miwa-the-university-of-tokyo/200028360935345
- **Event Categories**: workshops, entertainment
- **Interested Audience**: 
  - total_interested_count: 1

## Ticket Details


## Event venue details

- **city**: Hong Kong
- **state**: HK
- **country**: Hong Kong
- **location**: Rm G25, Science Centre North Block, The Chinese University of Hong Kong
- **lat**: 22.29912
- **long**: 114.17223
- **full address**: Rm G25, Science Centre North Block, The Chinese University of Hong Kong, 90 Nathan Rd, Tsim Sha Tsui, Kowloon, Hong Kong SAR,Hong Kong

## Event gallery

- **Alt text**: Seminar by Professor Shinji MIWA (The University of Tokyo)
  - **Image URL**: https://cdn-az.allevents.in/events10/banners/eb7b87ecdea5a01ea3fc7062e50ee030e02775abd1026f707af3d7b5dc4fe7c8-rimg-w1200-h1708-dcffffff-gmir?v=1750334024

## FAQs

- **Q**: When and where is  Seminar by Professor Shinji MIWA (The University of Tokyo) being held?
  - **A:** Seminar by Professor Shinji MIWA (The University of Tokyo) takes place on Thu, 26 Jun, 2025 at 10:30 am to Thu, 26 Jun, 2025 at 11:30 am at Rm G25, Science Centre North Block, The Chinese University of Hong Kong, 90 Nathan Rd, Tsim Sha Tsui, Kowloon, Hong Kong SAR,Hong Kong.
- **Q**: Who is organizing  Seminar by Professor Shinji MIWA (The University of Tokyo)?
  - **A:** Seminar by Professor Shinji MIWA (The University of Tokyo) is organized by Department of Physics, CUHK 香港中文大學物理系.
- **Q**: Who is this event for? Is it right for me?
  - **A:** Seminar by Professor Shinji MIWA (The University of Tokyo) is ideal for curious learners, students, and skill-builders looking to gain hands-on knowledge and practical expertise in a focused, interactive setting. Whether you're a first-time attendee or a longtime enthusiast in Hong Kong, this event is thoughtfully curated to deliver a standout experience worth every moment. If  Seminar by Professor Shinji MIWA (The University of Tokyo) sounds like your kind of event, don't wait - spots fill up fast.

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