最終更新日：2025年5月11日
Last updated: 11/05/2025
助教Assistant Professor
居室:Office: M110
先端スピントロニクス研究開発センターCenter for Science and Innovation in Spintronics
東北大学Tohoku University
〒980−8577 仙台市青葉区Katahira 2-1-1
片平2−1−1Sendai 980-8577
Japan
電話:Phone: +81 (0)22-
ファックス:Fax: +81 (0)22 217 5426
E-mail: lee.ayoung.c6 @ tohoku.ac.jp
李 阿英Dr A Young Lee
研究内容Research Interests
李 阿英は、2024年12月に廣畑研究室に加わりました.彼女は磁気熱量効果の研究を行っており、特にMnFe及び希土類系材料の構造転移とエントロピー変化の関連性を精査し磁気冷凍の効率向上を目指しています.このため精密な結晶構造解析・熱応答・磁気相転移と微細構造を通じて、室温での磁気熱量効果への影響を調べています.さらに構造・熱・磁性を考慮することで、合金組成と相転移・磁性の相関を研究し、磁気冷凍材料の開発を進めてきました.
こうした研究を発展させて、現在ホイスラー合金薄膜・強磁性絶縁体を用いたスピン流生成効率の向上に向けて、スピンカロリトロニクスの研究を遂行しています.具体的には表面プラズモンポラリトン励起を援用して、局在化したスピン信号の検出を行っています.ここで熱励起スピン流の生成効率の鍵は、磁性体の構造変化と磁気異方性が握っています.磁性材料開発と素子構造設計を通じて、安定な磁化・省エネルギー素子の開発に向けた最適化を行っています.
A Young Lee joined the Spintronics and Quantum Nanoelectronics Group in December 2024.
A Young Lee focused on the study of magnetocaloric materials, particularly aiming to enhance their cooling efficiency by investigating the relationship between structural transitions and entropy change in MnFe-based and rare-earth compounds. This research involved precise analysis of crystal structures, thermal response, magnetic phase behavior, and microstructure features to understand how these factors collectively influence the magnetocaloric effect near room temperature. By integrating structural, thermal, magnetic, and crystallographic characterizations, she contributed to demonstrating the relationships between material composition, phase transformations, and magnetocaloric performance, advancing the development of efficient solid-state cooling materials.
With this background, she is currently conducting research in spin-caloritronics, aiming to improve spin current generation on utilizing Heusler alloys and ferromagnetic insulators. By leveraging surface plasmon polariton excitation, the research focuses on inducing and evaluating localized spin signals. The research involves detailed analysis of structural change and magnetic anisotropy to identify key factors that influence the efficiency of thermally driven spin conversion. Through material design and structure fabrication, the research seeks to optimize conditions for stable magnetization and low switching current, contributing to the advancement of energy-efficient spintronic devices.