• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Doping-free ferromagnetic semiconductor based on 2D layered materials

Research Project

Project/Area Number 18K13785
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 21050:Electric and electronic materials-related
Research InstitutionTokyo Institute of Technology

Principal Investigator

Muneta Iriya  東京工業大学, 工学院, 助教 (90750018)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywordsスピントロニクス / 遷移金属カルコゲナイド / 半導体 / 強磁性半導体 / バレートロニクス
Outline of Final Research Achievements

Ferromagnetic semiconductors are made by doping magnetic impurities in semiconductors. To get high Curie temperature materials, high density of magnetic impurities is necessary. However, this loses electron mobility. Transition-metal chalcogenide MoS2 is expected to be a next generation semiconductor beyond silicon, and it is known that poly-crystalline grain boundary and defects in lattice structures result in the showing of ferromagnetism. Thus, poly-crystalline MoS2 is anticipated to be a doping-free ferromagnetic semiconductor. In this study, I successfully formed poly-crystalline MoS2 thin layer by sputtering, and conformed the formation of the atomic-scale layered structure in MoS2. Moreover, magnetization measurement was performed and large saturation magnetization was successfully observed in the poly-crystalline MoS2 thin layer.

Academic Significance and Societal Importance of the Research Achievements

遷移金属カルコゲナイド層状物質MoS2は、典型的な磁性不純物を含まず、通常の単結晶では
非磁性(反磁性)である。多結晶や格子欠陥など、構造を変化させるだけで強磁性を示すようになるなど、物質の知られざる性質をつまびらかにすることが出来た。遷移金属カルコゲナイド層状物質群は、ツイスト2層構造や1次元ヘテロ構造、ファンデアワールスレゴブロックなど、同一の物質であっても構造やナノスケールの形状パターンの組み合わせにより、その性質が大きく変化する例がいくつも挙げられている。本研究が新たな材料物質の設計トレンドの形成に一役担うだけの意義のあるものであると考える。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (5 results)

All 2019 2018

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (4 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results)

  • [Journal Article] Strong edge-induced ferromagnetism in sputtered MoS2 film treated by post-annealing2019

    • Author(s)
      Shirokura Takanori、Muneta Iriya、Kakushima Kuniyuki、Tsutsui Kazuo、Wakabayashi Hitoshi
    • Journal Title

      Applied Physics Letters

      Volume: 115 Issue: 19 Pages: 192404-192404

    • DOI

      10.1063/1.5118913

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] Ferromagnetic tunnel devices with two-dimensional layered material MoS22019

    • Author(s)
      Iriya Muneta, Naoki Hayakawa, Takanori Shirokura, Kuniyuki Kakushima, Kazuo Tsutsui, Hitoshi Wakabayashi
    • Organizer
      Collaborative Conference on Materials Research (CCMR) 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Edge induced ferromagnetism in sputtered MoS2 film controlled by annealing2019

    • Author(s)
      Takanori Shirokura, Iriya Muneta, Kuniyuki Kakushima, Kazuo Tsutsui, Hitoshi Wakabayashi
    • Organizer
      The 80th JSAP Autumn meeting
    • Related Report
      2019 Research-status Report
  • [Presentation] Magnetic Force Microscopy Image Measured on MoS2 Thin Film Sputtered on CaF2 (111) Substrate2018

    • Author(s)
      I. Muneta, Danial B. Z., N. Hayakawa, K. Kakushima, K. Tsutsui and H. Wakabayashi
    • Organizer
      10th International School and Conference on Physics and Applications of Spin Phenomena in Solids
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] スパッタMoS2薄膜における磁気特性の成膜温度依存性2018

    • Author(s)
      白倉 孝典,宗田 伊理也,角嶋 邦之,筒井 一生,若林 整
    • Organizer
      応用物理学会
    • Related Report
      2018 Research-status Report

URL: 

Published: 2018-04-23   Modified: 2022-01-27  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi