Study on magnetoresistance in spin filter tunnel junctions with an antiferromagnetic layer

• Project/Area Number: 23760295
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Electronic materials/Electric materials
• Research Institution: Ube National College of Technology (2011, 2013-2014); Kitakyushu National College of Technology (2012)
• Principal Investigator: SENBA Shinya 宇部工業高等専門学校, 電気工学科, 准教授 (40342555)
• Project Period (FY): 2011-04-28 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000); Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2011: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: 電気・電子材料 / 分子線エピタキシー / スピントロニクス / 電子・電気材料 / MBE

Outline of Final Research Achievements

A magnetic tunnel junction with ferromagnetic (FM) insulator EuS is expected to show a tunneling magnetoresistance induced by a spin-filtering effect. Growth conditions for fabricating a junction structure composed of EuS, FM semiconductor Ge1-xMnxTe and antiferromagnetic (AF) semiconductor MnTe by molecular beam epitaxy method were investigated. We also successfully manipulated a magnetic property of EuS by substituting Te for S. Results of magnetization measurements indicated that no exchange bias occurred on an interface between FM and AF layers in the proposed junction.

Research Products

• [Presentation] MBE法によるBaF2基板上への閃亜鉛鉱型MnTeの成長 (2014)
  • Author(s): 前川亮介, 冨田知大, 仙波伸也, 西村謙佑、浅田裕法，岸本堅剛，小柳剛
  • Organizer: 2014応用物理・物理系学会中国四国支部合同学術講演会
  • Place of Presentation: 島根大学
  • Year and Date: 2014-07-26
• [Presentation] MBE法によるInP基板上への強磁性半導体Ge1-xMnx Te薄膜の成長 (2012)
  • Author(s): 谷村英昭
  • Organizer: 第１４回化学工学会学生会宇部大会
  • Place of Presentation: 宇部工業高等専門学校
• [Presentation] Characterization of Epitaxial EuS(111) Thin Films on BaF2(111) and SrF2(111)
  • Author(s): S. Senba, N. Matsumoto, M. Jomura, H. Asada, T. Koyanagi, K. Kishimoto, Y. Fukuma
  • Organizer: The 19th International conference on magnetism
  • Place of Presentation: Busan(Korea)
• [Presentation] InP基板上へのEuS薄膜の成長と結晶性評価
  • Author(s): 今泉悠佑, 植田義幸, 松本直樹, 仙波伸也, 浅田裕法, 岸本堅剛, 小柳剛
  • Organizer: 応用物理学会・日本物理学会 中国四国支部学術講演会
  • Place of Presentation: 山口大学