Study on pressure induced phase transitions in NaCl type Mott semiconductors FeMnS and CrMnS

2008 Fiscal Year Final Research Report

• Project/Area Number: 18540317
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Condensed matter physics I
• Research Institution: Osaka University
• Principal Investigator: MITA Yoshimi Osaka University, 大学院・基礎工学研究科, 助教 (40231617)
• Project Period (FY): 2006 – 2008
• Keywords: Mott絶縁体 / 高圧力 / 相転移

Research Abstract

Fe_xMn_<1-x>Sについては鉄18%の、Cr_xMn_<1-x>Sについてはクロム18%の試料について高圧力下で赤外反射測定とX線回折実験をおこなった。いずれも圧力誘起の金属転移が観測されその転移圧力を求めることができた。この結果をX線回折のそれとあわせることによりイオン間距離と金属転移の関係を定量的に明らかにすることができた。このことよりこの系統の物質の金属転移や超巨大磁気抵抗効果のメカニズム解明のための重要なデータを提供できた。

Research Products

• [Journal Article] Metal-dielectric transitions in Fe_xMn_<1-x>S single-crystals (2007)
  • Author(s): G.Abramova, N.Volkov, G.Petrakovskiy, Y.Mita, O.Bajukov, D.Velikanov, A.Vorotynov, V.Sokolov, A.Bovina
  • Journal Title: JETP Lett 86, No.6 Pages: 371-374
  • Peer Reviewed
• [Presentation] Mott半導体(Fe, Mn)Sの圧力誘起相転移 (2008)
  • Author(s): 加賀山朋子、美田佳三、G.Abramova, V.Sokolov, G.Petrakovsky
  • Organizer: 第49回高圧討論会
  • Place of Presentation: 姫路商工会議所
  • Year and Date: 2008-11-14
• [Presentation] 3d-solid solution sulfides-new materials for electronics (2008)
  • Author(s): G. Abramova, G. Petrakovskiy, N. Volkov, M.Boehm, Y.Mita, A.Vorotynov, R.Szymczak, R.Zuberek, D.Velikanov, V.Sokolov, N.Kiselev
  • Organizer: 3rd International Conference on Physics of electronic materials
  • Place of Presentation: Kaluga, Russia
  • Year and Date: 2008-10-02
• [Presentation] Mott半導体Fe_<0.18>Mn_<0.82>Sの圧力誘起相転移 (2008)
  • Author(s): 美田佳三、加賀山朋子、G.Abramova, V.Sokolov, G.Petrakovsky
  • Organizer: 日本物理学会2008年秋季大会
  • Place of Presentation: 岩手大
  • Year and Date: 2008-09-20
• [Presentation] Synthesis and metal-dielectric transitions in 3d-sulfides solid solutions (2007)
  • Author(s): G.Abramova, V.Sokolov, G.Petrakovskiy, N.Volkov, M.Boehm, Y.Mita, N.Kiselev, I.Filatova, A.Pichugin
  • Organizer: Russia-Japan Seminar on Advanced Materials and Processing
  • Place of Presentation: Novosibirsk、Russia
  • Year and Date: 2007-09-15
• [Presentation] Magnetic transition in Fe_<0.27>Mn_<0.73>S single-crystal (2007)
  • Author(s): G.Abramova, G.Petrakovskiy, M.Boehm, B.Ouladdiaf, A.Vorotynov, A.Karatashev, D.Velikanov, V.Sokolov, Y.Mita , A.Bovina
  • Organizer: Int. Interdiscip. Meeting on Structure & Magnetic Ordering in Solids(Multiferroics-2007)
  • Place of Presentation: Rostov-on-Loo, Russia
  • Year and Date: 2007-09-05