Research of the magnetic-field-induced phase transformation of the manganese alloy and its application to the giant magnetostrictive materi

• Project/Area Number: 19760495
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Structural/Functional materials
• Research Institution: Tohoku Gakuin University
• Principal Investigator: NASHIMA Osamu Tohoku Gakuin University, 工学部, 准教授 (00265183)
• Project Period (FY): 2007 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥3,670,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥270,000); Fiscal Year 2008: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2007: ¥2,500,000 (Direct Cost: ¥2,500,000)
• Keywords: 磁性 / 磁歪 / 相変態 / 磁気相図 / 超磁歪 / 強磁性

Research Abstract

三元合金MnCoGeの格子体積が600Kで生じる相変態により著しく変化することに注目し、これを利用した全く新しいタイプの超磁歪材料の可能性を探索した.本研究により我々は、MnCoGeの化学量論的組成からわずかにCoを減じることにより相変態を生じる温度が急激に減少し、その一方でキュリー温度は殆ど変化しないことを明らかにした.特にCoを8%程度減じた試料では、マルテンサイト変態温度がキュリー温度を下回っており、相変態を磁場により誘起するための条件を満たしている.すなわち、MnCoGeは磁場誘起結晶構造相転移を利用した、新しいタイプの超磁歪材料として極めて有望であることが明らかにされた.

Research Products

• [Journal Article] Chemical potential shift of Fe3-xVxSi studied by hard x-ray photoemission (2008)
  • Author(s): Y. T. Cui, A. Kimura, K. Miyamoto, M. Taniguchi, T. Xie S. Qiao, K. Shimada, H. Namatame, E. Ikenaga, K. Kobayashi, Hsin Lin, S. Kaprzyk, A. Bansil, O. Nashima, T. Kanomata
  • Journal Title: Physical Review B vol. 78
  • Peer Reviewed
• [Journal Article] Magnetic properties of Ni-Mn-Fe-Ga ferromagnetic shape memory alloys (2008)
  • Author(s): T. Kanomata, S. Murakami, D. Kikuchi, O.Nashima, H. Nishida
  • Journal Title: International Journal of Applied Electromagnetics and Mechanics vol. 27 Pages: 215-224
  • Peer Reviewed
• [Journal Article] Magnetic properties of Ni-Mn-Fe-Ga ferromagnetic shape memory alloys (2008)
  • Author(s): T. Kanomata, S. Murakami, D. Kikuchi, O. Nashima, H. Nishida
  • Journal Title: International Journal of Applied Electromagnetics and Mechanics 27 Pages: 215-224
  • Peer Reviewed
• [Journal Article] Chemical potential shift of Fe3_<-x> V_x-Si studied by hard x-ray photoemission (2008)
  • Author(s): Y. T. Cui, A. Kimura, K. Miyamoto, M. Taniguchi, T. Xie S. Qiao, K. Shimada, H. Namatame, E. Ikenaga, K. Kobayashi, Hsin Lin, S. Kaprzyk, A. Bansil, O. Nashima, T. Kanomata
  • Journal Title: Physical Review B 78
  • Peer Reviewed
• [Journal Article] Magnetic properties of Ni-Mn-Fe-Ga ferromagnetic shape memory alloys (2008)
  • Author(s): T. Kanomata, et. al.
  • Journal Title: International Journal of Applied Electromagnetics and Mechanics 27 Pages: 215-224
  • Peer Reviewed