Material science on post-perovskite phases

2016 Fiscal Year Final Research Report

• Project/Area Number: 26287073
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: Tohoku University
• Principal Investigator: Ohgushi Kenya 東北大学, 理学(系)研究科(研究院), 教授 (30455331)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: ポストペロブスカイト / 磁性 / 量子コンパス型相互作用

Outline of Final Research Achievements

We have performed exploratory synthesis and characterization of materials with the post-perovskite structure. We carried out resonant x-ray scattering experiments for CaIrO3, and clarified a dispersion relationship of spin wave and orbital excitation. We also developed a new solid solution, which exhibits the post-perovskite transition as a function of chemical composition. Our detailed analysis of structural data indicates that the post-perovskite transition is triggered by the ionic radius mismatch and that there is a novel noncentrosymmetric metallic phase with the tetragonal perovskite structure near the post-perovskite transition.

Free Research Field

物性物理