Development of Oxygen Spin Observation Method by combined Quantum Beam Analysis for Complex Anion Sequence Determination

2022 Fiscal Year Final Research Report

• Project/Area Number: 19K20595
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 80040:Quantum beam science-related
• Research Institution: Muroran Institute of Technology
• Principal Investigator: Miyazaki Masanori 室蘭工業大学, 大学院工学研究科, 助教 (30634357)
• Project Period (FY): 2019-04-01 – 2023-03-31
• Keywords: 量子ビーム / μSR / 準位交差共鳴 / 酸素磁性 / 複合アニオン

Outline of Final Research Achievements

The μSR and muon level crossing resonance methods were studied as new experimental techniques to enable the determination of complex anion sequences using quantum beams.
In La2CuO4, we could not confirm the resonance with the nuclear quadrupole moment of Cu, but in the compound ATaO2N (A=Sr,Ba),we observed the resonance signals with the nuclear quadrupole moment of 14N that seems to be from muon sites stopped near O and N ions. We have also systematically measured the electrical resistivity and magnetic susceptibility of K2NiF4-type Ti oxides in the dilute electron-doped region and found the possibility of spin singlet in the highly doped region.

Free Research Field

物性物理学

Academic Significance and Societal Importance of the Research Achievements

複合アニオン化合物は、cis/transという新たな自由度を結晶格子上に与え、強誘電性をはじめとした種々の機能性を持った新規の機能性材料を生み出す可能性を秘めている。本研究では、複合アニオン化合物の典型物質の１つを用いて、ミュオンサイトを決定するためにミュオン準位交差共鳴実験を行い、Oイオン及びNイオン付近に止まったミュオンサイトからと思われる共鳴信号を観測することができた。このことは、従来法では難しかったアニオン配列を決める新たな実験手法の開発に繋がり、複合アニオン化合物の構造評価の利用への可能性を示すものである。