Fabrication of magnetic clusters on molecules and evaluation of their magnetic state

2016 Fiscal Year Final Research Report

• Project/Area Number: 15H06092
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Nanostructural physics
• Research Institution: The University of Tokyo
• Principal Investigator: Hiraoka Naoka (太田奈緒香) 東京大学, 大学院理学系研究科(理学部), 助教 (40758827)
• Research Collaborator: YAMADA TOYOKAZU 千葉大学, 大学院融合科学研究科, 准教授 (10383548) ; NEGISHI MASAMICHI 東京大学, 大学院理学系研究科
• Project Period (FY): 2015-08-28 – 2017-03-31
• Keywords: 強相関電子系 / 半金属-絶縁体転移 / 磁性薄膜

Outline of Final Research Achievements

We purposed to create self-decoupled nanostructures consist of magnetic atoms with well-defined configuration, and elucidate their magnetic state. Scanning tunneling microscopy or pulsed laser deposition method was used to create well defined structures. Using the latter method, we obtained epitaxial thin films of perovskite type AIr1-xSnxO3, the electronic structure of which is expected to be characterized by the symmetry of the crystal. We revealed that the thin films show phase transition from paramagnetic semimetal to weak ferromagnetic insulator as a function of the substitution ratio and temperature. We also found anisotropic response of the systems to external magnetic field, e.g. in magnetization and magnetoresistance. The direction of the crystal growth and the anisotropy was correlated, which indicates controllability of the electromagnetic response of the film by tuning the structure.

Free Research Field

物性化学