Magnetoresistance effect of conducting single-molecule magnet

2014 Fiscal Year Final Research Report

• Project/Area Number: 24750119
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Functional materials chemistry
• Research Institution: Tohoku University
• Principal Investigator: KATOH Keiichi 東北大学, 理学(系)研究科(研究院), 助教 (80374742)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 単分子磁石 / 磁気抵抗効果 / 分子磁性体 / 分子性導体 / 希土類 / フタロシアニン

Outline of Final Research Achievements

To elucidate the details of the magnetoresistance effects of conducting single-molecule magnets (SMM), [TbPc2]Ix (Terbium = Tb, Phthalocyanine = Pc, Iodine = I), which is robust to various physical property measurements, was studied. We produced a crystal of TbPc2, which has stable redox properties, by using an electrolytic oxidation crystallization method in the presence of iodine.
[TbPc2]Ix has uniaxial magnetic anisotropy along the c-axis in the crystal structure, and magnetic hysteresis was observed at 18 K. The semiconductor behavior reflects the observed electronic structure. In addition, it behaves as an SMM, which undergo slow relaxation of the magnetization. Spin-dependent conductivity correlated to the temperature dependence of the magnetic hysteresis. In other words, using [TbPc2]Ix, the magnetoresistance effect of conducting SMMs was observed for the first time.

Free Research Field

分子磁性