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利用准一维排列控制单分子磁体的自旋动力学
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论文题目:Control of the Spin Dynamics of Single‐Molecule Magnets by using a Quasi One‐Dimensional Arrangement
论文作者:Keiichi Katoh*, Satoshi Yamashita, Nobuhiro Yasuda, Yasutaka Kitagawa, Brian K. Breedlove, Yasuhiro Nakazawa, Masahiro Yamashita*
发表期刊:Angew Chem Int Ed, 2018, In press   [ pdf ]

Magnetic dipole interactions are dominate in quasi one‐dimensional (1D) molecular magnetic materials, in which TbNcPc units (Tb3+=terbium(III) ion, Nc2−=naphthalocyaninato, Pc2−=phthalocyaninato) adopt a structure similar to TbPc2 single‐molecule magnets (SMMs). The magnetic properties of the [TbNcPc]0/+ (neutral 1 and cationic 2) with 1D structures are significantly different from those of a magnetically diluted sample (3). In particular, the magnetic relaxation time (τ) of 2 in the low‐temperature region is five orders of magnitude slower than that of 3. Furthermore, the coercivity (HC) of 2 remained up to about 20 K. The single‐ion anisotropy of Tb3+ ions in a 1D structure and the magnetic dipole interactions acting among molecules determines the direction of the magnetic properties. These results show that the spin dynamics can be improved by manipulating the arrangement of SMMs in the solid state.