2023 Fiscal Year Final Research Report
Synthesis and detailed analysis of magnetic anisotropy of lanthanide single-molecule magnets using ligands with cationic moieties
| Project/Area Number |
20K05540
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Review Section |
Basic Section 34010:Inorganic/coordination chemistry-related
|
|---|
| Research Institution | Nara Women's University |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2020-04-01 – 2024-03-31
|
| Keywords | ランタノイド錯体 / 磁気特性 / 遅い磁化緩和 |
|---|
| Outline of Final Research Achievements |
We have synthesized lanthanide complexes with three-fold symmetry using ligands that contain coordination sites to cations such as alkali metal ions, and investigated the mechanism of the slow relaxation both from experimental and theoretical aspects. Gd(III) complexes exhibit slow magnetic relaxation up to 40 K even though they are isotropic lanthanide complexes, and we found the importance of the Raman process as a relaxation pathway. The importance of low-energy vibrations in crystals in the slow relaxation was revealed, and it was also found that the relaxation rate of magnetization varies greatly depending on the difference in the 2-D or 3-D network structure formed by the replacement of alkali metal ions, or on the hardness of the crystal.
|
| Free Research Field |
錯体化学
|
| Academic Significance and Societal Importance of the Research Achievements |
分子レベルで遅い磁化緩和を示すランタノイド錯体は単分子磁石という名称で知られており、その磁気特性の向上は分子内における磁気異方性の良否という面で議論をされてきた。一方で、分子が集積することによって形成される結晶において、結晶を伝わる熱振動がタンう分子磁石の磁気特性に大きく影響することが知られており、特に結晶内に観測される低エネルギーの熱振動（格子振動）のなす役割について近年盛んに議論されている。本研究では結晶工学的な手法に基づいて遅い磁化緩和の特性向上を議論しており、今後の単分子磁石の分子デバイスへの応用に向けて、磁気特性の向上への指針を示すことに成功している。
|
