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Faculty of Engineering, Kyushu Institute of Technology, Kitakyushu 804-8550, Japan
Faculty of Engineering, Kyushu Institute of Technology, Kitakyushu 804-8550, Japan
Faculty of Engineering, Kyushu Institute of Technology, Kitakyushu 804-8550, Japan
Faculty of Engineering, Kyushu Institute of Technology, Kitakyushu 804-8550, Japan
CREST, Japan Science and Technology Agency (JST), Saitama 332-0012, Japan
Faculty of Engineering, Kyushu Institute of Technology, Kitakyushu 804-8550, Japan
CREST, Japan Science and Technology Agency (JST), Saitama 332-0012, Japan
CREST, Japan Science and Technology Agency (JST), Saitama 332-0012, Japan
抄録
We report the combined measurements of the dc susceptibility X0, the ac susceptibility X, and the NMR relaxation rate T for the molecular-based heterometallic single-chain magnet [Mn(saltmen)]2[Ni(pao)2(py)2](PF6)2. At low temperatures, this system is well described by a one-dimensional array of effective spin S=3 chains comprising the MnIII-NiII-MnIII trimers and treated as the S=3 Ising chain with the single-ion term (Blume-Capel model). Using the exact solution of the model and based on the picture that the random motion of the local domain walls dominates the low-temperature spin dynamics, we succeeded in reproducing the experimental results of the dc susceptibility X0, the ac susceptibility X, and the 19F-NMR relaxation rate T in a consistent manner.
雑誌名
Physical review B. Condensed matter and materials physics
巻
74
ページ
224419-1 - 224419-7
発行年
2006-12-15
出版者
Published by the American Physical Society through the American Institute of Physics
Spin correlation and relaxational dynamics in molecular-based single-chain magnets
224419.pdf
(190.83KB)
