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Magnetic torque and ac and dc magnetic susceptibility measurements on PTMA0.5[Fe(Pc)(CN)2]・CH3CN: Origin of spontaneous magnetization in [Fe(Pc)(CN)2] molecular conductors
Title: | Magnetic torque and ac and dc magnetic susceptibility measurements on PTMA0.5[Fe(Pc)(CN)2]・CH3CN: Origin of spontaneous magnetization in [Fe(Pc)(CN)2] molecular conductors |
Authors: | Tajima, Hiroyuki Browse this author | Yoshida, Gosuke Browse this author | Matsuda, Masaki Browse this author | Yamaura, Jun-Ichi Browse this author | Hanasaki, Noriaki Browse this author | Naito, Toshio Browse this author →KAKEN DB | Inabe, Tamotsu Browse this author |
Keywords: | antiferromagnetic materials | ferrimagnetic materials | Heisenberg model | magnetic susceptibility | magnetisation | organic compounds | torque |
Issue Date: | Jul-2009 |
Publisher: | American Physical Society |
Journal Title: | Physical Review B |
Volume: | 80 |
Issue: | 2 |
Start Page: | 024424 |
Publisher DOI: | 10.1103/PhysRevB.80.024424 |
Abstract: | Magnetic torque (3≤T≤46 K), dc magnetic susceptibility (2≤T≤300 K), and ac magnetic susceptibility (2≤T≤30 K) are reported for PTMA0.5[Fe(Pc)(CN)2]・CH3CN. The torque curves exhibit a sinusoidal line shape for temperatures above 6 K. This result as well as the temperature dependence of the dc magnetic susceptibility above 13 K was analyzed by employing an anisotropic Heisenberg model in one dimension. The compound exhibits spontaneous magnetization below 6 K. The torque measurements at 3 K revealed that the direction of this spontaneous magnetization is parallel to the easy axis of the mother antiferromagnetism. The ac susceptibility measurements demonstrated the fluctuation of the spontaneous magnetization up to 13 K. A model of charge-ordered ferrimagnetism is proposed in order to explain these results. This model explains the spontaneous magnetization which commonly appears in conducting salts of [Fe(Pc)(CN)2] and their derivatives. |
Rights: | ©2009 The American Physical Society |
Type: | article |
URI: | http://hdl.handle.net/2115/39046 |
Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 稲辺 保
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