Mysterious Paramagnetic States of Fe 3d Spin in Antiferromagnetic Insulator of λ-BETS<SUB>2</SUB>FeCl<SUB>4</SUB> System
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- Akiba Hiroshi
- Department of Physics, Faculty of Science, Toho University
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- Nakano Shinto
- Department of Physics, Faculty of Science, Toho University
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- Nishio Yutaka
- Department of Physics, Faculty of Science, Toho University
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- Kajita Koji
- Department of Physics, Faculty of Science, Toho University
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- Zhou Biao
- Department of Humanities and Sciences, Nihon University
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- Kobayashi Akiko
- Department of Humanities and Sciences, Nihon University
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- Kobayashi Hayao
- Department of Humanities and Sciences, Nihon University
Bibliographic Information
- Other Title
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- Mysterious paramagnetic states of Fe 3d spin in antiferromagnetic insulator of λ-BETS2FeCl4 system
- Mysterious paramagnetic states of Fe 3d spin in antiferromagnetic insulator of l BETS2FeCl4 system
- Mysterious paramagnetic states of Fe 3d spin in antiferromagnetic insulator of κ-BETS2FeCl4system
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Abstract
In this study, we have investigated a quasi-two-dimensional organic conductor, λ-BETS2FeCl4, that exhibits a phase transition from a paramagnetic metal to an antiferromagnetic (AF) insulator at a critical temperature (TMI∼8.3 K). To investigate the mechanism of a notable phase transition, we studied the thermal properties of the conductor for temperatures down to 0.2 K at zero magnetic field. We observed that the specific heat of the conductor showed a sharp peak at TMI and a Schottky-type hump. The temperature dependence of the excess specific heat clarifies that π and 3d spins do not cooperatively form an AF order at TMI. We concluded that a 3d spin system keeps a paramagnetic state even at the lowest studied temperature.
Journal
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 78 (3), 033601-033601, 2009
THE PHYSICAL SOCIETY OF JAPAN
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Details 詳細情報について
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- CRID
- 1390282679173286656
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- NII Article ID
- 130005437352
- 110007138895
- 210000107691
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- NII Book ID
- AA00704814
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- ISSN
- 13474073
- 00319015
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- NDL BIB ID
- 10182602
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed