書誌事項
- 公開日
- 1997-02
- 権利情報
-
- https://www.elsevier.com/tdm/userlicense/1.0/
- DOI
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- 10.1016/s0379-6779(97)81076-4
- 公開者
- Elsevier BV
この論文をさがす
説明
Abstract λ-(BETS) 2 FeCl 4 , where BETS is bis(ethylenedithio)tetraselenafulalene, is an organic molecular metal with magnetic anions. It undergoes a metal-insulator transition at about T M−I ∼ 8 K . This insulating state can be suppressed and a metallic or highly-conducting state can be restored by applying external magnetic field higher than 10 T. The nature of this phase transition and the ground state, whether a spin-Peierls or antiferromagnet, has not been clarified. In this paper, we report the anisotropy of magnetic properties of λ-(BETS) 2 FeCl 4 studied using SQUID magnetometer. The temperature dependence of the static magnetic susceptibility below T M−I was found to show a strong field dependence when the field is applied parallel to the crystalline long axis (H//c). The nonlinear behavior in magnetization (M-H), reminiscent of a spin-flop transition of antiferromagnet, is observed at magnetic fields around 1 T, well below the field necessary for restoration of highly-conducting state. This strong field dependence is absent for other magnetic field directions, suggesting that the ground state of λ-(BETS) 2 FeCl 4 is antiferromagnet rather than spin-Peierls.
収録刊行物
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- Synthetic Metals
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Synthetic Metals 86 (1-3), 2161-2162, 1997-02
Elsevier BV
