A coupled metal-insulator and antiferromagnetic transition of λ-(BETS)2FeCl4 under high-pressure and magnetic field [BETS = bis(ethylenedithio)tetraselenafulvalene]

被引：23

作者：

Akutsu, H ^{[1
]}

Kato, K

Arai, E

Kobayashi, H

Kobayashi, A

Tokumoto, M

Brossard, L

Cassoux, P

机构：

[1] Inst Mol Sci, Okazaki, Aichi 444, Japan

[2] Univ Tokyo, Sch Sci, Dept Chem, Bunkyo Ku, Tokyo 113, Japan

[3] Electrotech Lab, Tsukuba, Ibaraki 305, Japan

[4] Inst Natl Sci Appl, SNCMP, UMR CNRS 5646, Phys Mat Condensee Lab, F-31077 Toulouse, France

[5] CNRS, Chim Coordinat Lab, F-31077 Toulouse, France

来源：

SOLID STATE COMMUNICATIONS | 1998年 / 105卷 / 08期

关键词：

organic crystals; metals; magnetically ordered materials; phase transitions;

D O I：

10.1016/S0038-1098(97)10189-2

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The magnetoresistance of lambda-(BETS)(2)FeCl4 was measured along the needle axis of the crystal to determine the pressure and magnetic field dependences of the coupled metal-insulator and antiferromagnetic transition temperature (T-MI, T-N) T-MI decreases when applying pressure and/or magnetic field. The T-MI vs H curve shows an inflection point (H-1). The anomaly observed around 1 T (H-1) corresponds to the spin-flop transition observed by the SQUID measurements. The magnetization (M) of the oriented polycrystalline sample of lambda-(BETS)(2)FeCl4 was measured at 2-15 K in a magnetic field of 0.01-7 T. The magnitude of the characteristic drop of M observed for the field parallel to the c axis (Delta M-parallel to) becomes small above 1.2 T but remains almost constant above 4.5 T. (C) 1998 Elsevier Science Ltd.

引用

页码：485 / 489

页数：5

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