Interplay of magnetism and superconductivity in BETS conductors (BETS= bis(ethylenedithio)tetraselenafulvalene)

被引：5

作者：

Kobayashi, H ^{[1
]}

Zhang, B

Tanaka, H

Fujiwara, H

Otsuka, T

Fujiwara, E

Kobayashi, A

机构：

[1] Inst Mol Sci, Okazaki, Aichi 4448585, Japan

[2] Univ Tokyo, Res Ctt Spectrochem, Grad Sch Sci, Bunkyo Ku, Tokyo 1130033, Japan

来源：

SYNTHETIC METALS | 2003年 / 137卷 / 1-3期

关键词：

superconducting phase transitions; magnetic phase transitions; magnetic measurements; organic superconductors; organic conductors based on radical cation and/or anion salts;

D O I：

10.1016/S0379-6779(02)01034-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Electromagnetic properties of organic superconductors based on BETS [=bis(ethylenedithio)tetraselenafulvalene)] and MX4- (M=Fe, Ga; X=Cl, Br) were examined. Based on the results of resistivity measurements, the temperature-pressure-composition phase diagram of lambda-(BETS)(2)FexGa1-xBryCl4-y was determined. Due to the existence of Fe3+ ions, the crystal of lambda-(BETS)(2)FexGa1-xCl4 (x=0.4) exhibiting a superconductor-to-insulator transition showed an unprecedented resistivity behavior under magnetic field. lambda-(BETS)(2)Fe0.4Ga0.6Cl4 exhibited the successive insulator-->superconductor-->metal-->(field-induced) superconducting transitions with increasing the magnetic field parallel to the conduction plane up to 15 T and the insulator-->superconductor-->metal transitions for the field perpendicular to the conduction plane. The magnetoresistance experiments on the first antiferromagnetic organic superconductor, kappa-(BETS)(2)FeBr4 down to 0.58 K disclosed an onset of field-induced superconducting transition around 12.5 T.

引用

页码：1157 / 1162

页数：6

共 30 条

[1] Coupling of metal-insulator and antiferromagnetic transitions in the highly correlated organic conductor incorporating magnetic anions, λ-BETS2FeBrxCl4-x[BETS = Bis(ethylenedithio)tetraselenafulvalene] [J].