Anisotropy of the upper critical field of the organic superconductor λ-(BETS)2GaCl4

被引：42

作者：

Tanatar, MA ^{[1
]}

Ishiguro, T

Tanaka, H

Kobayashi, A

Kobayashi, H

机构：

[1] Kyoto Univ, Dept Phys, Sakyo Ku, Kyoto 6068502, Japan

[2] Japan Sci & Technol Corp, Kawaguchi 3320012, Japan

[3] Univ Tokyo, Sch Sci, Dept Chem, Bankyo Ku, Tokyo 1130033, Japan

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

来源：

JOURNAL OF SUPERCONDUCTIVITY | 1999年 / 12卷 / 03期

关键词：

organic superconductors; BETS; superconductivity; critical field; anisotropy;

D O I：

10.1023/A:1007728000531

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The upper critical field Ba of the organic superconductor lambda-(BETS)(2)GaCl4 has been determined from resistance measurements for orientation of the magnetic field along three perpendicular crystallographic directions. The Ginzburg-Landau coherence length was estimated from the slope of B-c2(T) curve near T-c as 12.5 nm, 1.6 nm, and 12.5 nm for the a*-, b*-, and c-directions. Angular dependence of the critical field within highly conducting ac plane at 1.5 K was shown to possess two-fold symmetry, which can be related to the band structure anisotropy.

引用

页码：511 / 514

页数：4

共 11 条

[1] Highly correlated organic conductor with magnetic anions exhibiting a π-d coupled metal-insulator transition, λ-(BETS)2FeBrxCl4-x (BETS = bis(ethylenedithio)tetraselenafulvalene) [J].

Akutsu, H ;

Arai, E ;

Kobayashi, H ;

Tanaka, H ;

Kobayashi, A ;

Cassoux, P .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1997, 119 (51) :12681-12682

[2] NEW ORGANIC METALS BASED ON BETS COMPOUNDS WITH MX4- ANIONS (BETS=BIS(ETHYLENEDITHIO)TETRASELENAFULVALENE - M = GA, FE, IN X = CL, BR) [J].

KOBAYASHI, A ;

UDAGAWA, T ;

TOMITA, H ;

NAITO, T ;

KOBAYASHI, H .

CHEMISTRY LETTERS, 1993, (12) :2179-2182

[3] NEW ORGANIC SUPERCONDUCTOR, LAMBDA-(BETS)(2)GACL4 AND METAL-INSULATOR-TRANSITION OF BETS CONDUCTOR WITH MAGNETIC ANIONS (BETS=BIS(ETHLENEDITHIO)TETRASELENAFULVALENE) [J].

KOBAYASHI, H ;

TOMITA, H ;

UDAGAWA, T ;

NAITO, T ;

KOBAYASHI, A .

SYNTHETIC METALS, 1995, 70 (1-3) :867-870

[4] NEW ORGANIC SUPERCONDUCTOR, LAMBDA-BETS(2)GABRCL(3) [BETS=BIS(ETHYLENEDITHIO)TETRASELENAFULVALENE] [J].

KOBAYASHI, H ;

TOMITA, H ;

NAITO, T ;

TANAKA, H ;

KOBAYASHI, A ;

SAITO, T .

JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1995, (12) :1225-1226

[5] Electric and magnetic properties and phase diagram of a series of organic superconductors lambda-BETS2GaXzY4-z [BETS=bis(ethylenedithiotetraselenafulvalene; X, Y=F, Cl, Br; 0<z<2)] [J].

Kobayashi, H ;

Akutsu, H ;

Arai, E ;

Tanaka, H ;

Kobayashi, A .

PHYSICAL REVIEW B, 1997, 56 (14) :R8526-R8529

[6] Structural and electrical properties of a series of organic superconductors lambda-BETS2GaXzY4-z (X=Br, Cl, F; 0<z<4) [J].

Kobayashi, H ;

Arai, E ;

Naito, T ;

Tanaka, H ;

Kobayashi, A ;

Saito, T .

SYNTHETIC METALS, 1997, 85 (1-3) :1463-1464

[7]

Kushch ND, 1996, J PHYS I, V6, P1997, DOI 10.1051/jp1:1996200

[8] Nonanalytical magnetoresistance, the third angular effect, and a method to investigate Fermi surfaces in quasi-two-dimensional conductors [J].

Lebed, AG ;

Bagmet, NN .

PHYSICAL REVIEW B, 1997, 55 (14) :R8654-R8657

[9] SYNTHESIS, SUPERCONDUCTIVITY, X-RAY STRUCTURE AND ELECTRONIC BAND-STRUCTURE OF LAMBDA-(BETS)(2)GACL4 [J].

MONTGOMERY, LK ;

BURGIN, T ;

HUFFMAN, JC ;

REN, J ;

WHANGBO, MH .

PHYSICA C, 1994, 219 (3-4) :490-496

[10]

TANATAR MA, IN PRESS SYNTH METAL

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