Superconductivity of Ca(Al0.5,Si0.5)2, a ternary silicide with the AlB2-type structure

被引：125

作者：

Imai, M ^{[1
]}

Nishida, K ^{[1
]}

Kimura, T ^{[1
]}

Abe, H ^{[1
]}

机构：

[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

来源：

APPLIED PHYSICS LETTERS | 2002年 / 80卷 / 06期

关键词：

D O I：

10.1063/1.1448857

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A ternary silicide Ca(Al-0.5,Si-0.5)(2) was prepared by Ar arc melting. Powder x-ray diffraction measurement indicates that it has the AlB2-type structure with lattice constants of a=4.1905(5) and c=4.3992(8) Angstrom, where Si and Al atoms are arranged in the disordered honeycomb lattice and Ca atoms are intercalated between them. The silicide is isostructural with a superconductor MgB2. Electrical resistivity and dc magnetization measurements revealed that it is a superconductor with a T-C of 7.7 K. (C) 2002 American Institute of Physics.

引用

收藏

页码：1019 / 1021

页数：3

相关论文

共 26 条

[1] LOW-TEMPERATURE TRANSPORT-PROPERTIES OF ULTRATHIN COSI2 EPITAXIAL-FILMS [J].

BADOZ, PA ;

BRIGGS, A ;

ROSENCHER, E ;

DAVITAYA, FA ;

DANTERROCHES, C .

APPLIED PHYSICS LETTERS, 1987, 51 (03) :169-171

[2] The crystal structure of calcium silicide CaSi2 [J].

Bohm, J ;

Hassel, O .

ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 1927, 160 (1/3) :152-164

[3] Structural phase transitions in CaSi2 under high pressure [J].

Bordet, P ;

Affronte, M ;

Sanfilippo, S ;

Núñez-Regueiro, M ;

Laborde, O ;

Olcese, GL ;

Palenzona, A ;

Le Floch, S ;

Levy, D ;

Hanfland, M .

PHYSICAL REVIEW B, 2000, 62 (17) :11392-11397

[4] BETA-POLYMORPHS OF URANIUM AND THORIUM DISILICIDES [J].

BROWN, A ;

NORREYS, JJ .

NATURE, 1959, 183 (4662) :673-673

[5] GROWTH OF SUPERCONDUCTING V3SI ON SI BY MOLECULAR-BEAM EPITAXIAL TECHNIQUES [J].

CROKE, ET ;

HAUENSTEIN, RJ ;

MCGILL, TC .

APPLIED PHYSICS LETTERS, 1988, 53 (06) :514-516

[6] UNUSUAL VARIABILITY OF THE LATTICE-CONSTANT IN POLYCRYSTALLINE EPITAXIAL-GROWTH OF SUPERCONDUCTING A15 NB-SI [J].

FELDMAN, RD ;

OPILA, RL ;

GEBALLE, TH ;

CELASCHI, S .

THIN SOLID FILMS, 1986, 137 (02) :315-324

[7]

GLADYSHEVSKII EI, 1967, UKRAINSKII FIZICHNII, V0012

[8] THE SUPERCONDUCTIVITY OF SOME TRANSITION METAL COMPOUNDS [J].

HARDY, GF ;

HULM, JK .

PHYSICAL REVIEW, 1954, 93 (05) :1004-1016

[9]

Hofmann W, 1936, Z PHYS CHEM B-CHEM E, V31, P214

[10] Superconductivity of ternary silicide with the AlB2-type structure Sr(Ga0.37, Si0.63)2 -: art. no. 077003 [J].

Imai, M ;

Abe, E ;

Ye, JH ;

Nishida, K ;

Kimura, T ;

Honma, K ;

Abe, H ;

Kitazawa, H .

PHYSICAL REVIEW LETTERS, 2001, 87 (07) :77003-1