SYNTHESIS AND CHARACTERIZATION OF REDUCED NIOBATES [SR1-XLNXNB2O6, LN=LA, ND]

被引：14

作者：

ISTOMIN, SY ^{[1
]}

DYACHENKO, OG ^{[1
]}

ANTIPOV, EV ^{[1
]}

SVENSSON, G ^{[1
]}

NYGREN, M ^{[1
]}

机构：

[1] UNIV STOCKHOLM,ARRHENIUS LAB,DEPT INORGAN CHEM,S-10691 STOCKHOLM,SWEDEN

来源：

MATERIALS RESEARCH BULLETIN | 1994年 / 29卷 / 07期

关键词：

NIOBIUM; LANTHANOIDES; STRONTIUM; MIXED OXIDES;

D O I：

10.1016/0025-5408(94)90199-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Sr1-xLnxNb2O6, Ln = La (x less-than-or-equal-to 0.4), Nd (x less-than-or-equal-to 0.3) solid solutions with a CaTa2O6-type structure have been studied. No superconductivity was found in the prepared samples down to 5K. The CaTa2O6 type crystal structure of Sr0.6La0.4Nb2O6 was refined from X-ray powder diffraction data: R(i)=0.054, R(p)=0.117. The oxidation process of the lanthanum-containing compounds was studied. A drastical decrease of the lanthanum content, accompanied by the formation of the cation vacancies at the Sr/La site occurs during oxidation.

引用

页码：743 / 749

页数：7

共 10 条

[1] A NEW NON-CU-OXIDE SUPERCONDUCTOR - (SR1-XLNX)NB2O6-Y(LN-LA, ND, PR AND CE) [J].

AKIMITSU, J ;

AMANO, J ;

SAWA, H ;

NAGASE, O ;

GYODA, K ;

KOGAI, M .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 1991, 30 (7A) :L1155-L1156

[2] SUPERCONDUCTIVITY IN SR(LN)-NB-O SYSTEM (LN-LA,ND,PR,CE,GD AND HO) [J].

AKIMITSU, J ;

AMANO, J ;

TOMIMOTO, K ;

SUZUKI, T ;

KOGAI, M ;

FUKAWA, Y ;

SAWA, H ;

MATSUI, Y .

PHYSICA C, 1991, 185 :723-724

[3]

Akselrud L.G., 1989, THES REP 12 EUR CRYS, P155

[4] SUPERCONDUCTIVITY IN THE LAYERED COMPOUND LIXNBO2 [J].

GESELBRACHT, MJ ;

RICHARDSON, TJ ;

STACY, AM .

NATURE, 1990, 345 (6273) :324-326

[5]

JAHNBERG L, 1963, ACTA CHEM SCAND, V71, P2548

[6]

KELLERMAN DG, 1992, SVERKHPROVODIMOST FI, V5, P961

[7] POWDER DIFFRACTION STUDIES OF SRNB2O6 AND SRNB6O16 [J].

MARINDER, BO ;

WANG, PL ;

WERNER, PE .

ACTA CHEMICA SCANDINAVICA SERIES A-PHYSICAL AND INORGANIC CHEMISTRY, 1986, 40 (07) :467-475

[8]

SHANNON RD, 1969, ACTA CRYSTALLOGR B, V25, P725

[9]

TRUNOV VK, 1981, KRISTALLOGRAFIYA+, V26, P390

[10]

1970, GMELIN HDB ANORGA B1, P49

← 1 →