DESTABILIZATION OF 124 AND 247 PHASES OF Y-BA-CU-O BY FE SUBSTITUTION AT ELEVATED OXYGEN PRESSURES

被引：28

作者：

MORRIS, DE

MARATHE, AP

SINHA, APB

机构：

[1] 2-300 Lawrence Berkely Laboratory, Berkeley

来源：

PHYSICA C | 1990年 / 169卷 / 5-6期

关键词：

D O I：

10.1016/0921-4534(90)90581-X

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Single phase iron-substituted 124, (YBa2Cu4-xFexOy) has been obtained in the range of 0≤x≤0.05 at oxygen pressure of 200 bar and 100 bar. Greater Fe substitution at elevated P(O2) destabilised the 124 and 247 phases in favor of a tetragonal 123 phase (FeT-123). The solubility of Fe in FeT-123 phase increases with oxygen pressure. The lattice parameters do not change significantly with Fe content and P(O2). The formal average cooper valency (FACV) of single phase FeT-123 samples is high (e.g. FACV=2.58 for x=0.65). The reduction of Tc caused by Fe substitution in YBa2Cu3-xFexOy is about 6 K/%x over the range (0≤x≤0.2) for samples prepared at P(O2)=200 bar and cooled slowly under pressure. © 1990.

引用

页码：386 / 390

页数：5

共 11 条

[1]

FU T, 1989, J LESS-COMMON MET, V151, P213

[2] 8 NEW HIGH-TEMPERATURE SUPERCONDUCTORS WITH THE 1-2-4 STRUCTURE [J].

MORRIS, DE ;

NICKEL, JH ;

WEI, JYT ;

ASMAR, NG ;

SCOTT, JS ;

SCHEVEN, UM ;

HULTGREN, CT ;

MARKELZ, AG ;

POST, JE ;

HEANEY, PJ ;

VEBLEN, DR ;

HAZEN, RM .

PHYSICAL REVIEW B, 1989, 39 (10) :7347-7350

[3] STABILITY OF 124-SUPERCONDUCTOR, 123-SUPERCONDUCTOR, AND 247-SUPERCONDUCTOR [J].

MORRIS, DE ;

ASMAR, NG ;

NICKEL, JH ;

SID, RL ;

WEI, JYT ;

POST, JE .

PHYSICA C, 1989, 159 (03) :287-294

[4] CALCIUM-SUBSTITUTED Y-BA-CU-O SUPERCONDUCTORS WITH ENHANCED TC SYNTHESIZED AT ELEVATED OXYGEN PRESSURES [J].

MORRIS, DE ;

NARWANKAR, P ;

SINHA, APB ;

TAKANO, K ;

FAYN, B ;

SHUM, VT .

PHYSICAL REVIEW B, 1990, 41 (07) :4118-4122

[5] CA SUBSTITUTED TETRAGONAL 123 SUPERCONDUCTOR WITH TC ABOVE 85-K SYNTHESIZED IN 1-15 ATM OXYGEN OVERPRESSURE [J].

MORRIS, DE ;

NARWANKAR, PK ;

SINHA, APB .

PHYSICA C, 1990, 169 (1-2) :7-14

[6]

MORRIS DE, UNPUB APPL PHYS LETT

[7]

MORRIS DE, UNPUB PHYSICA C

[8]

PRADHAN S, 1990, B AM PHYS SOC, V35, P208

[9] CO AND FE SUBSTITUTION IN YBA2CU3O7-DELTA [J].

TAO, YK ;

SWINNEA, JS ;

MANTHIRAM, A ;

KIM, JS ;

GOODENOUGH, JB ;

STEINFINK, H .

JOURNAL OF MATERIALS RESEARCH, 1988, 3 (02) :248-256

[10] EFFECT OF FE ON THE SUPERCONDUCTIVITY OF THE BA-Y-CU OXIDE SYSTEM [J].

ZHAO, BR ;

SHI, YH ;

ZHAO, YY ;

LI, L .

PHYSICAL REVIEW B, 1988, 38 (04) :2486-2488

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