Phase diagram and crystal growth of La2CuO4

被引：3

作者：

Chen, CK ^{[1
]}

Kosseva, I ^{[1
]}

Hargreave, T ^{[1
]}

Wondre, F ^{[1
]}

Hodby, JW ^{[1
]}

Wanklyn, BM ^{[1
]}

机构：

[1] UNIV SUSSEX,SCH PHYS & MOL SCI,BRIGHTON BN1 9QH,E SUSSEX,ENGLAND

来源：

PHYSICA C | 1997年 / 282卷

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1016/S0921-4534(97)00306-7

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Phase diagrams of La2CuO4- CuO in air and in flowing oxygen are established by differential thermal analysis (DTA), in which the liquidus line for the crystal growth of La2CuO4 is determined by the improved thermogravimetric analysis (ITGA). Referring to the phase diagram, suitable temperature program and starting composition are applied to the crystal growth. As a result, single crystals with size up to 10x8x6 mm(3) have been obtained by spontaneous nucleation. After oxygenation at 1 kbar oxygen pressure at 800 degrees C, the crystal with elongated C-parameter becomes superconducting with the main transition temperature of 20 K.

引用

页码：445 / 446

页数：2

共 4 条

[1] PHASE-DIAGRAM AND SINGLE-CRYSTAL GROWTH OF (LA,SR)2CUO4 FROM CUO SOLUTION [J].

CHEN, CK ;

WATTS, BE ;

WANKLYN, BM ;

THOMAS, PA ;

HAYCOCK, PW .

JOURNAL OF CRYSTAL GROWTH, 1988, 91 (04) :659-665

[2] EVOLUTION OF THE SUPERCONDUCTING PROPERTIES IN THE LA2CUO4 LATTICE VERSUS OXYGEN-PRESSURE [J].

DEMAZEAU, G ;

TRESSE, F ;

PLANTE, T ;

CHEVALIER, B ;

ETOURNEAU, J ;

MICHEL, C ;

HERVIEU, M ;

RAVEAU, B ;

LEJAY, P ;

SULPICE, A ;

TOURNIER, R .

PHYSICA C, 1988, 153 :824-825

[3] STRUCTURE OF THE SUPERCONDUCTING LA2CUO4+DELTA PHASES (DELTA-APPROXIMATE-TO-0.08,0.12) PREPARED BY ELECTROCHEMICAL OXIDATION [J].

RADAELLI, PG ;

JORGENSEN, JD ;

SCHULTZ, AJ ;

HUNTER, BA ;

WAGNER, JL ;

CHOU, FC ;

JOHNSTON, DC .

PHYSICAL REVIEW B, 1993, 48 (01) :499-510

[4] SUPERCONDUCTIVITY AND PHASE-SEPARATION IN LA2CUO4+X SINGLE-CRYSTALS [J].

ZAKHAROV, AA ;

NIKONOV, AA ;

PARFIONOV, OE ;

TSETLIN, MB ;

GLASKOV, VM ;

REVINA, NV ;

BARILO, SN ;

ZHIGUNOV, DI ;

KURNEVITCH, LA .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 1994, 223 (1-2) :157-162

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