Oxygen nonstoichiometry of MBE-grown cuprate films to lose or give high-Tc superconductivity

被引：8

作者：

Naito, M ^{[1
]}

Sato, H ^{[1
]}

Yamamoto, H ^{[1
]}

机构：

[1] NTT, Basic Res Labs, Atsugi, Kanagawa 2430198, Japan

来源：

SUPERCONDUCTING AND RELATED OXIDES: PHYSICS AND NANOENGINEERING III | 1998年 / 3481卷

关键词：

high-T-c superconductors; oxygen nonstoichiometry; surface/interface analysis; (Nd; Ce)(2)CuO4; La2CuO4+delta; Ba2CuO4-delta;

D O I：

10.1117/12.335878

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper describes our recent progress in MBE growth and the surface/interface investigation of high-T-c superconducting films. The careful XPS analyses of the in-situ surface and interface reaction for MBE grown (Nd,Ce)(2)CuO4 films demonstrate that correct oxygen stoichiometry is the most crucial issue in preparing high-quality films and improving the characteristics of tunnel junctions. In other words, oxygen nonstoichiometry easily occurs at the surface or interface in cuprates. By utilizing this fact in a positive way, we have succeeded in preparing of the highest quality La2CuO4+delta films ever and have discovered a new superconducting Ba2CuO4+delta film by a simple and efficient oxidation process using ozone in a vacuum chamber.

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收藏

页码：214 / 225

页数：12

相关论文

共 23 条

[1] SOME EQUILIBRIUM RELATIONSHIPS IN THE BARIUM RICH PART OF THE BAO-CUO-O SYSTEM [J].

ABBATTISTA, F ;

VALLINO, M ;

BRISI, C ;

LUCCOBORLERA, M .

MATERIALS RESEARCH BULLETIN, 1988, 23 (10) :1509-1520

[2] INCORPORATION OF CARBON INTO INFINITE-LAYER BACUO2 FILMS AND FORMATION OF SUPERCONDUCTING PHASE [J].

ADACHI, H ;

SAKAI, M ;

SATOH, T ;

SETSUNE, K .

PHYSICA C, 1995, 244 (3-4) :282-286

[3] THE 1ST SUPERCONDUCTING THIN-FILM OXYCARBONATES - COHERENT INTERGROWTH OF SEVERAL MEMBERS OF A NEW STRUCTURAL SERIES (CACUO2)M(BA2CUO2CO3)N [J].

ALLEN, JL ;

MERCEY, B ;

PRELLIER, W ;

HAMET, JF ;

HERVIEU, M ;

RAVEAU, B .

PHYSICA C, 1995, 241 (1-2) :158-166

[4] STRUCTURAL COMPARISON OF ND2-XCEXCUO4-Y SINGLE-CRYSTALS AND POLYCRYSTALS [J].

BEESABATHINA, DP ;

SALAMANCARIBA, L ;

PENG, JL ;

LI, ZY ;

GREENE, RL .

PHYSICA C, 1993, 208 (1-2) :79-85

[5] PREPARATION, MAGNETIZATION AND ELECTRICAL-RESISTIVITY OF ELECTROCHEMICALLY OXIDIZED LA2CUO4+DELTA SINGLE-CRYSTALS [J].

CHOU, FC ;

JOHNSTON, DC ;

CHEONG, SW ;

CANFIELD, PC .

PHYSICA C, 1993, 216 (1-2) :66-76

[6] EXAFS EVIDENCE OF INTERSTITIAL OXYGEN DEFECTS IN ND2CUO4+DELTA [J].

GHIGNA, P ;

SPINOLO, G ;

FILIPPONI, A ;

CHADWICK, AV ;

HANMER, P .

PHYSICA C, 1995, 246 (3-4) :345-350

[7] TUNNELING EVIDENCE FOR PREDOMINANTLY ELECTRON PHONON COUPLING IN SUPERCONDUCTING BA1-XKXBIO3 AND ND2-XCEXCUO4-Y [J].

HUANG, Q ;

ZASADZINSKI, JF ;

TRALSHAWALA, N ;

GRAY, KE ;

HINKS, DG ;

PENG, JL ;

GREENE, RL .

NATURE, 1990, 347 (6291) :369-372

[8] THE PHASE-STABILITY DIAGRAMS FOR THE SYSTEMS ND2CUO4-DELTA AND ND1.85CE0.15CUO4-DELTA [J].

KIM, JS ;

GASKELL, DR .

PHYSICA C, 1993, 209 (04) :381-388

[9]

KIPKA R, 1977, Z NATURFORSCH B, V32, P121

[10] 2-DIMENSIONAL LASER MOLECULAR-BEAM EPITAXY AND CARRIER MODULATION OF INFINITE-LAYER BACUO2 FILMS [J].

MAEDA, T ;

YOSHIMOTO, M ;

SHIMOZONO, K ;

KOINUMA, H .

PHYSICA C, 1995, 247 (1-2) :142-146