A new epitaxial BaSnO3 buffer layer for YBa2Cu3O7-δ thin films on MgO substrates

被引：11

作者：

Mukaida, M ^{[1
]}

Takano, Y ^{[1
]}

Chiba, K ^{[1
]}

Moriya, T ^{[1
]}

Kusunoki, M ^{[1
]}

Ohshima, S ^{[1
]}

机构：

[1] Yamagata Univ, Yonezawa, Yamagata 9928510, Japan

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 1999年 / 12卷 / 11期

关键词：

D O I：

10.1088/0953-2048/12/11/359

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

45 degrees grain boundaries, which drastically increase surface resistance (R-S) in superconducting YBa2Cu3O7-delta films for microwave devices on MgO substrates, are eliminated using a new buffer layer of BaSnO3. BaSnO3 buffer layers and YBa2Cu3O7-delta films are grown by ArF pulsed laser deposition. Epitaxial relationships among BaSnO3, YBa2Cu3O7-delta and MgO are confirmed by x-ray phi-scanning. The Rs values of the YBa2Cu3O7-delta films are measured using a dielectric resonator with 22 GHz TE011 mode. The epitaxial YBa2Cu3O7-delta films grown on BaSnO3 buffered MgO substrates show lower R-S than YBa2Cu3O7-delta films directly grown on MgO substrates. The BaSnO3 buffer layer which enables YBa2Cu3O7-delta films to grow without 45 degrees grain boundaries at a optimum film growth condition is attractive for microwave applications.

引用

页码：890 / 892

页数：3

共 5 条

[1]

CHALOUPKA H, 1990, FREQUENZ, V443, P141

[2] RESISTIVE LOSS AT 10 GHZ IN C-AXIS-ALIGNED INSITU-GROWN YBA2CU3O7 FILMS [J].

LADERMAN, SS ;

TABER, RC ;

JACOWITZ, RD ;

MOLL, JL ;

EOM, CB ;

HYLTON, TL ;

MARSHALL, AF ;

GEBALLE, TH ;

BEASLEY, MR .

PHYSICAL REVIEW B, 1991, 43 (04) :2922-2933

[3] ANNEALING TEMPERATURE-DEPENDENCE OF MGO SUBSTRATES ON THE QUALITY OF YBA2CU3OX FILMS PREPARED BY PULSED-LASER ABLATION [J].

MINAMIKAWA, T ;

SUZUKI, T ;

YONEZAWA, Y ;

SEGAWA, K ;

MORIMOTO, A ;

SHIMIZU, T .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 1995, 34 (8A) :4038-4042

[4] NATURE OF PREFERRED ORIENTATION OF YBA2CU3OX THIN-FILMS [J].

MUKAIDA, M ;

MIYAZAWA, S .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, 1993, 32 (10) :4521-4528

[5]

SUZUKI M, 1993, ADV SUPERCONDUCTIVIT, V3, P969

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