OBSERVATION OF SUPERSTRUCTURES ON THE SURFACES OF SPUTTERED YBA2CU3O7-X THIN-FILMS BY LOW-ENERGY ELECTRON-DIFFRACTION

被引：6

作者：

BEHNER, H ^{[1
]}

RAUCH, W ^{[1
]}

GORNIK, E ^{[1
]}

机构：

[1] TECH UNIV MUNICH,WALTER SCHOTTKY INST,W-8046 GARCHING,GERMANY

来源：

APPLIED PHYSICS LETTERS | 1992年 / 61卷 / 12期

关键词：

D O I：

10.1063/1.107519

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The surface structures of sputtered c-axis-oriented YBa2Cu3O7-x (YBCO) thin films were studied by means of low-energy diffraction (LEED). The in situ analysis, without exposing the films to air, showed the formation of superstructures of the YBCO (001) 2 X 2 and YBCO (001) 4 X 1 type. Air-exposed surfaces showed no LEED pattern but could be transformed into the YBCO (001) 2 X 2 structure by annealing at 500-degrees-C. The observed superstructures are interpreted as being due to oxygen loss of the YBCO surface region, causing an oxygen vacancy ordering in the basal CuO planes.

引用

页码：1465 / 1467

页数：3

共 10 条

[1]

ALARIOFRANCO MA, 1988, PHYSICA C, V156, P455, DOI 10.1016/0921-4534(88)90771-X

[2] SURFACE-LAYERS ON SUPERCONDUCTING Y-BA-CU-O FILMS STUDIED WITH X-RAY PHOTOELECTRON-SPECTROSCOPY [J].

CHANG, CC ;

HEGDE, MS ;

WU, XD ;

DUTTA, B ;

INAM, A ;

VENKATESAN, T ;

WILKENS, BJ ;

WACHTMAN, JB .

JOURNAL OF APPLIED PHYSICS, 1990, 67 (12) :7483-7487

[3] SURFACE-COMPOSITION OF CLEAN, EPITAXIAL THIN-FILMS OF YBA2CU3O7-X FROM QUANTITATIVE X-RAY PHOTOEMISSION SPECTROSCOPY ANALYSIS [J].

FRANK, G ;

ZIEGLER, C ;

GOPEL, W .

PHYSICAL REVIEW B, 1991, 43 (04) :2828-2834

[4] ATMOSPHERIC DETERIORATION OF CLEAN SURFACE OF EPITAXIAL (001)-YBACUO FILMS STUDIED BY LOW-ENERGY ELECTRON-DIFFRACTION [J].

OHARA, T ;

SAKUTA, K ;

KAMISHIRO, M ;

KOBAYASHI, T .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 1991, 30 (12B) :L2085-L2087

[5] DC-MAGNETRON SPUTTERING OF YBA2CU3O7-DELTA THIN-FILMS FOR MICROWAVE APPLICATIONS [J].

RAUCH, W ;

BEHNER, H ;

GIERES, G ;

SOLKNER, G ;

FOX, F ;

VALENZUELA, AA ;

GORNIK, E .

PHYSICA C, 1992, 198 (3-4) :389-396

[6]

SHAREN MJ, 1991, JPN J APPL PHYS, V30, pL15

[7] ANGLE-RESOLVED PHOTOEMISSION-STUDIES OF SINGLE-CRYSTAL YBA2CU3O7-X [J].

STOFFEL, NG ;

CHANG, Y ;

KELLY, MK ;

DOTTL, L ;

ONELLION, M ;

MORRIS, PA ;

BONNER, WA ;

MARGARITONDO, G .

PHYSICAL REVIEW B, 1988, 37 (13) :7952-7955

[8] SURFACE-ANALYSIS OF C-AXIS-ORIENTED YBA2CU3O7-X THIN-FILMS BY QMS, XPS AND LEED - EFFECTS OF IN-VACUUM ANNEALING [J].

TANAKA, S ;

NAKAMURA, T ;

IIYAMA, M ;

YOSHIDA, N ;

TAKANO, S .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 1991, 30 (8B) :L1458-L1461

[9] LOW-ENERGY ION-SCATTERING SPECTROSCOPY OBSERVATIONS OF C-AXIS-ORIENTED YBA2CU3O7-X THIN-FILMS - EFFECTS OF IN-VACUUM ANNEALING [J].

TANAKA, S ;

NAKAMURA, T ;

IIYAMA, M ;

YOSHIDA, N ;

TAKANO, S ;

SHOJI, F ;

OURA, K .

APPLIED PHYSICS LETTERS, 1991, 59 (27) :3637-3639

[10] DIFFRACTION EVIDENCE FOR OXYGEN-VACANCY ORDERING IN ANNEALED BA2YCU3O7-DELTA(0.3LESS-THAN-DELTA-OR-EQUAL-TO0.4) SUPERCONDUCTORS [J].

WERDER, DJ ;

CHEN, CH ;

CAVA, RJ ;

BATLOGG, B .

PHYSICAL REVIEW B, 1988, 37 (04) :2317-2319

← 1 →