Ordered oxygen phases in epitaxial Nb(110) layers

被引：8

作者：

Hellwig, O ^{[1
]}

Becker, HW

Zabel, H

机构：

[1] Ruhr Univ Bochum, Inst Expt Phys Festkorperphys, D-44780 Bochum, Germany

[2] Ruhr Univ Bochum, Inst Expt Phys Ionenstrahlphys, D-44780 Bochum, Germany

来源：

PHYSICAL REVIEW B | 2001年 / 64卷 / 23期

关键词：

D O I：

10.1103/PhysRevB.64.233404

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Synchrotron x-ray diffraction studies during the atmospheric oxidation of epitaxial Nb(110) thin films at elevated temperature reveal the formation of highly ordered oxygen phases within the Nb(110) lattice: The oxygen is stored on interstitial lattice sites leading to an out-of-plane expansion of up to 4.3% without destroying the basic structure of the Nb host lattice. During a complete oxidation process of a 5000 Angstrom Nb layer we observe the formation of a nonordered lattice gas phase succeeded by a well defined sequence of oxygen superstructures until finally the whole film is transformed into amorphous Nb2O5.

引用

页数：4

共 11 条

[1] ON THE NATURAL NB2O5 GROWTH ON NB AT ROOM-TEMPERATURE [J].

GRUNDNER, M ;

HALBRITTER, J .

SURFACE SCIENCE, 1984, 136 (01) :144-154

[2] ARXPS ANALYSIS AND OXIDATION OF NIOBIUM COMPOUNDS [J].

HALBRITTER, J .

ELECTROCHIMICA ACTA, 1989, 34 (08) :1153-1155

[3] ON THE OXIDATION AND ON THE SUPERCONDUCTIVITY OF NIOBIUM [J].

HALBRITTER, J .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 1987, 43 (01) :1-28

[4] Oxidation of Nb(110) thin films on a-plane sapphire substrates: an X-ray study [J].

Hellwig, O ;

Zabel, H .

PHYSICA B, 2000, 283 (1-3) :228-231

[5]

HJORVARSSON B, COMMUNICATION

[6] STRUCTURE OF A NB OXIDE TUNNEL BARRIER IN A JOSEPHSON JUNCTION [J].

KUAN, TS ;

RAIDER, SI ;

DRAKE, RE .

JOURNAL OF APPLIED PHYSICS, 1982, 53 (11) :7464-7470

[7]

NEUMAN RC, 1999, MAT RES B, V24, P12

[8] 298 K operation of Nb/Nb oxide-based single-electron transistors with reduced size of tunnel junctions by thermal oxidation [J].

Shirakashi, J ;

Matsumoto, K ;

Miura, N ;

Konagai, M .

JOURNAL OF APPLIED PHYSICS, 1998, 83 (10) :5567-5569

[9] EFFECT OF OXYGEN SEGREGATION ON THE SURFACE-STRUCTURE OF SINGLE-CRYSTALLINE NIOBIUM FILMS ON SAPPHIRE [J].

SURGERS, C ;

VONLOHNEYSEN, H .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 1992, 54 (04) :350-354

[10] Oxygen-induced surface structure of Nb(110) [J].

Sürgers, C ;

Schöck, M ;

von Löhneysen, H .

SURFACE SCIENCE, 2001, 471 (1-3) :209-218

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