Superconducting and anomalous electron transport properties and electronic structure of BaNbO3-x and Ba2Nb5Ox films -: art. no. 174512

被引：16

作者：

Gasparov, VA ^{[1
]}

Ermolov, SN

Strukova, GK

Sidorov, NS

Khassanov, SS

Wang, HS

Schneider, M

Glaser, E

Richter, W

机构：

[1] Russian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, Russia

[2] Penn State Univ, Dept Phys, University Pk, PA 16802 USA

[3] Univ Jena, Inst Festkorperphys, D-07743 Jena, Germany

来源：

PHYSICAL REVIEW B | 2001年 / 63卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.63.174512

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated the superconducting (T-c,J(c),H-c2), electron transport, structural [x-ray diffraction (XRD), Rutherford backscattering spectrometry (RBS)], and surface [x-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy (UPS)] properties of BaNbO3-x and Ba2Nb5Ox epitaxial and oriented thin films grown on different substrates (Al2O3, NdGaO3, SrTiO3, and YSZ). Superconducting films with T-c = 14 K and unusually high H-c2(0) = 28 T have been prepared on Al2O3 substrates. At the same time, films on NdGaO3 exhibit behavior similar to granular superconductors, while strong pure metal electron transport behavior of the films on SrTiO3 was observed. XPS and RES investigations show that the composition of these films is almost the same, while UPS study evidenced the Fermi edge position corresponding to semimetallic behavior of the films for all substrates.

引用

页码：1745121 / 1745129

页数：9

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