In situ synthesis of MgB2 thin films for tunnel junctions

被引：29

作者：

Schneider, R ^{[1
]}

Geerk, J ^{[1
]}

Ratzel, F ^{[1
]}

Linker, G ^{[1
]}

Zaitsev, AG ^{[1
]}

机构：

[1] Forschungszentrum Karlsruhe, Inst Festkorperphys, D-76021 Karlsruhe, Germany

来源：

APPLIED PHYSICS LETTERS | 2004年 / 85卷 / 22期

关键词：

D O I：

10.1063/1.1828582

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

An approach to the in situ preparation of as-grown MgB2 thin films is presented. It comprises a conventional B sputter gun and a special Mg evaporator that provides a high Mg vapor pressure at the position of the substrate. Thin films deposited on r-plane sapphire substrates at a temperature of 440degreesC had a zero resistance T-c of 33 K and a residual resistivity of 111 muOmega cm. Sandwich-type tunnel junctions with a natural MgB2 oxide as the potential barrier were prepared for superconducting tunneling spectroscopy. Voltage-dependent conductance measurements revealed estimates of the barrier thickness, height, and shape. (C) 2004 American Institute of Physics.

引用

页码：5290 / 5292

页数：3

共 16 条

[1] Superconducting Mg-B films by pulsed-laser deposition in an in situ two-step process using multicomponent targets [J].

Blank, DHA ;

Hilgenkamp, H ;

Brinkman, A ;

Mijatovic, D ;

Rijnders, G ;

Rogalla, H .

APPLIED PHYSICS LETTERS, 2001, 79 (03) :394-396

[2] Anisotropic superconducting properties of MgB2 single crystals probed by in-plane electrical transport measurements -: art. no. 140501 [J].

Eltsev, Y ;

Lee, S ;

Nakao, K ;

Chikumoto, N ;

Tajima, S ;

Koshizuka, N ;

Murakami, M .

PHYSICAL REVIEW B, 2002, 65 (14) :1-4

[3] Experimental study of MgB2 decomposition [J].

Fan, ZY ;

Hinks, DG ;

Newman, N ;

Rowell, JM .

APPLIED PHYSICS LETTERS, 2001, 79 (01) :87-89

[4] MgB2 superconducting thin films with a transition temperature of 39 kelvin [J].

Kang, WN ;

Kim, HJ ;

Choi, EM ;

Jung, CU ;

Lee, SL .

SCIENCE, 2001, 292 (5521) :1521-1523

[5] Thermodynamics of the Mg-B system:: Implications for the deposition of MgB2 thin films [J].

Liu, ZK ;

Schlom, DG ;

Li, Q ;

Xi, XX .

APPLIED PHYSICS LETTERS, 2001, 78 (23) :3678-3680

[6]

McMillan Wl. L., 1969, SUPERCONDUCTIVITY, V1, P561

[7] Superconductivity at 39 K in magnesium diboride [J].

Nagamatsu, J ;

Nakagawa, N ;

Muranaka, T ;

Zenitani, Y ;

Akimitsu, J .

NATURE, 2001, 410 (6824) :63-64

[8] Thickness dependence of the properties of epitaxial MgB2 thin films grown by hybrid physical-chemical vapor deposition [J].

Pogrebnyakov, AV ;

Redwing, JM ;

Jones, JE ;

Xi, XX ;

Xu, SY ;

Li, Q ;

Vaithyanathan, V ;

Schlom, DG .

APPLIED PHYSICS LETTERS, 2003, 82 (24) :4319-4321

[9]

Rowell J, 2002, NAT MATER, V1, P5, DOI 10.1038/nmat713

[10]

Rowell J. M., 1969, Tunneling phenomena in solids, P385

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