Nano-bridges based on the superconducting MgB2 thin films

被引：4

作者：

Gregor, M. ^{[1
,2
]}

Micunek, R. ^{[1
]}

Plecenik, T. ^{[1
]}

Roch, T. ^{[1
]}

Lugstein, A. ^{[3
]}

Bertagnolli, E. ^{[3
]}

Vavra, I. ^{[4
]}

Stefecka, M. ^{[2
]}

Kubinec, M. ^{[1
]}

Leporis, M. ^{[2
]}

Gasparik, V. ^{[1
,2
]}

Kus, P. ^{[1
]}

Plecenik, A. ^{[1
]}

机构：

[1] FMPI CU, Dept Expt Phys, Bratislava 84248, Slovakia

[2] Biont AS, Bratislava 84229, Slovakia

[3] TU Wien, Inst Solid State Elect, A-1040 Vienna, Austria

[4] Slovak Acad Sci, Inst Elect Engn, SK-84239 Bratislava, Slovakia

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2008年 / 468卷 / 7-10期

关键词：

MgB2; superconductivity; nano-bridge; FIB;

D O I：

10.1016/j.physc.2007.11.047

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Precursor MgB thin films were prepared on sapphire substrates by magnetron sputtering. Influence of the ex situ annealing process on the roughness of the superconducting MgB2 thin films is discussed. Optimized annealing process of MgB precursor thin films in vacuum results in smooth superconducting MgB2 thin films with roughness below 10 nm, critical temperature T-con = 31K and transition width Delta T-c less than 1 K. Nano-bridges based on the superconducting MgB2 thin films using optical and focused ion beam lithography were prepared. Critical current density j(c) (4.2 K) measured on 50 nm wide strip was 7.3 x 10(6) A/cm(2) and no significant loss of superconducting properties was detected. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：785 / 788

页数：4

共 11 条

[1] The road to magnesium diboride thin films, Josephson junctions and SQUIDs [J].

Brinkman, A ;

Mijatovic, D ;

Hilgenkamp, H ;

Rijnders, G ;

Oomen, I ;

Veldhuis, D ;

Roesthuis, F ;

Rogalla, H ;

Blank, DHA .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2003, 16 (02) :246-253

[2] Superconducting thin films of MgB2 on Si by pulsed laser deposition [J].

Brinkman, A ;

Mijatovic, D ;

Rijnders, G ;

Leca, V ;

Smilde, HJH ;

Oomen, I ;

Golubov, AA ;

Roesthuis, F ;

Harkema, S ;

Hilgenkamp, H ;

Blank, DHA ;

Rogalla, H .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2001, 353 (1-2) :1-4

[3] Planar superconductor-normal-superconductor Josephson junctions in MgB2 [J].

Burnell, G ;

Kang, DJ ;

Lee, HN ;

Moon, SH ;

Oh, B ;

Blamire, MG .

APPLIED PHYSICS LETTERS, 2001, 79 (21) :3464-3466

[4] Superconducting properties of MgB2 thin films prepared by sequential deposition of boron and magnesium [J].

Chromik, S ;

Benacka, S ;

Gazi, S ;

Strbík, V ;

Oszi, Z ;

Kostic, I .

VACUUM, 2002, 69 (1-3) :351-354

[5] Josephson effect in MgB2 break junctions -: art. no. 097001 [J].

Gonnelli, RS ;

Calzolari, A ;

Daghero, D ;

Ummarino, GA ;

Stepanov, VA ;

Giunchi, G ;

Ceresara, S ;

Ripamonti, G .

PHYSICAL REVIEW LETTERS, 2001, 87 (09) :970011-970014

[6] Synthesis of as-grown superconducting MgB2 thin films by molecular beam epitaxy in UHV conditions [J].

Harada, Y ;

Uduka, M ;

Nakanishi, Y ;

Yoshimoto, N ;

Yoshizawa, M .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2004, 412 :1383-1386

[7]

LIKHAREV KK, 1979, REV MOD PHYS, V51

[8] Preparation of MgB2 superconducting thin films by magnetron sputtering [J].

Micunek, R ;

Plecenik, A ;

Kús, P ;

Zahoran, M ;

Tomásek, M ;

Plecenik, T ;

Gregor, M ;

Stefecka, M ;

Jacko, V ;

Gregus, J ;

Granicic, B ;

Kubinec, M ;

Mahel, M .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2006, 435 (1-2) :78-81

[9] Superconducting properties of two-step in situ annealed MgB2 thin films [J].

Mori, Z ;

Doi, T ;

Ishizaki, Y ;

Kitaguchi, H ;

Okada, M ;

Saitoh, K ;

Hakuraku, Y .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2004, 412 :1371-1375

[10] Characteristics of MgB2/AlN/NbN Josephson junctions with optimized conditions [J].

Shimakage, H ;

Tsujimoto, K ;

Wang, Z ;

Tonouchi, M .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2004, 17 (12) :1376-1380

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