Superconducting properties of nanocrystalline MgB2 thin films made by an in situ annealing process

X. H. Zeng; A. Sukiasyan; X. X. Xi; Y. F. Hu; E. Wertz; Qi Li; W. Tian; H. P. Sun; X. Q. Pan; J. Lettieri; D. G. Schlom; C. O. Brubaker; Zi Kui Liu; Qiang Li

doi:10.1063/1.1405431

Superconducting properties of nanocrystalline MgB₂ thin films made by an in situ annealing process

X. H. Zeng
, A. Sukiasyan
, X. X. Xi
, Y. F. Hu
, E. Wertz
, Qi Li
, W. Tian
, H. P. Sun
, X. Q. Pan
, J. Lettieri
, D. G. Schlom
, C. O. Brubaker
, Zi Kui Liu
, Qiang Li

Stony Brook University

Pennsylvania State University
University of Michigan, Ann Arbor

Research output: Contribution to journal › Article › peer-review

84 Scopus citations

Abstract

We have studied the structural and superconducting properties of MgB₂ thin films made by pulsed-laser deposition followed by in situ annealing. The cross-sectional transmission electron microscopy reveals a nanocrystalline mixture of textured MgO and MgB₂ with very small grain sizes. A zero-resistance transition temperature (T_c0) of 34 K and a zero-field critical current density (J_c) of 1.3 × 10⁶ A/cm² were obtained. The irreversibility field was ∼8 T at low temperatures, although severe pinning instability was observed. The result is a step towards making the in situ deposition process a viable technique for MgB₂ Josephson junction technologies.

Original language	English
Pages (from-to)	1840-1842
Number of pages	3
Journal	Applied Physics Letters
Volume	79
Issue number	12
DOIs	https://doi.org/10.1063/1.1405431
State	Published - Sep 17 2001

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title = "Superconducting properties of nanocrystalline MgB2 thin films made by an in situ annealing process",

abstract = "We have studied the structural and superconducting properties of MgB2 thin films made by pulsed-laser deposition followed by in situ annealing. The cross-sectional transmission electron microscopy reveals a nanocrystalline mixture of textured MgO and MgB2 with very small grain sizes. A zero-resistance transition temperature (Tc0) of 34 K and a zero-field critical current density (Jc) of 1.3 × 106 A/cm2 were obtained. The irreversibility field was ∼8 T at low temperatures, although severe pinning instability was observed. The result is a step towards making the in situ deposition process a viable technique for MgB2 Josephson junction technologies.",

author = "Zeng, \{X. H.\} and A. Sukiasyan and Xi, \{X. X.\} and Hu, \{Y. F.\} and E. Wertz and Qi Li and W. Tian and Sun, \{H. P.\} and Pan, \{X. Q.\} and J. Lettieri and Schlom, \{D. G.\} and Brubaker, \{C. O.\} and Liu, \{Zi Kui\} and Qiang Li",

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doi = "10.1063/1.1405431",

language = "English",

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TY - JOUR

T1 - Superconducting properties of nanocrystalline MgB2 thin films made by an in situ annealing process

AU - Zeng, X. H.

AU - Sukiasyan, A.

AU - Xi, X. X.

AU - Hu, Y. F.

AU - Wertz, E.

AU - Li, Qi

AU - Tian, W.

AU - Sun, H. P.

AU - Pan, X. Q.

AU - Lettieri, J.

AU - Schlom, D. G.

AU - Brubaker, C. O.

AU - Liu, Zi Kui

AU - Li, Qiang

PY - 2001/9/17

Y1 - 2001/9/17

N2 - We have studied the structural and superconducting properties of MgB2 thin films made by pulsed-laser deposition followed by in situ annealing. The cross-sectional transmission electron microscopy reveals a nanocrystalline mixture of textured MgO and MgB2 with very small grain sizes. A zero-resistance transition temperature (Tc0) of 34 K and a zero-field critical current density (Jc) of 1.3 × 106 A/cm2 were obtained. The irreversibility field was ∼8 T at low temperatures, although severe pinning instability was observed. The result is a step towards making the in situ deposition process a viable technique for MgB2 Josephson junction technologies.

AB - We have studied the structural and superconducting properties of MgB2 thin films made by pulsed-laser deposition followed by in situ annealing. The cross-sectional transmission electron microscopy reveals a nanocrystalline mixture of textured MgO and MgB2 with very small grain sizes. A zero-resistance transition temperature (Tc0) of 34 K and a zero-field critical current density (Jc) of 1.3 × 106 A/cm2 were obtained. The irreversibility field was ∼8 T at low temperatures, although severe pinning instability was observed. The result is a step towards making the in situ deposition process a viable technique for MgB2 Josephson junction technologies.

UR - https://www.scopus.com/pages/publications/0035903420

U2 - 10.1063/1.1405431

DO - 10.1063/1.1405431

M3 - Article

SN - 0003-6951

VL - 79

SP - 1840

EP - 1842

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 12

ER -

Superconducting properties of nanocrystalline MgB₂ thin films made by an in situ annealing process

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