Critical current enhancement in NbN/AlN multilayers

J. M. Murduck; D. W. Capone; Ivan K. Schuller; S. Foner; John B Ketterson

doi:10.1063/1.99399

Critical current enhancement in NbN/AlN multilayers

J. M. Murduck^*, D. W. Capone, Ivan K. Schuller, S. Foner, John B Ketterson

^*Corresponding author for this work

Physics and Astronomy

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

39 Scopus citations

Abstract

Measurements are presented of the critical current density, J_c, and parallel upper critical field, H_c2∥, for the refractory superconductor/insulator multilayer system NbN/AlN. A dramatic increase in J_c, together with an increase of H_c2∥, is observed with decreasing NbN layer thickness. The J_c enhancement arises from flux pinning in the AlN or at the NbN-AlN interface, not at defects in the NbN structure. The results indicate that the development of superconductor/insulator composites is a viable strategy to increase the critical current. Thermal stabilization which does not degrade the very high J_c values was also accomplished in a novel structure by addition of copper layers within the superlattice.

Original language	English (US)
Pages (from-to)	504-506
Number of pages	3
Journal	Applied Physics Letters
Volume	52
Issue number	6
DOIs	https://doi.org/10.1063/1.99399
State	Published - Dec 1 1988

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

Access to Document

10.1063/1.99399

Cite this

@article{f0c6383182854e47bfaeb67bb9ce886d,

title = "Critical current enhancement in NbN/AlN multilayers",

abstract = "Measurements are presented of the critical current density, Jc, and parallel upper critical field, Hc2∥, for the refractory superconductor/insulator multilayer system NbN/AlN. A dramatic increase in Jc, together with an increase of Hc2∥, is observed with decreasing NbN layer thickness. The Jc enhancement arises from flux pinning in the AlN or at the NbN-AlN interface, not at defects in the NbN structure. The results indicate that the development of superconductor/insulator composites is a viable strategy to increase the critical current. Thermal stabilization which does not degrade the very high Jc values was also accomplished in a novel structure by addition of copper layers within the superlattice.",

author = "Murduck, {J. M.} and Capone, {D. W.} and Schuller, {Ivan K.} and S. Foner and Ketterson, {John B}",

year = "1988",

month = dec,

day = "1",

doi = "10.1063/1.99399",

language = "English (US)",

volume = "52",

pages = "504--506",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

number = "6",

}

TY - JOUR

T1 - Critical current enhancement in NbN/AlN multilayers

AU - Murduck, J. M.

AU - Capone, D. W.

AU - Schuller, Ivan K.

AU - Foner, S.

AU - Ketterson, John B

PY - 1988/12/1

Y1 - 1988/12/1

N2 - Measurements are presented of the critical current density, Jc, and parallel upper critical field, Hc2∥, for the refractory superconductor/insulator multilayer system NbN/AlN. A dramatic increase in Jc, together with an increase of Hc2∥, is observed with decreasing NbN layer thickness. The Jc enhancement arises from flux pinning in the AlN or at the NbN-AlN interface, not at defects in the NbN structure. The results indicate that the development of superconductor/insulator composites is a viable strategy to increase the critical current. Thermal stabilization which does not degrade the very high Jc values was also accomplished in a novel structure by addition of copper layers within the superlattice.

AB - Measurements are presented of the critical current density, Jc, and parallel upper critical field, Hc2∥, for the refractory superconductor/insulator multilayer system NbN/AlN. A dramatic increase in Jc, together with an increase of Hc2∥, is observed with decreasing NbN layer thickness. The Jc enhancement arises from flux pinning in the AlN or at the NbN-AlN interface, not at defects in the NbN structure. The results indicate that the development of superconductor/insulator composites is a viable strategy to increase the critical current. Thermal stabilization which does not degrade the very high Jc values was also accomplished in a novel structure by addition of copper layers within the superlattice.

UR - http://www.scopus.com/inward/record.url?scp=0040445440&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0040445440&partnerID=8YFLogxK

U2 - 10.1063/1.99399

DO - 10.1063/1.99399

M3 - Article

AN - SCOPUS:0040445440

VL - 52

SP - 504

EP - 506

JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

IS - 6

ER -

Critical current enhancement in NbN/AlN multilayers

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this