Periodic magnetization instabilities in a superconducting Nb film with a square lattice of Ni dots

A. Terentiev; D. Watkins; L. De Long; L. Cooley

doi:10.1103/PhysRevB.61.R9249

Periodic magnetization instabilities in a superconducting Nb film with a square lattice of Ni dots

A. Terentiev, D. Watkins, L. De Long, L. Cooley

Physics And Astronomy

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

32 Scopus citations

Abstract

Isothermal magnetization curves of a superconducting Nb film perforated by a square lattice of Ni dots exhibit quasiperiodic instabilities below ∼4 K, with a field-dependent period equal to the first, second, or third matching fields. The instabilities are found in a range of applied fields well above the saturation matching value, and under conditions where a continuous Nb film with the same dimensions and magnetization remained stable. The results suggest that terraces of matched flux density exist at the border of a flux-depleted zone created by a geometric barrier near the film edge. Geometric effects may thus play an important role in determining the presence or absence of matching effects.

Original language	English
Pages (from-to)	R9249-R9252
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	61
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.61.R9249
State	Published - 2000

Bibliographical note

Funding Information:
Research at the University of Kentucky was supported by the U.S. Dept. Energy Office of Basic Energy Science, Division of Materials Science, Grant #DE-FG02-97ER45653. Research at Northwestern University was supported by the National Science Foundation under the Materials Research Center Grant #DMR-9309061. Research at the University of Wisconsin was supported by the U.S. Dept. Energy Division of High-Energy Physics, Grant #DE-FG02-96ER40961 and the NSF MRSEC for Nanostructured Materials.

Funding

Research at the University of Kentucky was supported by the U.S. Dept. Energy Office of Basic Energy Science, Division of Materials Science, Grant #DE-FG02-97ER45653. Research at Northwestern University was supported by the National Science Foundation under the Materials Research Center Grant #DMR-9309061. Research at the University of Wisconsin was supported by the U.S. Dept. Energy Division of High-Energy Physics, Grant #DE-FG02-96ER40961 and the NSF MRSEC for Nanostructured Materials.

Funders	Funder number
U.S. Department of Energy Office of Basic Science
Materials Science and Engineering Division	-FG02-97ER45653
NSF MRSEC
National Science Foundation (NSF)	-9309061, -FG02-96ER40961

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.61.R9249

Cite this

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title = "Periodic magnetization instabilities in a superconducting Nb film with a square lattice of Ni dots",

abstract = "Isothermal magnetization curves of a superconducting Nb film perforated by a square lattice of Ni dots exhibit quasiperiodic instabilities below ∼4 K, with a field-dependent period equal to the first, second, or third matching fields. The instabilities are found in a range of applied fields well above the saturation matching value, and under conditions where a continuous Nb film with the same dimensions and magnetization remained stable. The results suggest that terraces of matched flux density exist at the border of a flux-depleted zone created by a geometric barrier near the film edge. Geometric effects may thus play an important role in determining the presence or absence of matching effects.",

author = "A. Terentiev and D. Watkins and \{De Long\}, L. and L. Cooley",

note = "Funding Information: Research at the University of Kentucky was supported by the U.S. Dept. Energy Office of Basic Energy Science, Division of Materials Science, Grant \#DE-FG02-97ER45653. Research at Northwestern University was supported by the National Science Foundation under the Materials Research Center Grant \#DMR-9309061. Research at the University of Wisconsin was supported by the U.S. Dept. Energy Division of High-Energy Physics, Grant \#DE-FG02-96ER40961 and the NSF MRSEC for Nanostructured Materials. ",

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AU - Terentiev, A.

AU - Watkins, D.

AU - De Long, L.

AU - Cooley, L.

N1 - Funding Information: Research at the University of Kentucky was supported by the U.S. Dept. Energy Office of Basic Energy Science, Division of Materials Science, Grant #DE-FG02-97ER45653. Research at Northwestern University was supported by the National Science Foundation under the Materials Research Center Grant #DMR-9309061. Research at the University of Wisconsin was supported by the U.S. Dept. Energy Division of High-Energy Physics, Grant #DE-FG02-96ER40961 and the NSF MRSEC for Nanostructured Materials.

PY - 2000

Y1 - 2000

N2 - Isothermal magnetization curves of a superconducting Nb film perforated by a square lattice of Ni dots exhibit quasiperiodic instabilities below ∼4 K, with a field-dependent period equal to the first, second, or third matching fields. The instabilities are found in a range of applied fields well above the saturation matching value, and under conditions where a continuous Nb film with the same dimensions and magnetization remained stable. The results suggest that terraces of matched flux density exist at the border of a flux-depleted zone created by a geometric barrier near the film edge. Geometric effects may thus play an important role in determining the presence or absence of matching effects.

AB - Isothermal magnetization curves of a superconducting Nb film perforated by a square lattice of Ni dots exhibit quasiperiodic instabilities below ∼4 K, with a field-dependent period equal to the first, second, or third matching fields. The instabilities are found in a range of applied fields well above the saturation matching value, and under conditions where a continuous Nb film with the same dimensions and magnetization remained stable. The results suggest that terraces of matched flux density exist at the border of a flux-depleted zone created by a geometric barrier near the film edge. Geometric effects may thus play an important role in determining the presence or absence of matching effects.

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Periodic magnetization instabilities in a superconducting Nb film with a square lattice of Ni dots

Abstract

Bibliographical note

Funding

ASJC Scopus subject areas

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