Electron scattering dependence of dendritic magnetic instability in superconducting MgB 2 films

Z. X. Ye; Qiang Li; Y. F. Hu; A. V. Pogrebnyakov; Y. Cui; X. X. Xi; J. M. Redwing; Qi Li

doi:10.1063/1.1827931

Electron scattering dependence of dendritic magnetic instability in superconducting MgB ₂ films

Z. X. Ye, Qiang Li, Y. F. Hu, A. V. Pogrebnyakov, Y. Cui, X. X. Xi, J. M. Redwing, Qi Li

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Abstract

Magnetic instability in both ultrapure and carbon-doped MgB ₂ films is investigated by magneto-optical imaging, transport, and bulk magnetization measurements. In the carbon-doped MgB ₂ thin films, familiar dendritic flux-jump patterns were observed at low temperature as reported in previous experiments. In the ultrapure MgB ₂ thin film, however, a remarkably stable flux penetration was observed, clearly showing the classic behavior of the critical state model. Such different behavior indicates that the electron scattering ultimately controls the magnetic stability of the MgB ₂ films.

Original language	English (US)
Article number	3
Pages (from-to)	5284-5286
Number of pages	3
Journal	Applied Physics Letters
Volume	85
Issue number	22
DOIs	https://doi.org/10.1063/1.1827931
State	Published - Nov 29 2004

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.1827931

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@article{f1790d42513b4db8b44d94910e215ddc,

title = "Electron scattering dependence of dendritic magnetic instability in superconducting MgB 2 films",

abstract = "Magnetic instability in both ultrapure and carbon-doped MgB 2 films is investigated by magneto-optical imaging, transport, and bulk magnetization measurements. In the carbon-doped MgB 2 thin films, familiar dendritic flux-jump patterns were observed at low temperature as reported in previous experiments. In the ultrapure MgB 2 thin film, however, a remarkably stable flux penetration was observed, clearly showing the classic behavior of the critical state model. Such different behavior indicates that the electron scattering ultimately controls the magnetic stability of the MgB 2 films.",

author = "Ye, {Z. X.} and Qiang Li and Hu, {Y. F.} and Pogrebnyakov, {A. V.} and Y. Cui and Xi, {X. X.} and Redwing, {J. M.} and Qi Li",

note = "Funding Information: The authors would like to thank Dr. L. Cooley for critical reading of this manuscript. The work at BNL was supported by the U.S. Department of Energy, Office of Basic Energy Science, under Contract No. DE-AC-02-98CH10886. The work at Penn State is supported in part by ONR under Grant Nos. N00014-00-1-0294 (X.X.X.) and N0014-01-1-0006 (Redwing), by NSF under Grant Nos. DMR-0306746 (X.X.X. and J.M.R.), DMR-0405502 (Q.L.).",

year = "2004",

month = nov,

day = "29",

doi = "10.1063/1.1827931",

language = "English (US)",

volume = "85",

pages = "5284--5286",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

number = "22",

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TY - JOUR

T1 - Electron scattering dependence of dendritic magnetic instability in superconducting MgB 2 films

AU - Ye, Z. X.

AU - Li, Qiang

AU - Hu, Y. F.

AU - Pogrebnyakov, A. V.

AU - Cui, Y.

AU - Xi, X. X.

AU - Redwing, J. M.

AU - Li, Qi

N1 - Funding Information: The authors would like to thank Dr. L. Cooley for critical reading of this manuscript. The work at BNL was supported by the U.S. Department of Energy, Office of Basic Energy Science, under Contract No. DE-AC-02-98CH10886. The work at Penn State is supported in part by ONR under Grant Nos. N00014-00-1-0294 (X.X.X.) and N0014-01-1-0006 (Redwing), by NSF under Grant Nos. DMR-0306746 (X.X.X. and J.M.R.), DMR-0405502 (Q.L.).

PY - 2004/11/29

Y1 - 2004/11/29

N2 - Magnetic instability in both ultrapure and carbon-doped MgB 2 films is investigated by magneto-optical imaging, transport, and bulk magnetization measurements. In the carbon-doped MgB 2 thin films, familiar dendritic flux-jump patterns were observed at low temperature as reported in previous experiments. In the ultrapure MgB 2 thin film, however, a remarkably stable flux penetration was observed, clearly showing the classic behavior of the critical state model. Such different behavior indicates that the electron scattering ultimately controls the magnetic stability of the MgB 2 films.

AB - Magnetic instability in both ultrapure and carbon-doped MgB 2 films is investigated by magneto-optical imaging, transport, and bulk magnetization measurements. In the carbon-doped MgB 2 thin films, familiar dendritic flux-jump patterns were observed at low temperature as reported in previous experiments. In the ultrapure MgB 2 thin film, however, a remarkably stable flux penetration was observed, clearly showing the classic behavior of the critical state model. Such different behavior indicates that the electron scattering ultimately controls the magnetic stability of the MgB 2 films.

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U2 - 10.1063/1.1827931

DO - 10.1063/1.1827931

M3 - Article

AN - SCOPUS:11044234352

SN - 0003-6951

VL - 85

SP - 5284

EP - 5286

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 22

M1 - 3

ER -

Electron scattering dependence of dendritic magnetic instability in superconducting MgB ₂ films

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