DC Magnetization Relaxation and the AC Susceptibility of YBCO Films with Strong Pinning

L. Miu; Paolo Mele; I. Ivan; A. M. Ionescu; D. Miu

doi:10.1007/s10948-014-2652-7

DC Magnetization Relaxation and the AC Susceptibility of YBCO Films with Strong Pinning

L. Miu, Paolo Mele, I. Ivan, A. M. Ionescu, D. Miu

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

7 Citations (Scopus)

Abstract

AC susceptibility and DC magnetization relaxation measurements have been performed for YBa₂Cu₃O₇ films containing BaZrO₃ nanorods preferentially oriented along the c axis, with the external magnetic field perpendicular to the film surface. It was found that the effective vortex activation energy U_e supplied by the standard analysis of the frequency dependent AC magnetic response remains very high even in the vicinity of the irreversibility line indicated by the DC relaxation. We show that the large U_e values appearing in the AC signal are related to the pinning enhanced viscous drag and significant vortex velocities.

Original language	English
Pages (from-to)	361-365
Number of pages	5
Journal	Journal of Superconductivity and Novel Magnetism
Volume	28
Issue number	2
DOIs	https://doi.org/10.1007/s10948-014-2652-7
Publication status	Published - 2014 Jan 1
Externally published	Yes

Keywords

AC measurements
DC magnetization relaxation
Flux creep
Flux flow
YBCO films with BZO nanorods

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1007/s10948-014-2652-7

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title = "DC Magnetization Relaxation and the AC Susceptibility of YBCO Films with Strong Pinning",

abstract = "AC susceptibility and DC magnetization relaxation measurements have been performed for YBa2Cu3O7 films containing BaZrO3 nanorods preferentially oriented along the c axis, with the external magnetic field perpendicular to the film surface. It was found that the effective vortex activation energy Ue supplied by the standard analysis of the frequency dependent AC magnetic response remains very high even in the vicinity of the irreversibility line indicated by the DC relaxation. We show that the large Ue values appearing in the AC signal are related to the pinning enhanced viscous drag and significant vortex velocities.",

keywords = "AC measurements, DC magnetization relaxation, Flux creep, Flux flow, YBCO films with BZO nanorods",

author = "L. Miu and Paolo Mele and I. Ivan and Ionescu, {A. M.} and D. Miu",

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T1 - DC Magnetization Relaxation and the AC Susceptibility of YBCO Films with Strong Pinning

AU - Miu, L.

AU - Mele, Paolo

AU - Ivan, I.

AU - Ionescu, A. M.

AU - Miu, D.

PY - 2014/1/1

Y1 - 2014/1/1

N2 - AC susceptibility and DC magnetization relaxation measurements have been performed for YBa2Cu3O7 films containing BaZrO3 nanorods preferentially oriented along the c axis, with the external magnetic field perpendicular to the film surface. It was found that the effective vortex activation energy Ue supplied by the standard analysis of the frequency dependent AC magnetic response remains very high even in the vicinity of the irreversibility line indicated by the DC relaxation. We show that the large Ue values appearing in the AC signal are related to the pinning enhanced viscous drag and significant vortex velocities.

AB - AC susceptibility and DC magnetization relaxation measurements have been performed for YBa2Cu3O7 films containing BaZrO3 nanorods preferentially oriented along the c axis, with the external magnetic field perpendicular to the film surface. It was found that the effective vortex activation energy Ue supplied by the standard analysis of the frequency dependent AC magnetic response remains very high even in the vicinity of the irreversibility line indicated by the DC relaxation. We show that the large Ue values appearing in the AC signal are related to the pinning enhanced viscous drag and significant vortex velocities.

KW - AC measurements

KW - DC magnetization relaxation

KW - Flux creep

KW - Flux flow

KW - YBCO films with BZO nanorods

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DC Magnetization Relaxation and the AC Susceptibility of YBCO Films with Strong Pinning

Abstract

Keywords

ASJC Scopus subject areas

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