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

研究成果: Article › 査読

6 被引用数 (Scopus)

抄録

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.

本文言語	English
ページ（範囲）	361-365
ページ数	5
ジャーナル	Journal of Superconductivity and Novel Magnetism
巻	28
号	2
DOI	https://doi.org/10.1007/s10948-014-2652-7
出版ステータス	Published - 2014 1月 1
外部発表	はい

ASJC Scopus subject areas

電子材料、光学材料、および磁性材料
凝縮系物理学

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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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JF - Journal of Superconductivity and Novel Magnetism

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

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