Decrease of bulk pinning strength in deoxygenated YBCO single crystals

We measured the first and third harmonics of the complex ac susceptibility in YBCO single crystals with different oxygen contents (6.5 ≤ × ≤ 7). The amplitude of the ac field was varied in presence of an external dc field both applied parallel to the c-axis of the crystals. We give evidence that deo...

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Autor principal: Bekeris, Victoria Isabel
Publicado: 2000
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03701972_v220_n1_p597_Moreno
http://hdl.handle.net/20.500.12110/paper_03701972_v220_n1_p597_Moreno
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_03701972_v220_n1_p597_Moreno
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spelling paper:paper_03701972_v220_n1_p597_Moreno2023-06-08T15:36:23Z Decrease of bulk pinning strength in deoxygenated YBCO single crystals Bekeris, Victoria Isabel We measured the first and third harmonics of the complex ac susceptibility in YBCO single crystals with different oxygen contents (6.5 ≤ × ≤ 7). The amplitude of the ac field was varied in presence of an external dc field both applied parallel to the c-axis of the crystals. We give evidence that deoxygenation leads to a reduction of the bulk pinning strength and consequently to a stronger contribution of geometrical barriers. These results support the recently reported investigations showing that deoxygenation makes the YBCO crystals more anisotropic reducing the effective bulk pinning for quasi-two-dimensional vortices. We also show measurements for the same crystals with the ac field applied perpendicular to the c-axis. Fil:Bekeris, V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2000 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03701972_v220_n1_p597_Moreno http://hdl.handle.net/20.500.12110/paper_03701972_v220_n1_p597_Moreno
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description We measured the first and third harmonics of the complex ac susceptibility in YBCO single crystals with different oxygen contents (6.5 ≤ × ≤ 7). The amplitude of the ac field was varied in presence of an external dc field both applied parallel to the c-axis of the crystals. We give evidence that deoxygenation leads to a reduction of the bulk pinning strength and consequently to a stronger contribution of geometrical barriers. These results support the recently reported investigations showing that deoxygenation makes the YBCO crystals more anisotropic reducing the effective bulk pinning for quasi-two-dimensional vortices. We also show measurements for the same crystals with the ac field applied perpendicular to the c-axis.
author Bekeris, Victoria Isabel
spellingShingle Bekeris, Victoria Isabel
Decrease of bulk pinning strength in deoxygenated YBCO single crystals
author_facet Bekeris, Victoria Isabel
author_sort Bekeris, Victoria Isabel
title Decrease of bulk pinning strength in deoxygenated YBCO single crystals
title_short Decrease of bulk pinning strength in deoxygenated YBCO single crystals
title_full Decrease of bulk pinning strength in deoxygenated YBCO single crystals
title_fullStr Decrease of bulk pinning strength in deoxygenated YBCO single crystals
title_full_unstemmed Decrease of bulk pinning strength in deoxygenated YBCO single crystals
title_sort decrease of bulk pinning strength in deoxygenated ybco single crystals
publishDate 2000
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03701972_v220_n1_p597_Moreno
http://hdl.handle.net/20.500.12110/paper_03701972_v220_n1_p597_Moreno
work_keys_str_mv AT bekerisvictoriaisabel decreaseofbulkpinningstrengthindeoxygenatedybcosinglecrystals
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