AC susceptibility and local intergranular magnetic field in high-Tc superconductors

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AC susceptibility of the granular high-Tc superconductor La1.8Sr0.2CuO4-σ has been measured at 4.5 K as a function of applied DC field HDC a for different AC amplitudes Hm a. Hysteresis related to thermal and magnetic history of the sample was studied and higher screening capabilities in the field-c...

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Autores principales:	Levy, Pablo Eduardo, Ferrari, Hernán Javier, Bekeris, Victoria Isabel, Acha, Carlos Enrique
Publicado:	1993
Materias:	Cooling Copper oxides Crystals Diamagnetism Granular materials Hysteresis Lanthanum compounds Magnetic field effects Magnetic properties Mathematical models Superconductivity Thermodynamic properties AC susceptibility Cooled virgin sample Diamagnetic response Granular superconductors Intergranular magnetic fields Kim's critical state model Lanthanum strontium copper oxides Screening capabilities High temperature superconductors
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09214534_v214_n1-2_p111_Levy http://hdl.handle.net/20.500.12110/paper_09214534_v214_n1-2_p111_Levy
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_09214534_v214_n1-2_p111_Levy
record_format	dspace
spelling	paper:paper_09214534_v214_n1-2_p111_Levy2023-06-08T15:50:41Z AC susceptibility and local intergranular magnetic field in high-Tc superconductors Levy, Pablo Eduardo Ferrari, Hernán Javier Bekeris, Victoria Isabel Acha, Carlos Enrique Cooling Copper oxides Crystals Diamagnetism Granular materials Hysteresis Lanthanum compounds Magnetic field effects Magnetic properties Mathematical models Superconductivity Thermodynamic properties AC susceptibility Cooled virgin sample Diamagnetic response Granular superconductors Intergranular magnetic fields Kim's critical state model Lanthanum strontium copper oxides Screening capabilities High temperature superconductors AC susceptibility of the granular high-Tc superconductor La1.8Sr0.2CuO4-σ has been measured at 4.5 K as a function of applied DC field HDC a for different AC amplitudes Hm a. Hysteresis related to thermal and magnetic history of the sample was studied and higher screening capabilities in the field-cooled virgin samples compared to the zero-field-cooled virgin samples were observed for all AC amplitudes. For both conditions the real and imaginary susceptibility qualitatively shows the DC and AC dependence predicted by Kim's critical state model. AC losses and enhanced diamagnetic response upon reducing HDC a in a field-cooled condition were studied as a function of Hm a. We have used Kim's intergranular critical state model to evaluate AC susceptibility as a function of HDC a for different Hm a. As the applied field differs from the local field in intergranular regions, we performed an appropriate scaling to describe measured values of AC susceptibility. Through this scaling process the local field at the junctions is determined for different magnetic conditions. © 1993. Fil:Levy, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Ferrari, H. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Bekeris, V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Acha, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1993 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09214534_v214_n1-2_p111_Levy http://hdl.handle.net/20.500.12110/paper_09214534_v214_n1-2_p111_Levy
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Cooling Copper oxides Crystals Diamagnetism Granular materials Hysteresis Lanthanum compounds Magnetic field effects Magnetic properties Mathematical models Superconductivity Thermodynamic properties AC susceptibility Cooled virgin sample Diamagnetic response Granular superconductors Intergranular magnetic fields Kim's critical state model Lanthanum strontium copper oxides Screening capabilities High temperature superconductors
spellingShingle	Cooling Copper oxides Crystals Diamagnetism Granular materials Hysteresis Lanthanum compounds Magnetic field effects Magnetic properties Mathematical models Superconductivity Thermodynamic properties AC susceptibility Cooled virgin sample Diamagnetic response Granular superconductors Intergranular magnetic fields Kim's critical state model Lanthanum strontium copper oxides Screening capabilities High temperature superconductors Levy, Pablo Eduardo Ferrari, Hernán Javier Bekeris, Victoria Isabel Acha, Carlos Enrique AC susceptibility and local intergranular magnetic field in high-Tc superconductors
topic_facet	Cooling Copper oxides Crystals Diamagnetism Granular materials Hysteresis Lanthanum compounds Magnetic field effects Magnetic properties Mathematical models Superconductivity Thermodynamic properties AC susceptibility Cooled virgin sample Diamagnetic response Granular superconductors Intergranular magnetic fields Kim's critical state model Lanthanum strontium copper oxides Screening capabilities High temperature superconductors
description	AC susceptibility of the granular high-Tc superconductor La1.8Sr0.2CuO4-σ has been measured at 4.5 K as a function of applied DC field HDC a for different AC amplitudes Hm a. Hysteresis related to thermal and magnetic history of the sample was studied and higher screening capabilities in the field-cooled virgin samples compared to the zero-field-cooled virgin samples were observed for all AC amplitudes. For both conditions the real and imaginary susceptibility qualitatively shows the DC and AC dependence predicted by Kim's critical state model. AC losses and enhanced diamagnetic response upon reducing HDC a in a field-cooled condition were studied as a function of Hm a. We have used Kim's intergranular critical state model to evaluate AC susceptibility as a function of HDC a for different Hm a. As the applied field differs from the local field in intergranular regions, we performed an appropriate scaling to describe measured values of AC susceptibility. Through this scaling process the local field at the junctions is determined for different magnetic conditions. © 1993.
author	Levy, Pablo Eduardo Ferrari, Hernán Javier Bekeris, Victoria Isabel Acha, Carlos Enrique
author_facet	Levy, Pablo Eduardo Ferrari, Hernán Javier Bekeris, Victoria Isabel Acha, Carlos Enrique
author_sort	Levy, Pablo Eduardo
title	AC susceptibility and local intergranular magnetic field in high-Tc superconductors
title_short	AC susceptibility and local intergranular magnetic field in high-Tc superconductors
title_full	AC susceptibility and local intergranular magnetic field in high-Tc superconductors
title_fullStr	AC susceptibility and local intergranular magnetic field in high-Tc superconductors
title_full_unstemmed	AC susceptibility and local intergranular magnetic field in high-Tc superconductors
title_sort	ac susceptibility and local intergranular magnetic field in high-tc superconductors
publishDate	1993
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09214534_v214_n1-2_p111_Levy http://hdl.handle.net/20.500.12110/paper_09214534_v214_n1-2_p111_Levy
work_keys_str_mv	AT levypabloeduardo acsusceptibilityandlocalintergranularmagneticfieldinhightcsuperconductors AT ferrarihernanjavier acsusceptibilityandlocalintergranularmagneticfieldinhightcsuperconductors AT bekerisvictoriaisabel acsusceptibilityandlocalintergranularmagneticfieldinhightcsuperconductors AT achacarlosenrique acsusceptibilityandlocalintergranularmagneticfieldinhightcsuperconductors
_version_	1768544783622471680

AC susceptibility and local intergranular magnetic field in high-Tc superconductors

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