Critical Current and Pinning Features of a CaKFe<sub>4</sub>As<sub>4</sub> Polycrystalline Sample

We analyze the magnetic behavior of a CaKFe4As4 polycrystalline sample fabricated by a mechanochemically assisted synthesis route. By means of DC magnetization (M) measurements as a function of the temperature (T) and DC magnetic field (H) we study its critical parameters and pinning features. The c...

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Autores principales:	Armando Galluzzi, Antonio Leo, Andrea Masi, Francesca Varsano, Angela Nigro, Gaia Grimaldi, Massimiliano Polichetti
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	iron-based superconductors 1144 IBS family DC magnetic properties pinning properties pinning force analysis magnetism and superconductivity Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/ebc4775e3d9f4f9da876035d12a596c1
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spelling	oai:doaj.org-article:ebc4775e3d9f4f9da876035d12a596c12021-11-11T18:08:50ZCritical Current and Pinning Features of a CaKFe<sub>4</sub>As<sub>4</sub> Polycrystalline Sample10.3390/ma142166111996-1944https://doaj.org/article/ebc4775e3d9f4f9da876035d12a596c12021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6611https://doaj.org/toc/1996-1944We analyze the magnetic behavior of a CaKFe4As4 polycrystalline sample fabricated by a mechanochemically assisted synthesis route. By means of DC magnetization (M) measurements as a function of the temperature (T) and DC magnetic field (H) we study its critical parameters and pinning features. The critical temperature T<sub>c</sub> has been evaluated by M(T) curves performed in Zero Field Cooling-Field Cooling conditions. These curves show the presence of a little magnetic background for temperatures above T<sub>c</sub>, as also confirmed by the hysteresis loops M(H). Starting from the M(H) curves, the critical current density J<sub>c</sub> of the sample has been calculated as a function of the field at different temperatures in the framework of the Bean critical state model. The J<sub>c</sub>(H) values are in line with the ones reported in the literature for this typology of samples. By analyzing the temperature dependence of the critical current density J<sub>c</sub>(T) at different magnetic fields, it has been found that the sample is characterized by a strong type pinning regime. This sample peculiarity can open perspectives for future improvement in the fabrication of this material.Armando GalluzziAntonio LeoAndrea MasiFrancesca VarsanoAngela NigroGaia GrimaldiMassimiliano PolichettiMDPI AGarticleiron-based superconductors1144 IBS familyDC magnetic propertiespinning propertiespinning force analysismagnetism and superconductivityTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6611, p 6611 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	iron-based superconductors 1144 IBS family DC magnetic properties pinning properties pinning force analysis magnetism and superconductivity Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	iron-based superconductors 1144 IBS family DC magnetic properties pinning properties pinning force analysis magnetism and superconductivity Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Armando Galluzzi Antonio Leo Andrea Masi Francesca Varsano Angela Nigro Gaia Grimaldi Massimiliano Polichetti Critical Current and Pinning Features of a CaKFe<sub>4</sub>As<sub>4</sub> Polycrystalline Sample
description	We analyze the magnetic behavior of a CaKFe4As4 polycrystalline sample fabricated by a mechanochemically assisted synthesis route. By means of DC magnetization (M) measurements as a function of the temperature (T) and DC magnetic field (H) we study its critical parameters and pinning features. The critical temperature T<sub>c</sub> has been evaluated by M(T) curves performed in Zero Field Cooling-Field Cooling conditions. These curves show the presence of a little magnetic background for temperatures above T<sub>c</sub>, as also confirmed by the hysteresis loops M(H). Starting from the M(H) curves, the critical current density J<sub>c</sub> of the sample has been calculated as a function of the field at different temperatures in the framework of the Bean critical state model. The J<sub>c</sub>(H) values are in line with the ones reported in the literature for this typology of samples. By analyzing the temperature dependence of the critical current density J<sub>c</sub>(T) at different magnetic fields, it has been found that the sample is characterized by a strong type pinning regime. This sample peculiarity can open perspectives for future improvement in the fabrication of this material.
format	article
author	Armando Galluzzi Antonio Leo Andrea Masi Francesca Varsano Angela Nigro Gaia Grimaldi Massimiliano Polichetti
author_facet	Armando Galluzzi Antonio Leo Andrea Masi Francesca Varsano Angela Nigro Gaia Grimaldi Massimiliano Polichetti
author_sort	Armando Galluzzi
title	Critical Current and Pinning Features of a CaKFe<sub>4</sub>As<sub>4</sub> Polycrystalline Sample
title_short	Critical Current and Pinning Features of a CaKFe<sub>4</sub>As<sub>4</sub> Polycrystalline Sample
title_full	Critical Current and Pinning Features of a CaKFe<sub>4</sub>As<sub>4</sub> Polycrystalline Sample
title_fullStr	Critical Current and Pinning Features of a CaKFe<sub>4</sub>As<sub>4</sub> Polycrystalline Sample
title_full_unstemmed	Critical Current and Pinning Features of a CaKFe<sub>4</sub>As<sub>4</sub> Polycrystalline Sample
title_sort	critical current and pinning features of a cakfe<sub>4</sub>as<sub>4</sub> polycrystalline sample
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/ebc4775e3d9f4f9da876035d12a596c1
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Critical Current and Pinning Features of a CaKFe<sub>4</sub>As<sub>4</sub> Polycrystalline Sample

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