Dependence of Magnetic Properties of As-Prepared Nanocrystalline Ni2MnGa Glass-Coated Microwires on the Geometrical Aspect Ratio
dc.contributor.author | Salaheldeen Mohamed Hassan, Mohamed | |
dc.contributor.author | Zhukova Zhukova, Valentina ![]() | |
dc.contributor.author | López Antón, Ricardo | |
dc.contributor.author | Zhukov Egorova, Arkady Pavlovich ![]() | |
dc.date.accessioned | 2024-06-14T15:00:59Z | |
dc.date.available | 2024-06-14T15:00:59Z | |
dc.date.issued | 2024-06-06 | |
dc.identifier.citation | Sensors 24(11) : (2024) // Article ID 3692 | es_ES |
dc.identifier.issn | 1424-8220 | |
dc.identifier.uri | http://hdl.handle.net/10810/68431 | |
dc.description.abstract | We have prepared NiMnGa glass-coated microwires with different geometrical aspect ratios, ρ = dmetal/Dtotal (dmetal—diameter of metallic nucleus, and Dtotal—total diameter). The structure and magnetic properties are investigated in a wide range of temperatures and magnetic fields. The XRD analysis illustrates stable microstructure in the range of ρ from 0.25 to 0.60. The estimations of average grain size and crystalline phase content evidence a remarkable variation as the ρ-ratio sweeps from 0.25 to 0.60. Thus, the microwires with the lowest aspect ratio, i.e., ρ = 0.25, show the smallest average grain size and the highest crystalline phase content. This change in the microstructural properties correlates with dramatic changes in the magnetic properties. Hence, the sample with the lowest ρ-ratio exhibits an extremely high value of the coercivity, Hc, compared to the value for the sample with the largest ρ-ratio (2989 Oe and 10 Oe, respectively, i.e., almost 300 times higher). In addition, a similar trend is observed for the spontaneous exchange bias phenomena, with an exchange bias field, Hex, of 120 Oe for the sample with ρ = 0.25 compared to a Hex = 12.5 Oe for the sample with ρ = 0.60. However, the thermomagnetic curves (field-cooled—FC and field-heating—FH) show similar magnetic behavior for all the samples. Meanwhile, FC and FH curves measured at low magnetic fields show negative values for ρ = 0.25, whereas positive values are found for the other samples. The obtained results illustrate the substantial effect of the internal stresses on microstructure and magnetic properties, which leads to magnetic hardening of samples with low aspect ratio. | es_ES |
dc.description.sponsorship | This research was funded by the Spanish MICIN, under PID2022-141373NB-I00 project, by EU (Horizon Europe) under “INFINITE” and “HARMONY” (HORIZON-CL4-2023-RESILIENCE-01) projects, by the Government of the Basque Country, under Elkartek (MOSINCO and ATLANTIS) projects and by under the scheme of “Ayuda a Grupos Consolidados” (Ref.: IT1670-22), and by the Plan Propio de la Universidad de Castilla-La Mancha (FEDER, EU) 2022-GRIN-34313. In addition, MS wish to acknowledge the funding within the Maria Zambrano contract by the Spanish Ministerio de Universidades and European Union—Next Generation EU (“Financiado por la Unión Europea-Next Generation EU”). We also wish to thank the administration of the University of the Basque Country, which not only provides very limited funding, but even expropriates the resources received by the research group from private companies for the research activities of the group. Such interference helps keep us on our toes. | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | MDPI | es_ES |
dc.relation | info:eu-repo/grantAgreement/MICIN/PID2022-141373NB-I00 | es_ES |
dc.rights | info:eu-repo/semantics/openAccess | es_ES |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | |
dc.subject | NiMnGa alloys | es_ES |
dc.subject | glass-coated microwires | es_ES |
dc.subject | magnetic field | es_ES |
dc.subject | Taylor–Ulitovsky technique | es_ES |
dc.subject | coercivity | es_ES |
dc.subject | microstructural properties | es_ES |
dc.title | Dependence of Magnetic Properties of As-Prepared Nanocrystalline Ni2MnGa Glass-Coated Microwires on the Geometrical Aspect Ratio | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.date.updated | 2024-06-13T14:54:22Z | |
dc.rights.holder | © 2024 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/) | es_ES |
dc.relation.publisherversion | https://www.mdpi.com/1424-8220/24/11/3692 | es_ES |
dc.identifier.doi | 10.3390/s24113692 | |
dc.departamentoes | Polímeros y Materiales Avanzados: Física, Química y Tecnología | |
dc.departamentoeu | Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia |
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Except where otherwise noted, this item's license is described as © 2024 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/)