Magnetoresistive Properties of Nanocomposites Based on Ferrite Nanoparticles and Polythiophene
In the presented study, we have synthesized six nanocomposites based on various magnetic nanoparticles and a conducting polymer, poly(3-hexylthiophene-2,5-diyl) (P3HT). Nanoparticles were either coated with squalene and dodecanoic acid or with P3HT. The cores of the nanoparticles were made of one of...
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| Format: | Article |
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MDPI AG
2023-02-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/5/879 |
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| author | Roma Wirecka Krzysztof Maćkosz Antoni Żywczak Mateusz Marek Marzec Szczepan Zapotoczny Andrzej Bernasik |
| author_facet | Roma Wirecka Krzysztof Maćkosz Antoni Żywczak Mateusz Marek Marzec Szczepan Zapotoczny Andrzej Bernasik |
| author_sort | Roma Wirecka |
| collection | DOAJ |
| description | In the presented study, we have synthesized six nanocomposites based on various magnetic nanoparticles and a conducting polymer, poly(3-hexylthiophene-2,5-diyl) (P3HT). Nanoparticles were either coated with squalene and dodecanoic acid or with P3HT. The cores of the nanoparticles were made of one of three different ferrites: nickel ferrite, cobalt ferrite, or magnetite. All synthesized nanoparticles had average diameters below 10 nm, with magnetic saturation at 300 K varying between 20 to 80 emu/g, depending on the used material. Different magnetic fillers allowed for exploring their impact on the conducting properties of the materials, and most importantly, allowed for studying the influence of the shell on the final electromagnetic properties of the nanocomposite. The conduction mechanism was well defined with the help of the variable range hopping model, and a possible mechanism of electrical conduction was proposed. Finally, the observed negative magnetoresistance of up to 5.5% at 180 K, and up to 1.6% at room temperature, was measured and discussed. Thoroughly described results show the role of the interface in the complex materials, as well as clarify room for improvement of the well-known magnetoelectric materials. |
| first_indexed | 2024-03-11T07:15:29Z |
| format | Article |
| id | doaj.art-5d8cf9c420b141fba079d1b778224968 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-11T07:15:29Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-5d8cf9c420b141fba079d1b7782249682023-11-17T08:17:47ZengMDPI AGNanomaterials2079-49912023-02-0113587910.3390/nano13050879Magnetoresistive Properties of Nanocomposites Based on Ferrite Nanoparticles and PolythiopheneRoma Wirecka0Krzysztof Maćkosz1Antoni Żywczak2Mateusz Marek Marzec3Szczepan Zapotoczny4Andrzej Bernasik5Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, al. Adama Mickiewicza 30, 30-059 Krakow, PolandFaculty of Physics and Applied Computer Science, AGH University of Science and Technology, al. Adama Mickiewicza 30, 30-059 Krakow, PolandAcademic Centre for Materials and Nanotechnology, AGH University of Science and Technology, al. Adama Mickiewicza 30, 30-059 Krakow, PolandAcademic Centre for Materials and Nanotechnology, AGH University of Science and Technology, al. Adama Mickiewicza 30, 30-059 Krakow, PolandAcademic Centre for Materials and Nanotechnology, AGH University of Science and Technology, al. Adama Mickiewicza 30, 30-059 Krakow, PolandFaculty of Physics and Applied Computer Science, AGH University of Science and Technology, al. Adama Mickiewicza 30, 30-059 Krakow, PolandIn the presented study, we have synthesized six nanocomposites based on various magnetic nanoparticles and a conducting polymer, poly(3-hexylthiophene-2,5-diyl) (P3HT). Nanoparticles were either coated with squalene and dodecanoic acid or with P3HT. The cores of the nanoparticles were made of one of three different ferrites: nickel ferrite, cobalt ferrite, or magnetite. All synthesized nanoparticles had average diameters below 10 nm, with magnetic saturation at 300 K varying between 20 to 80 emu/g, depending on the used material. Different magnetic fillers allowed for exploring their impact on the conducting properties of the materials, and most importantly, allowed for studying the influence of the shell on the final electromagnetic properties of the nanocomposite. The conduction mechanism was well defined with the help of the variable range hopping model, and a possible mechanism of electrical conduction was proposed. Finally, the observed negative magnetoresistance of up to 5.5% at 180 K, and up to 1.6% at room temperature, was measured and discussed. Thoroughly described results show the role of the interface in the complex materials, as well as clarify room for improvement of the well-known magnetoelectric materials.https://www.mdpi.com/2079-4991/13/5/879magnetic nanoparticlesmagnetoresistancemagnetic nanocomposites |
| spellingShingle | Roma Wirecka Krzysztof Maćkosz Antoni Żywczak Mateusz Marek Marzec Szczepan Zapotoczny Andrzej Bernasik Magnetoresistive Properties of Nanocomposites Based on Ferrite Nanoparticles and Polythiophene Nanomaterials magnetic nanoparticles magnetoresistance magnetic nanocomposites |
| title | Magnetoresistive Properties of Nanocomposites Based on Ferrite Nanoparticles and Polythiophene |
| title_full | Magnetoresistive Properties of Nanocomposites Based on Ferrite Nanoparticles and Polythiophene |
| title_fullStr | Magnetoresistive Properties of Nanocomposites Based on Ferrite Nanoparticles and Polythiophene |
| title_full_unstemmed | Magnetoresistive Properties of Nanocomposites Based on Ferrite Nanoparticles and Polythiophene |
| title_short | Magnetoresistive Properties of Nanocomposites Based on Ferrite Nanoparticles and Polythiophene |
| title_sort | magnetoresistive properties of nanocomposites based on ferrite nanoparticles and polythiophene |
| topic | magnetic nanoparticles magnetoresistance magnetic nanocomposites |
| url | https://www.mdpi.com/2079-4991/13/5/879 |
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