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Magnetoelectricity in CoFe(2)O(4) nanocrystal-P(VDF-HFP) thin films
Transition metal ferrites such as CoFe(2)O(4), possessing a large magnetostriction coefficient and high Curie temperature (T(c) > 600 K), are excellent candidates for creating magnetic order at the nanoscale and provide a pathway to the fabrication of uniform particle-matrix films with optimized...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer
2013
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3766663/ https://www.ncbi.nlm.nih.gov/pubmed/24004499 http://dx.doi.org/10.1186/1556-276X-8-374 |
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author | Liu, Xiaohua Liu, Shuangyi Han, Myung-Geun Zhao, Lukas Deng, Haiming Li, Jackie Zhu, Yimei Krusin-Elbaum, Lia O’Brien, Stephen |
author_facet | Liu, Xiaohua Liu, Shuangyi Han, Myung-Geun Zhao, Lukas Deng, Haiming Li, Jackie Zhu, Yimei Krusin-Elbaum, Lia O’Brien, Stephen |
author_sort | Liu, Xiaohua |
collection | PubMed |
description | Transition metal ferrites such as CoFe(2)O(4), possessing a large magnetostriction coefficient and high Curie temperature (T(c) > 600 K), are excellent candidates for creating magnetic order at the nanoscale and provide a pathway to the fabrication of uniform particle-matrix films with optimized potential for magnetoelectric coupling. Here, a series of 0–3 type nanocomposite thin films composed of ferrimagnetic cobalt ferrite nanocrystals (8 to 18 nm) and a ferroelectric/piezoelectric polymer poly(vinylidene fluoride-co-hexafluoropropene), P(VDF-HFP), were prepared by multiple spin coating and cast coating over a thickness range of 200 nm to 1.6 μm. We describe the synthesis and structural characterization of the nanocrystals and composite films by XRD, TEM, HRTEM, STEM, and SEM, as well as dielectric and magnetic properties, in order to identify evidence of cooperative interactions between the two phases. The CoFe(2)O(4) polymer nanocomposite thin films exhibit composition-dependent effective permittivity, loss tangent, and specific saturation magnetization (M(s)). An enhancement of the effective permittivity and saturation magnetization of the CoFe(2)O(4)-P(VDF-HFP) films was observed and directly compared with CoFe(2)O(4)-polyvinylpyrrolidone, a non-ferroelectric polymer-based nanocomposite prepared by the same method. The comparison provided evidence for the observation of a magnetoelectric effect in the case of CoFe(2)O(4)-P(VDF-HFP), attributed to a magnetostrictive/piezoelectric interaction. An enhancement of M(s) up to +20.7% was observed at room temperature in the case of the 10 wt.% CoFe(2)O(4)-P(VDF-HFP) sample. |
format | Online Article Text |
id | pubmed-3766663 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | Springer |
record_format | MEDLINE/PubMed |
spelling | pubmed-37666632013-09-09 Magnetoelectricity in CoFe(2)O(4) nanocrystal-P(VDF-HFP) thin films Liu, Xiaohua Liu, Shuangyi Han, Myung-Geun Zhao, Lukas Deng, Haiming Li, Jackie Zhu, Yimei Krusin-Elbaum, Lia O’Brien, Stephen Nanoscale Res Lett Nano Express Transition metal ferrites such as CoFe(2)O(4), possessing a large magnetostriction coefficient and high Curie temperature (T(c) > 600 K), are excellent candidates for creating magnetic order at the nanoscale and provide a pathway to the fabrication of uniform particle-matrix films with optimized potential for magnetoelectric coupling. Here, a series of 0–3 type nanocomposite thin films composed of ferrimagnetic cobalt ferrite nanocrystals (8 to 18 nm) and a ferroelectric/piezoelectric polymer poly(vinylidene fluoride-co-hexafluoropropene), P(VDF-HFP), were prepared by multiple spin coating and cast coating over a thickness range of 200 nm to 1.6 μm. We describe the synthesis and structural characterization of the nanocrystals and composite films by XRD, TEM, HRTEM, STEM, and SEM, as well as dielectric and magnetic properties, in order to identify evidence of cooperative interactions between the two phases. The CoFe(2)O(4) polymer nanocomposite thin films exhibit composition-dependent effective permittivity, loss tangent, and specific saturation magnetization (M(s)). An enhancement of the effective permittivity and saturation magnetization of the CoFe(2)O(4)-P(VDF-HFP) films was observed and directly compared with CoFe(2)O(4)-polyvinylpyrrolidone, a non-ferroelectric polymer-based nanocomposite prepared by the same method. The comparison provided evidence for the observation of a magnetoelectric effect in the case of CoFe(2)O(4)-P(VDF-HFP), attributed to a magnetostrictive/piezoelectric interaction. An enhancement of M(s) up to +20.7% was observed at room temperature in the case of the 10 wt.% CoFe(2)O(4)-P(VDF-HFP) sample. Springer 2013-09-03 /pmc/articles/PMC3766663/ /pubmed/24004499 http://dx.doi.org/10.1186/1556-276X-8-374 Text en Copyright ©2013 Liu et al.; licensee Springer. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Nano Express Liu, Xiaohua Liu, Shuangyi Han, Myung-Geun Zhao, Lukas Deng, Haiming Li, Jackie Zhu, Yimei Krusin-Elbaum, Lia O’Brien, Stephen Magnetoelectricity in CoFe(2)O(4) nanocrystal-P(VDF-HFP) thin films |
title | Magnetoelectricity in CoFe(2)O(4) nanocrystal-P(VDF-HFP) thin films |
title_full | Magnetoelectricity in CoFe(2)O(4) nanocrystal-P(VDF-HFP) thin films |
title_fullStr | Magnetoelectricity in CoFe(2)O(4) nanocrystal-P(VDF-HFP) thin films |
title_full_unstemmed | Magnetoelectricity in CoFe(2)O(4) nanocrystal-P(VDF-HFP) thin films |
title_short | Magnetoelectricity in CoFe(2)O(4) nanocrystal-P(VDF-HFP) thin films |
title_sort | magnetoelectricity in cofe(2)o(4) nanocrystal-p(vdf-hfp) thin films |
topic | Nano Express |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3766663/ https://www.ncbi.nlm.nih.gov/pubmed/24004499 http://dx.doi.org/10.1186/1556-276X-8-374 |
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