Solution-processed multiferroic thin-films with large magnetoelectric coupling at room-temperature

Hamed Sharifi Dehsari; Morteza Hassanpour Amiri; Kamal Asadi

doi:10.1021/acsnano.2c09769

Solution-processed multiferroic thin-films with large magnetoelectric coupling at room-temperature

Hamed Sharifi Dehsari, Morteza Hassanpour Amiri, Kamal Asadi

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Abstract

Experimental realization of thin films with a significant room-temperature magnetoelectric coupling coefficient, α_ME, in the absence of an external DC magnetic field, has been thus far elusive. Here, a large coupling coefficient of 750 ± 30 mV Oe^-1 cm^-1 is reported for multiferroic polymer nanocomposites (MPCs) thin-films in the absence of an external DC magnetic field. The MPCs are based on PMMA-grafted cobalt-ferrite nanoparticles uniformly dispersed in the piezoelectric polymer poly(vinylidene fluoride-co-trifluoroethylene, P(VDF-TrFE). It is shown that nanoparticle agglomeration plays a detrimental role and significantly reduces α_ME. Surface functionalization of the nanoparticles by grafting a layer of poly(methyl methacrylate) (PMMA) via atom transfer radical polymerization (ATRP) renders the nanoparticle miscible with P(VDF-TRFE) matrix, thus enabling their uniform dispersion in the matrix even in submicrometer thin films. Uniform dispersion yields maximized interfacial interactions between the ferromagnetic nanoparticles and the piezoelectric polymer matrix leading to the experimental demonstration of large α_ME values in solution-processed thin films, which can be exploited in flexible and printable multiferroic electronic devices for sensing and memory applications.

Original language	English
Pages (from-to)	8064–8073
Number of pages	10
Journal	ACS Nano
Volume	17
Issue number	9
Early online date	17 Apr 2023
DOIs	https://doi.org/10.1021/acsnano.2c09769
Publication status	Published - 9 May 2023

Bibliographical note

Funding Information:
H.S.D., M.H.A., and K.A. acknowledge the Alexander von Humboldt Foundation (Germany) for financial support through Sofja Kovalevskaja Award. The Max Planck Institute for Polymer Research (Mainz, Germany) is acknowledged for supporting the work presented.

Funding

The authors acknowledge Professors Krzysztof Matyjaszewski from Carnegie Mellon University, Paul W. M. Blom, and Dago M. de Leeuw from Max Planck Institute for Polymer Research for fruitful discussions. The authors also thank Gunnar Glässer, Verona Maus, Christian Bauer, Michelle Beuchel, and Frank Keller for their technical assistance. H.S.D., M.H.A., and K.A. acknowledge the Alexander von Humboldt Foundation (Germany) for financial support through Sofja Kovalevskaja Award. The Max Planck Institute for Polymer Research (Mainz, Germany) is acknowledged for supporting the work presented. H.S.D., M.H.A., and K.A. acknowledge the Alexander von Humboldt Foundation (Germany) for financial support through Sofja Kovalevskaja Award. The Max Planck Institute for Polymer Research (Mainz, Germany) is acknowledged for supporting the work presented.

Keywords

ferroelectric polymer
magnetic nanoparticle
magnetoelectric coupling
multiferroic
nanocomposites

ASJC Scopus subject areas

General Materials Science
General Engineering
General Physics and Astronomy

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10.1021/acsnano.2c09769Licence: CC BY

sharifi-dehsari-et-al-2023-solution-processed-multiferroic-thin-films-with-large-magnetoelectric-coupling-at-room (1)Final published version, 5.38 MBLicence: CC BY

Cite this

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Solution-processed multiferroic thin-films with large magnetoelectric coupling at room-temperature

Abstract

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Keywords

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