Web of Science: 4 citations, Scopus: 3 citations, Google Scholar: citations
Large magnetoelectric effects in electrodeposited nanoporous microdisks driven by effective surface charging and magneto-ionics
Navarro Senent, Cristina (Universitat Autònoma de Barcelona. Departament de Física)
Fornell Beringues, Jordina (Universitat Autònoma de Barcelona. Departament de Física)
Isarain-Chávez, E. (Universitat Autònoma de Barcelona. Departament de Física)
Quintana Romero, Alberto (Universitat Autònoma de Barcelona. Departament de Física)
Menéndez Dalmau, Enric (Universitat Autònoma de Barcelona. Departament de Física)
Foerster, Michael (ALBA Laboratori de Llum de Sincrotró)
Aballe, Lucía (ALBA Laboratori de Llum de Sincrotró)
Weschke, Eugen (Helmholtz-Zentrum Berlin für Materialien und Energie)
Nogués i Sanmiquel, Josep (Institut Català de Nanociència i Nanotecnologia)
Pellicer Vilà, Eva M. (Eva Maria) (Universitat Autònoma de Barcelona. Departament de Física)
Sort Viñas, Jordi (Universitat Autònoma de Barcelona. Departament de Física)

Date: 2018
Abstract: A synergetic approach to enhance magnetoelectric effects (i. e. , control of magnetism with voltage) and improve energy efficiency in magnetically actuated devices is presented. The investigated material consists of an ordered array of Co–Pt microdisks, in which nanoporosity and partial oxidation are introduced during the synthetic procedure to synergetically boost the effects of electric field. The microdisks are grown by electrodeposition from an electrolyte containing an amphiphilic polymeric surfactant. The bath formulation is designed to favor the incorporation of oxygen in the form of cobalt oxide. A pronounced reduction of coercivity (88%) and a remarkable increase of Kerr signal amplitude (60%) are observed at room temperature upon subjecting the microdisks to negative voltages through an electrical double layer. These large voltage-induced changes in the magnetic properties of the microdisks are due to (i) the high surface-area-to-volume ratio with ultranarrow pore walls (sub-10 nm) that promote enhanced electric charge accumulation and (ii) magneto-ionic effects, where voltage-driven O2– migration promotes a partial reduction of CoO to Co at room temperature. This simple and versatile procedure to fabricate patterned "nano-in-micro" magnetic motifs with adjustable voltage-driven magnetic properties is very appealing for energy-efficient magnetic recording systems and other magnetoelectronic devices.
Note: Número d'acord de subvenció EC/H2020/665919
Note: Número d'acord de subvenció EC/H2020/648454
Note: Número d'acord de subvenció MINECO/MAT2017-86357-C3-1-R
Note: Número d'acord de subvenció MINECO/MAT2014-57960-C3-1-R
Note: Número d'acord de subvenció MINECO/IJCI-2015-27030
Note: Número d'acord de subvenció MINECO/SEV-2013-0295
Note: Número d'acord de subvenció MINECO/RYC-2012-10839
Note: Número d'acord de subvenció AGAUR/2017/SGR-292
Rights: Tots els drets reservats
Language: Anglès.
Document: article ; recerca ; publishedVersion
Subject: Nanoporous material ; Magnetoelectric actuation ; Co−Pt alloy ; Patterned microstructures ; Magneto-ionic effects
Published in: ACS applied materials & interfaces, Vol. 10, issue 51 (Dec. 2018) , p. 44897-44905, ISSN 1944-8244

DOI: 10.1021/acsami.8b17442


Available from: 2019-12-30

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (scientific output) > Experimental sciences > Group of Smart Nanoengineered Materials, Nanomechanics and Nanomagnetism (Gnm3) > SPIN-PORICS
Research literature > UAB research groups literature > Research Centres and Groups (scientific output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles

 Record created 2019-10-01, last modified 2019-11-07



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