3
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Reversible, Electric-Field Induced Magneto-Ionic Control of Magnetism in Mesoporous Cobalt Ferrite Thin Films

      research-article

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          The magnetic properties of mesoporous cobalt ferrite films can be largely tuned by the application of an electric field using a liquid dielectric electrolyte. By applying a negative voltage, the cobalt ferrite becomes reduced, leading to an increase in saturation magnetization of 15% ( M S ) and reduction in coercivity ( H C ) between 5–28%, depending on the voltage applied (−10 V to −50 V). These changes are mainly non-volatile so after removal of −10 V M S remains 12% higher (and H C 5% smaller) than the pristine sample. All changes can then be reversed with a positive voltage to recover the initial properties even after the application of −50 V. Similar studies were done on analogous films without induced porosity and the effects were much smaller, underscoring the importance of nanoporosity in our system. The different mechanisms possibly responsible for the observed effects are discussed and we conclude that our observations are compatible with voltage-driven oxygen migration ( i.e., the magneto-ionic effect).

          Related collections

          Most cited references48

          • Record: found
          • Abstract: found
          • Article: not found

          Rational material design for ultrafast rechargeable lithium-ion batteries.

          Rechargeable lithium-ion batteries (LIBs) are important electrochemical energy storage devices for consumer electronics and emerging electrical/hybrid vehicles. However, one of the formidable challenges is to develop ultrafast charging LIBs with the rate capability at least one order of magnitude (>10 C) higher than that of the currently commercialized LIBs. This tutorial review presents the state-of-the-art developments in ultrafast charging LIBs by the rational design of materials. First of all, fundamental electrochemistry and related ionic/electronic conduction theories identify that the rate capability of LIBs is kinetically limited by the sluggish solid-state diffusion process in electrode materials. Then, several aspects of the intrinsic materials, materials engineering and processing, and electrode materials architecture design towards maximizing both ionic and electronic conductivity in the electrode with a short diffusion length are deliberated. Finally, the future trends and perspectives for the ultrafast rechargeable LIBs are discussed. Continuous rapid progress in this area is essential and urgent to endow LIBs with ultrafast charging capability to meet huge demands in the near future.
            Bookmark
            • Record: found
            • Abstract: found
            • Article: not found

            Electric-field control of magnetic order above room temperature.

            Controlling magnetism by means of electric fields is a key issue for the future development of low-power spintronics. Progress has been made in the electrical control of magnetic anisotropy, domain structure, spin polarization or critical temperatures. However, the ability to turn on and off robust ferromagnetism at room temperature and above has remained elusive. Here we use ferroelectricity in BaTiO3 crystals to tune the sharp metamagnetic transition temperature of epitaxially grown FeRh films and electrically drive a transition between antiferromagnetic and ferromagnetic order with only a few volts, just above room temperature. The detailed analysis of the data in the light of first-principles calculations indicate that the phenomenon is mediated by both strain and field effects from the BaTiO3. Our results correspond to a magnetoelectric coupling larger than previous reports by at least one order of magnitude and open new perspectives for the use of ferroelectrics in magnetic storage and spintronics.
              Bookmark
              • Record: found
              • Abstract: found
              • Article: not found

              Electric-field control of tri-state phase transformation with a selective dual-ion switch

              Materials can be transformed from one crystalline phase to another by using an electric field to control ion transfer, in a process that can be harnessed in applications such as batteries, smart windows and fuel cells. Increasing the number of transferrable ion species and of accessible crystalline phases could in principle greatly enrich material functionality. However, studies have so far focused mainly on the evolution and control of single ionic species (for example, oxygen, hydrogen or lithium ions). Here we describe the reversible and non-volatile electric-field control of dual-ion (oxygen and hydrogen) phase transformations, with associated electrochromic and magnetoelectric effects. We show that controlling the insertion and extraction of oxygen and hydrogen ions independently of each other can direct reversible phase transformations among three different material phases: the perovskite SrCoO3−δ (ref. 12), the brownmillerite SrCoO2.5 (ref. 13), and a hitherto-unexplored phase, HSrCoO2.5. By analysing the distinct optical absorption properties of these phases, we demonstrate selective manipulation of spectral transparency in the visible-light and infrared regions, revealing a dual-band electrochromic effect that could see application in smart windows. Moreover, the starkly different magnetic and electric properties of the three phases—HSrCoO2.5 is a weakly ferromagnetic insulator, SrCoO3−δ is a ferromagnetic metal, and SrCoO2.5 is an antiferromagnetic insulator—enable an unusual form of magnetoelectric coupling, allowing electric-field control of three different magnetic ground states. These findings open up opportunities for the electric-field control of multistate phase transformations with rich functionalities.
                Bookmark

                Author and article information

                Contributors
                shaunaaryn.robbennolt@uab.cat
                jordi.sort@uab.cat
                Journal
                Sci Rep
                Sci Rep
                Scientific Reports
                Nature Publishing Group UK (London )
                2045-2322
                25 July 2019
                25 July 2019
                2019
                : 9
                : 10804
                Affiliations
                [1 ]GRID grid.7080.f, Departament de Física, , Universitat Autònoma de Barcelona, ; E-08193 Cerdanyola del Vallès, Spain
                [2 ]GRID grid.7080.f, Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, ; E-08193 Cerdanyola del Vallès, Barcelona Spain
                [3 ]ISNI 0000 0004 0369 6218, GRID grid.464100.7, SPINTEC, Univ. Grenoble Alpes/CNRS/INAC-CEA, ; F-38000 Grenoble, France
                [4 ]ISNI 0000 0000 9601 989X, GRID grid.425902.8, Institució Catalana de Recerca i Estudis Avançats (ICREA), Pg. Lluís Companys 23, ; E-08010 Barcelona, Spain
                Author information
                http://orcid.org/0000-0001-5723-7971
                http://orcid.org/0000-0002-9813-735X
                http://orcid.org/0000-0002-8901-0998
                Article
                46618
                10.1038/s41598-019-46618-6
                6658663
                31346196
                7f5f19fb-cdf9-4b8d-9fb6-ec98735a83df
                © The Author(s) 2019

                Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

                History
                : 8 April 2019
                : 25 June 2019
                Funding
                Funded by: FundRef https://doi.org/10.13039/501100003329, Ministerio de Economía y Competitividad (Ministry of Economy and Competitiveness);
                Award ID: RYC-2012-10839
                Award Recipient :
                Funded by: FundRef https://doi.org/10.13039/501100002809, Generalitat de Catalunya (Government of Catalonia);
                Award ID: 2017-SGR-292
                Award Recipient :
                Funded by: FundRef https://doi.org/10.13039/501100002924, Federación Española de Enfermedades Raras (Spanish Federation for Rare Diseases);
                Award ID: MAT2017-86357-C3-1-R
                Award Recipient :
                Funded by: FundRef https://doi.org/10.13039/100010665, EC | EU Framework Programme for Research and Innovation H2020 | H2020 Priority Excellent Science | H2020 Marie Skłodowska-Curie Actions (H2020 Excellent Science - Marie Skłodowska-Curie Actions);
                Award ID: 665919
                Award Recipient :
                Funded by: FundRef https://doi.org/10.13039/100010663, EC | EU Framework Programme for Research and Innovation H2020 | H2020 Priority Excellent Science | H2020 European Research Council (H2020 Excellent Science - European Research Council);
                Award ID: 648454
                Award Recipient :
                Funded by: European Research Council SPIN-PORICS 2014-Consolidator Grant 648454
                Categories
                Article
                Custom metadata
                © The Author(s) 2019

                Uncategorized
                chemical physics,magnetic properties and materials
                Uncategorized
                chemical physics, magnetic properties and materials

                Comments

                Comment on this article