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Voltage-controlled ON-OFF ferromagnetism at room temperature in a single metal oxide film

(2018) ACS NANO. 12(10). p.10291-10300
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Abstract
Electric-field-controlled magnetism can boost energy efficiency in widespread applications. However, technologically, this effect is facing important challenges: mechanical failure in strain-mediated piezoelectric/magnetostrictive devices, dearth of room-temperature multiferroics, or stringent thickness limitations in electrically charged metallic films. Voltage-driven ionic motion (magneto-ionics) circumvents most of these drawbacks while exhibiting interesting magnetoelectric phenomena. Nevertheless, magneto-ionics typically requires heat treatments and multicomponent heterostructures. Here we report on the electrolytegated and defect-mediated O and Co transport in a Co3O4 single layer which allows for room-temperature voltage-controlled ON-OFF ferromagnetism (magnetic switch) via internal reduction/oxidation processes. Negative voltages partially reduce Co3O4 to Co (ferromagnetism: ON), resulting in graded films including Co- and O-rich areas. Positive bias oxidizes Co back to Co3O4 (paramagnetism: OFF). This electric-field-induced atomic-scale reconfiguration process is compositionally, structurally, and magnetically reversible and self-sustained, since no oxygen source other than the Co3O4 itself is required. This process could lead to electric-field-controlled device concepts for spintronics.
Keywords
ELECTRIC-FIELD CONTROL, OXYGEN MIGRATION, MAGNETISM, HETEROSTRUCTURES, TRANSITION, FERRITE, SPINEL, CO3O4, FACET, voltage control of magnetism, electrolyte, ion migration, magneto-ionics, on-off ferromagnetism

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MLA
Quintana, Alberto, et al. “Voltage-Controlled ON-OFF Ferromagnetism at Room Temperature in a Single Metal Oxide Film.” ACS NANO, vol. 12, no. 10, 2018, pp. 10291–300, doi:10.1021/acsnano.8b05407.
APA
Quintana, A., Menendez, E., Liedke, M. O., Butterling, M., Wagner, A., Sireus, V., … Sort, J. (2018). Voltage-controlled ON-OFF ferromagnetism at room temperature in a single metal oxide film. ACS NANO, 12(10), 10291–10300. https://doi.org/10.1021/acsnano.8b05407
Chicago author-date
Quintana, Alberto, Enric Menendez, Maciej O Liedke, Maik Butterling, Andreas Wagner, Veronica Sireus, Pau Torruella, et al. 2018. “Voltage-Controlled ON-OFF Ferromagnetism at Room Temperature in a Single Metal Oxide Film.” ACS NANO 12 (10): 10291–300. https://doi.org/10.1021/acsnano.8b05407.
Chicago author-date (all authors)
Quintana, Alberto, Enric Menendez, Maciej O Liedke, Maik Butterling, Andreas Wagner, Veronica Sireus, Pau Torruella, Sonia Estrade, Francesca Peiro, Jolien Dendooven, Christophe Detavernier, Peyton D Murray, Dustin Allen Gilbert, Kai Liu, Eva Pellicer, Josep Nogues, and Jordi Sort. 2018. “Voltage-Controlled ON-OFF Ferromagnetism at Room Temperature in a Single Metal Oxide Film.” ACS NANO 12 (10): 10291–10300. doi:10.1021/acsnano.8b05407.
Vancouver
1.
Quintana A, Menendez E, Liedke MO, Butterling M, Wagner A, Sireus V, et al. Voltage-controlled ON-OFF ferromagnetism at room temperature in a single metal oxide film. ACS NANO. 2018;12(10):10291–300.
IEEE
[1]
A. Quintana et al., “Voltage-controlled ON-OFF ferromagnetism at room temperature in a single metal oxide film,” ACS NANO, vol. 12, no. 10, pp. 10291–10300, 2018.
@article{8609296,
  abstract     = {{Electric-field-controlled magnetism can boost energy efficiency in widespread applications. However, technologically, this effect is facing important challenges: mechanical failure in strain-mediated piezoelectric/magnetostrictive devices, dearth of room-temperature multiferroics, or stringent thickness limitations in electrically charged metallic films. Voltage-driven ionic motion (magneto-ionics) circumvents most of these drawbacks while exhibiting interesting magnetoelectric phenomena. Nevertheless, magneto-ionics typically requires heat treatments and multicomponent heterostructures. Here we report on the electrolytegated and defect-mediated O and Co transport in a Co3O4 single layer which allows for room-temperature voltage-controlled ON-OFF ferromagnetism (magnetic switch) via internal reduction/oxidation processes. Negative voltages partially reduce Co3O4 to Co (ferromagnetism: ON), resulting in graded films including Co- and O-rich areas. Positive bias oxidizes Co back to Co3O4 (paramagnetism: OFF). This electric-field-induced atomic-scale reconfiguration process is compositionally, structurally, and magnetically reversible and self-sustained, since no oxygen source other than the Co3O4 itself is required. This process could lead to electric-field-controlled device concepts for spintronics.}},
  author       = {{Quintana, Alberto and Menendez, Enric and Liedke, Maciej O and Butterling, Maik and Wagner, Andreas and Sireus, Veronica and Torruella, Pau and Estrade, Sonia and Peiro, Francesca and Dendooven, Jolien and Detavernier, Christophe and Murray, Peyton D and Gilbert, Dustin Allen and Liu, Kai and Pellicer, Eva and Nogues, Josep and Sort, Jordi}},
  issn         = {{1936-0851}},
  journal      = {{ACS NANO}},
  keywords     = {{ELECTRIC-FIELD CONTROL,OXYGEN MIGRATION,MAGNETISM,HETEROSTRUCTURES,TRANSITION,FERRITE,SPINEL,CO3O4,FACET,voltage control of magnetism,electrolyte,ion migration,magneto-ionics,on-off ferromagnetism}},
  language     = {{eng}},
  number       = {{10}},
  pages        = {{10291--10300}},
  title        = {{Voltage-controlled ON-OFF ferromagnetism at room temperature in a single metal oxide film}},
  url          = {{http://doi.org/10.1021/acsnano.8b05407}},
  volume       = {{12}},
  year         = {{2018}},
}

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