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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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Chicago
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): 10291–10300.
APA
Quintana, A., Menendez, E., Liedke, M. O., Butterling, M., Wagner, A., Sireus, V., Torruella, P., et al. (2018). Voltage-controlled ON-OFF ferromagnetism at room temperature in a single metal oxide film. ACS NANO, 12(10), 10291–10300.
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.
MLA
Quintana, Alberto et al. “Voltage-controlled ON-OFF Ferromagnetism at Room Temperature in a Single Metal Oxide Film.” ACS NANO 12.10 (2018): 10291–10300. Print.
@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},
  language     = {eng},
  number       = {10},
  pages        = {10291--10300},
  title        = {Voltage-controlled ON-OFF ferromagnetism at room temperature in a single metal oxide film},
  url          = {http://dx.doi.org/10.1021/acsnano.8b05407},
  volume       = {12},
  year         = {2018},
}

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