Highly cyclable voltage control of magnetism in cobalt ferrite nanopillars for memory and neuromorphic applications
de h-Óra, Muireann (University of Cambridge)
Nicolenco, Aliona (Universitat Autònoma de Barcelona. Departament de Física)
Monalisha, P. (Universitat Autònoma de Barcelona. Departament de Física)
Maity, Tuhin (Indian Institute of Science Education and Research Thiruvananthapuram)
Zhu, Bonan (University College London)
Lee, Shinbuhm (University of Cambridge. Daegu Gyeongbuk Institute of Science and Technology)
Sun, Zhuotong (University of Cambridge)
Sort Viñas, Jordi (Universitat Autònoma de Barcelona. Departament de Física)
Driscoll, Judith (University of Cambridge)

Fecha:	2023
Resumen:	Tuning the properties of magnetic materials by voltage-driven ion migration (magneto-ionics) gives potential for energy-efficient, non-volatile magnetic memory and neuromorphic computing. Here, we report large changes in the magnetic moment at saturation (mS) and coercivity (HC), of 34% and 78%, respectively, in an array of CoFe2O4 (CFO) epitaxial nanopillar electrodes (∼50 nm diameter, ∼70 nm pitch, and 90 nm in height) with an applied voltage of -10 V in a liquid electrolyte cell. Furthermore, a magneto-ionic response faster than 3 s and endurance >2000 cycles are demonstrated. The response time is faster than for other magneto-ionic films of similar thickness, and cyclability is around two orders of magnitude higher than for other oxygen magneto-ionic systems. Using a range of characterization techniques, magnetic switching is shown to arise from the modulation of oxygen content in the CFO. Also, the highly cyclable, self-assembled nanopillar structures were demonstrated to emulate various synaptic behaviors, exhibiting non-volatile, multilevel magnetic states for analog computing and high-density storage. Overall, CFO nanopillar arrays offer the potential to be used as interconnected synapses for advanced neuromorphic computing applications.
Ayudas:	European Commission 861145 European Commission 882929 European Commission 101054687 Agencia Estatal de Investigación PID2020-116844RB-C21 Agencia Estatal de Investigación PDC2021-121276-C31 Agencia Estatal de Investigación PID2020116844RB-C22 Agencia Estatal de Investigación PDC2021-121276-C32 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-00651 European Commission 892661
Derechos:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió publicada
Publicado en:	APL materials, Vol. 11, Issue 5 (May 2023) , art. 051105, ISSN 2166-532X

DOI: 10.1063/5.0147665

11 p, 7.4 MB

El registro aparece en las colecciones:
Documentos de investigación > Documentos de los grupos de investigación de la UAB > Centros y grupos de investigación (producción científica) > Ciencias > Grupo de nanoingeniería de materiales, nanomagnetismo y nanomecánica (Gnm3)
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