Observation of magnetic vortex configuration in non-stoichiometric Fe3O4 nanospheres

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dc.contributor.authorNiraula, Gopal
dc.contributor.authorToneto, Denilson
dc.contributor.authorGoya, Gerardo F.
dc.contributor.authorZoppellaro, Giorgio
dc.contributor.authorCoaquira, Jose A. H.
dc.contributor.authorMuraca, Diego
dc.contributor.authorDenardin, Juliano C.
dc.contributor.authorAlmeida, Trevor P.
dc.contributor.authorKnobel, Marcelo
dc.contributor.authorAyesh, Ahmad I.
dc.contributor.authorSharma, Surender K.
dc.date.accessioned2024-01-21T10:42:56Z
dc.date.accessioned2024-08-13T12:45:01Z
dc.date.available2024-01-21T10:42:56Z
dc.date.available2024-08-13T12:45:01Z
dc.date.issued2023-08-31T00:00:00
dc.description.abstractTheoretical and micromagnetic simulation studies of magnetic nanospheres with vortex configurations suggest that such nanostructured materials have technological advantages over conventional nanosystems for applications based on high-power-rate absorption and subsequent emission. However, full experimental evidence of magnetic vortex configurations in spheres of submicrometer size is still lacking. Here, we report the microwave irradiation fabrication of Fe3O4 nanospheres and establish their magnetic vortex configuration based on experimental results, theoretical analysis, and micromagnetic simulations. Detailed magnetic and electrical measurements, together with M�ssbauer spectroscopy data, provide evidence of a loss of stoichiometry in vortex nanospheres owing to the presence of a surface oxide layer, defects, and a higher concentration of cation vacancies. The results indicate that the magnetic vortex spin configuration can be established in bulk spherical magnetite materials. This study provides crucial information that can aid the synthesis of magnetic nanospheres with magnetically tailored properties; consequently, they may be promising candidates for future technological applications based on three-dimensional magnetic vortex structures. � 2023 RSC.en_US
dc.identifier.doi10.1039/d3na00433c
dc.identifier.issn25160230
dc.identifier.urihttp://10.2.3.109/handle/32116/3776
dc.identifier.urlhttp://xlink.rsc.org/?DOI=D3NA00433C
dc.language.isoen_USen_US
dc.publisherRoyal Society of Chemistryen_US
dc.subjectMagnetiteen_US
dc.subjectMicrowave irradiationen_US
dc.subjectNanomagneticsen_US
dc.subjectNanosystemsen_US
dc.subjectVortex flowen_US
dc.subjectExperimental evidenceen_US
dc.subjectHigh power ratesen_US
dc.subjectMagnetic nanospheresen_US
dc.subjectMagnetic vorticesen_US
dc.subjectMicromagnetic simulationsen_US
dc.subjectNonstoichiometricen_US
dc.subjectSimulation studiesen_US
dc.subjectSubmicrometersen_US
dc.subjectTheoretical simulationen_US
dc.subjectVortex configurationsen_US
dc.subjectNanospheresen_US
dc.titleObservation of magnetic vortex configuration in non-stoichiometric Fe3O4 nanospheresen_US
dc.title.journalNanoscale Advancesen_US
dc.typeArticleen_US
dc.type.accesstypeOpen Accessen_US

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