Resolving magnetic contributions in BiFeO3 nanoparticles using First order reversal curves
A. Cardona-Rodríguez, Edwin Ramos Rodríguez, D. Carranza-Celis, N. Vergara-Duran, A. S. E. da Cruz, O. Moscoso Londono, F. Beron, M. Knobel, A. Reiber, Diego Muraca, Juan Gabriel Ramírez
ARTIGO
Inglês
Agradecimentos: We acknowledge support from Facultad de Ciencias and Vicerrectoria de Investigaciones of Universidad de los Andes, Bogotá, Colombia. A.C.R acknowledges financial supportfrom proyectos semilla-Facultad de Ciencias at Universidad de los Andes (2019-II). E.R acknowledges...
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Agradecimentos: We acknowledge support from Facultad de Ciencias and Vicerrectoria de Investigaciones of Universidad de los Andes, Bogotá, Colombia. A.C.R acknowledges financial supportfrom proyectos semilla-Facultad de Ciencias at Universidad de los Andes (2019-II). E.R acknowledges Colciencias-Colfuturo Universidad Nacional de Colombia for its support under "convocatoria 617- Doctorados Nacionales". MK, A.S.E.C and FB acknowledge the support from Brazilian agencies Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) (projects #2017/10581-1 and #2020/07397-7) and Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) –Finance code 001 and projects 436573/2018-0 and #312762/2021-6
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Abstract: BiFeO3 (BFO) nanoparticles (NPs) were studied using First-Order Reversal Curve (FORC) and temperaturedependent magnetometry measurements. The BFO NPs were fabricated by a sol-gel method, while the crystal structure and the average particle radius were obtained by powder X-ray diffraction...
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Abstract: BiFeO3 (BFO) nanoparticles (NPs) were studied using First-Order Reversal Curve (FORC) and temperaturedependent magnetometry measurements. The BFO NPs were fabricated by a sol-gel method, while the crystal structure and the average particle radius were obtained by powder X-ray diffraction analysis and Small-Angle XRay Scattering (SAXS) measurements, respectively. The NP size varies below and above the typical bulk BFO spin cycloid length (lambda = 62 nm). Below lambda, the NPs show ferromagnetic-like hysteresis loops where the saturation magnetization decreases while nanoparticle size rises. This magnetic behavior changes for NP size over lambda, which only exhibits a paramagnetic contribution. The FORC distributions indicate the presence of two competing sizedependent contributions to the observed magnetic signal Also, the FORC distributions show that in the ferromagnetic regime there are two competing size-dependent contributions to the observed magnetic signal. Our results suggest the existence of a magnetic core-shell structure in NPs below lambda, possibly driven by the strong spin-lattice coupling
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FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP
2017/10581-1; 2020/07397-7
CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ
436573/2018-0; 312762/2021-6
Aberto
Resolving magnetic contributions in BiFeO3 nanoparticles using First order reversal curves
A. Cardona-Rodríguez, Edwin Ramos Rodríguez, D. Carranza-Celis, N. Vergara-Duran, A. S. E. da Cruz, O. Moscoso Londono, F. Beron, M. Knobel, A. Reiber, Diego Muraca, Juan Gabriel Ramírez
Resolving magnetic contributions in BiFeO3 nanoparticles using First order reversal curves
A. Cardona-Rodríguez, Edwin Ramos Rodríguez, D. Carranza-Celis, N. Vergara-Duran, A. S. E. da Cruz, O. Moscoso Londono, F. Beron, M. Knobel, A. Reiber, Diego Muraca, Juan Gabriel Ramírez
Fontes
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Journal of magnetism and magnetic materials Vol. 556 (Aug., 2022), n. art. 169409, p. 1-7 |