Unveiling the shape-selective CoCr2-yScyO4 nanomagnetism

Autor(es)

Angadi, V. Jagadeesha ^{[1, 2]} ; Manjunatha, K. ^[3] ; Oliveira, Marisa C. ^[4] ; Longo, Elson ^[4] ; de Lazaro, Sergio R. ^[5] ; Ribeiro, Renan A. P. ^[6] ; Bhat, S. V. ^[1]

Afiliação do(s) autor(es)

^[1] Indian Inst Sci, Dept Phys, Bangalore 560012, Karnataka - India

^[2] PC Jabin Sci Coll, Dept Phys, Hubballi 580031 - India

^[3] Presidency Univ, Sch Engn, Dept Phys, Bangalore 560064, Karnataka - India

^[4] Univ Fed Sao Carlos, Ctr Dev Funct Mat CDMF, Sao Carlos, SP - Brazil

^[5] Univ Estadual Ponta Grossa, Dept Chem, Ponta Grossa, PR - Brazil

^[6] Minas Gerais State Univ, Dept Chem, Divinopolis, MG - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Applied Surface Science; v. 574, FEB 1 2022.
• Citações Web of Science: 0

Resumo

In this study CoCr2-yScyO4 (y = 0, 0.01, 0.02, and 0.03) nanoparticles (NPs) have been synthesized following the solution combustion method and characterized by combining experimental techniques with high-throughput Density Functional Theory calculations. The structural analysis confirmed the crystalline nature with spinel cubic structure exhibiting an average particle size between 7 and 10 nm. The morphological analysis confirmed the exposure of the (220), (311), (400), and (422) planes in agreement with theoretical results based on Wulff Construction. Magnetic analysis indicated the existence of paramagnetic to ferrimagnetic phase transition at the critical temperature (Tc) and a conical spiral spin phase was found at the spiral transition temperature (Ts). In both the cases, the transition temperature was seen to decrease with increase in the Sc content in agreement with the exchange-coupling constants calculated by DFT, where a singular magneto-structural behavior was observed. Theoretical results for shape-oriented magnetic properties indicate the anisotropic spin density distribution and surface exposure, providing a general picture of shape-selective control of nanomagnetism. (AU)

• Processo FAPESP: 21/01651-1 - CDMF - Centro de Desenvolvimento de Materiais Funcionais: estudo teórico de materiais multifuncionais com potencial aplicação antiviral
• Beneficiário: Marisa Carvalho de Oliveira
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs