Dynamics of the incorporation of Co into the wurtzite ZnO matrix and its magnetic properties

6533b854fe1ef96bd12aeb61

RESEARCH PRODUCT

Dynamics of the incorporation of Co into the wurtzite ZnO matrix and its magnetic properties

M. M. De Lima M. A. Boselli R.t. Da Silva Xavier Gratens F. P. Rhodes Antonio C. Doriguetto A. O. De Zevallos Marcello Rubens Barsi Andreeta Andrés Cantarero Antônio Claret Soares Sabioni W. B. Ferraz Valmir Antonio Chitta Alexandre Mesquita H. B. De Carvalho I.s. Da Silva P. P. Neves

subject

Materials science Spintronics Mechanical Engineering Metals and Alloys Analytical chemistry Phase diagram Ion Matrix (chemical analysis)Condensed Matter::Materials Science Paramagnetism Nuclear magnetic resonance Spintronic Mechanics of Materials Phase (matter)visual_art Magnetic properties Dilute magnetic oxide Materials Chemistry visual_art.visual_art_medium Zn1-xCoxO Ceramic Co distribution Phase diagram Wurtzite crystal structure

description

Made available in DSpace on 2022-04-29T07:25:55Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-07-25 Financiadora de Estudos e Projetos Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Abstract Bulk Co-doped ZnO (Zn1-xCoxO) samples were prepared and studied with particular emphasis on their compositions, structures, and magnetic properties. A detailed microstructural analysis was conducted to investigate the nature of Co incorporation into the wurtzite ZnO matrix. The Zn1-xCoxO ceramic samples were prepared using the standard solid-state reaction method with different Co molar concentrations of up to 30%. A Co solubility limit of approximately 23% was determined. For samples with Co concentrations greater than 23%, a segregated phase identified as Zn-doped CoO (Co1-yZnyO with y = 0.23) was observed. The magnetic characterization for the single-phase samples revealed a paramagnetic behavior with antiferromagnetic coupling of Co2+ ions within the ZnO matrix. In order to get more insight about the magnetic results Monte Carlo simulations were conducted for different magnetic couplings and different Co distributions over the volume of the samples. We discussed the observed magnetic behavior of our samples by considering the main theories regarding the magnetic properties of dilute magnetic oxides. An inhomogeneous distribution of Co ions within the grains was inferred from the microstructural and magnetic characterization. Universidade Federal de Alfenas Universidade Federal de Ouro Preto Departamento de Engenharia de Materiais, Universidade Federal de São Carlos University of Valencia, Materials Science Institute Universidade Federal de Uberlândia Instituto de Física, Universidade de São Paulo Centro de Desenvolvimento de Tecnologia Nuclear/CNEN Departamento de Física, Instituto de Geociências e Ciências Exatas, Universidade Estadual Paulista Departamento de Física, Instituto de Geociências e Ciências Exatas, Universidade Estadual Paulista Financiadora de Estudos e Projetos: 134/08 CNPq: 476870/2011-9 Financiadora de Estudos e Projetos: MAT2012-33483 CAPES: PNPD-2011

year	journal	country	edition	language
2015-07-01	Journal of Alloys and Compounds

https://doi.org/10.1016/j.jallcom.2015.03.004