On the role of cationic distribution in determining magnetic properties of Zn0.7-xNixMg0.2Cu0.1Fe2O4 nano ferrite

• Tipo: Artigo em Revista Científica Internacional
• Data: 2017

Autores

Satalkar, M (Autor) Outra; Kane, SN (Autor) Outra; Kumaresavanji, M (Autor) Outra; araujo, j. p. (Autor) FCUP

Revista

Título: Materials Research Bulletin

Vol. 91

Páginas: 14-21

ISSN: 0025-5408

Editora: Elsevier

Indexação

ISI Web of Knowledge - 20 Citações

Scopus - 25 Citações

Outras Informações

ID Authenticus: P-00M-KM2

DOI: 10.1016/j.materresbull.2017.03.021

Abstract (EN): We report Ni addition induced changes in cationic distribution and its role in determining magnetic properties of Zn0.7-xNixMg0.2Cu0.1Fe2O4 (x = 0.0-0.7) nano ferrite synthesized by sol-gel auto-combustion method. X-ray diffraction demonstrates presence of cubic spinel phase, with crystallite size between 32.1-43.0 nm. Scanning electron microscope (SEM) images reveal modification of pore sizes. Saturation magnetization (M-s): 43.2-69.9 Am-2/kg and Neel magnetic moment (n(B)(N)):1.74-2.86 mu(B) increases up to x = 0.42, but at higher values of Ni content (0.42 < x <= 0.70) M-s and n(B)(N) decreases, accredited to migration of Fe3+ ions from A to B site or vice versa. With increasing Ni content, coercivity increases and range between 16.3-131.1 Oe. Zero values of Yafet-Kittel angle (alpha(Y-K)) suggest presence of Neel-type magnetic ordering in Zn0.7-x,NixMg0.2Cu0.1Fe2O4. Similar variation of bond angles (theta(B-B)(3), theta(B-B)(4)), M-s, n(B)(N) with Ni establishes the role of cationic distribution in determining magnetic properties.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8