Effect of bimetallic (Ni and Co) substitution on magnetic properties of MnFe2O4 nanoparticles
Yükleniyor...
Dosyalar
Tarih
2016
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Nickel and cobalt substituted manganese ferrite nanoparticles (NPs) with the chemical composition NixCoxMn1–2xFe2O4 (0.0?x?0.5) NPs were synthesized by one-pot microwave combustion route. The effect of co-substitution (Ni, Co) on structural, morphological and magnetic properties of MnFe2O4 NPs was investigated using XRD, FT-IR, SEM, VSM and Mössbauer spectroscopic techniques. The cation distribution of all products were also calculated. Both XRD and FT-IR analyses confirmed the synthesis of single phase spinel cubic product for all the substitutions. Lattice constant decreases with the increase in concentration of both Co and Ni in the products. From 57Fe Mössbauer spectroscopy data, the variations in line width, isomer shift, quadrupole splitting and hyperfine magnetic field values with Mn2+, Ni2+ and Co2+ substitution have been determined. While the Mössbauer spectra collected at room temperature for the all samples are composed of magnetic sextets, the superparamagnetic doublet is also formed for MnFe2O4 and Ni0.2Co0.2Mn0.6Fe2O4 NPs. The magnetization and Mössbauer measurements verify that MnFe2O4 and Ni0.2Co0.2Mn0.6Fe2O4 NPs have superparamagnetic character. The saturation and remanence magnetizations, magnetic moment and coercive field were determined for all the samples. Room temperature VSM measurements reveals saturation magnetization value close to the bulk one. It has been observed that the saturation magnetization and coercive field increase with respect to the Ni and Co concentrations. © 2016 Elsevier Ltd and Techna Group S.r.l.
Açıklama
Anahtar Kelimeler
Magnetic nanomaterials, Magnetic property, Mössbauer spectroscopy, Spinel ferrites, Superparamagnetism, Cobalt, Cobalt compounds, Coercive force, Ferrites, Magnetic moments, Magnetic properties, Manganese compounds, Nanomagnetics, Nanoparticles, Nickel, Nickel compounds, Saturation magnetization, Superparamagnetism, Synthesis (chemical), Cation distributions, Chemical compositions, Hyperfine magnetic fields, Magnetic nanomaterials, Manganese ferrite nanoparticles, Spectroscopic technique, Spinel ferrites, Ssbauer spectroscopies, Iron compounds
Kaynak
Ceramics International
WoS Q Değeri
Scopus Q Değeri
Q1
Cilt
42
Sayı
12
