Indian Journal of Pure and Applied Physics

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Anisotropy Induced Tunable Magnetic Properties of Chemically Synthesized Copper Ferrite (CuxFe1-xO4) Nanoparticles with Different Composition


Affiliations
1 Department of Physics, L.N.D. College, Motihari, B.R. Ambedkar Bihar University, Muzaffarpur, Bihar, 842 001, India
2 Department of Physics, Jadavpur University, Kolkata 700 032, India
 

Here we report the structural and magnetic properties of cluster of ultrafine copper ferrite (CuxFe1-xO4) nanoparticles with different Cu:Fe composition synthesized by aqueous chemical reduction technique. The morphological, microstructural and compositional studies confirm the formation ofCuxFe1-xO4 nanoparticles with varied Cu and Fe percentages which are polycrystalline in nature with fcc structure and average size of ~20 nm. Thermal stability and chemically purity of ferrite nanoparticles are ensured by analyzing the TGA/DTA curve in the temperature range 30-1000 oC. Magnetization vs magnetic field (M-H) hysteresis loops measured at two different temperatures (80K and 300K) reveal the typical ferromagnetic behavior ofCuxFe1-xO4nanoparticles with a systematic change in the saturation magnetization (MS), coercive field (Hc), remanent magnetization (Mr), Squareness (Mr/MS), hardness (α) and effective anisotropy energy constant (Keff) with the variation of Cu and Fe percentages. Tunable magnetic properties of ferrite nanoparticles with the variation of magnetic Fe and non-magnetic Cu are attributed to the modulation of effective anisotropy originated from the surface spin randomization.

Keywords

Soft magnetic materials; Ferrites; Nanoparticles; Magnetic properties.
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  • Anisotropy Induced Tunable Magnetic Properties of Chemically Synthesized Copper Ferrite (CuxFe1-xO4) Nanoparticles with Different Composition

Abstract Views: 94  |  PDF Views: 52

Authors

Pinaki Laha
Department of Physics, L.N.D. College, Motihari, B.R. Ambedkar Bihar University, Muzaffarpur, Bihar, 842 001, India
Rabindra Nath Gayen
Department of Physics, Jadavpur University, Kolkata 700 032, India

Abstract


Here we report the structural and magnetic properties of cluster of ultrafine copper ferrite (CuxFe1-xO4) nanoparticles with different Cu:Fe composition synthesized by aqueous chemical reduction technique. The morphological, microstructural and compositional studies confirm the formation ofCuxFe1-xO4 nanoparticles with varied Cu and Fe percentages which are polycrystalline in nature with fcc structure and average size of ~20 nm. Thermal stability and chemically purity of ferrite nanoparticles are ensured by analyzing the TGA/DTA curve in the temperature range 30-1000 oC. Magnetization vs magnetic field (M-H) hysteresis loops measured at two different temperatures (80K and 300K) reveal the typical ferromagnetic behavior ofCuxFe1-xO4nanoparticles with a systematic change in the saturation magnetization (MS), coercive field (Hc), remanent magnetization (Mr), Squareness (Mr/MS), hardness (α) and effective anisotropy energy constant (Keff) with the variation of Cu and Fe percentages. Tunable magnetic properties of ferrite nanoparticles with the variation of magnetic Fe and non-magnetic Cu are attributed to the modulation of effective anisotropy originated from the surface spin randomization.

Keywords


Soft magnetic materials; Ferrites; Nanoparticles; Magnetic properties.

References