Effect of Copper Substitution on Magnetic Properties of NiFe2O4 Ferrite

The microstructure and magnetic properties of Mg – Cu – Zn ferrites prepared by using solid-state reaction method have been investigated. X-ray diffraction (XRD), a scanning electron microscope (SEM), impedance analyzer and a vibrating sample magnetometer (VSM) were utilized in order to study the effect of copper substitution and its impact on the crystal structure, grain size, microstructure and magnetic properties of the Mg – Cu – Zn ferrite. The formation of cubic spinel phase was identified using XRD technique. The microstructures of the samples show that the grain growth is greatly enhanced by the addition of CuO which is attributed to the liquid phase during sintering. The average grain size (Dm) increases significantly with increasing Cu content. The initial permeability (μ') of the samples increases appreciably with increasing Cu content which is attributed to the increase of grain size and density of the samples. The resonance frequency (fr) of the samples shifts toward the lower frequency as the Cu content increases. The sharp fall of μ' in μ'-T curves is observed for all the samples which indicate the homogeneity of the samples. The saturation magnetization (Ms) of the Mg – Cu – Zn ferrites increases slightly with increasing Cu concentration.

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Zn2W: Improvements of magnetic properties by copper substitution

Journal of Applied Physics ◽

10.1063/1.328990 ◽

1981 ◽

Vol 52 (3) ◽

pp. 2526-2528 ◽

Cited By ~ 22

Author(s):

F. Licci ◽

L. Pareti ◽

S. Rinaldi

Keyword(s):

Magnetic Properties ◽

Copper Substitution

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Effect of copper substitution on the structure of La0.7Sr0.25Nd0.05Mn1-xCuxO3 (x = 0, 0.03, 0.05, and 0.07) manganites

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/763/1/012074 ◽

2020 ◽

Vol 763 ◽

pp. 012074

Author(s):

D S Razaq ◽

D R Munazat ◽

B Soegijono ◽

B Kurniawan ◽

S Budiawanti ◽

...

Keyword(s):

Effect Of Copper ◽

Copper Substitution

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Effect of Copper Substitution on the Electrical Transport Properties of La0.7Ba0.1Sr0.2Mn1-xCuxO 3 (X = 0 and 0.05) Manganites

Materials Science Forum ◽

10.4028/www.scientific.net/msf.966.331 ◽

2019 ◽

Vol 966 ◽

pp. 331-337

Author(s):

Budhy Kurniawan ◽

Dhawud Sabilur Razaq ◽

Agung Imaduddin

Keyword(s):

Transport Properties ◽

Percolation Theory ◽

Electrical Transport ◽

Copper Content ◽

Morphological Properties ◽

Ferromagnetic Phase ◽

Rhombohedral Structure ◽

Electrical Transport Properties ◽

Effect Of Copper ◽

Copper Substitution

A systematic investigation of polycrystalline La0.7Ba0.1Sr0.2Mn1-xCuxO3 (x = 0 and 0.5) manganite has been conducted with a view to understand the effect of copper substitution on the electrical transport properties and its correlation with structural and morphological properties. The structural and morphological properties of the sample without copper content (x = 0) have been reported previously, while in this research, the structural and morphological properties of sample with 5% copper content (x = 0.5) will be reported. Structural comparison with previous research shows that 5% copper content does not change the rhombohedral structure of the sample without copper content. Comparison of resistivity (ρ) data with the theoretical model shows that the electrical properties of both samples are well described using the electron-electron, electron-phonon, electron-magnon, and kondo-like spin dependent scattering theory. Furthermore, percolation theory which have been used in the model shows that ferromagnetic phase and paramagnetic phase coexisted in both samples. Through copper substitution, the overall resistivity of the sample decrease compared to the sample without copper content. Furthermore, percolation theory demonstrates that ferromagnetic phase of the sample is decreasing as copper ions substituted manganese ion.

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