Effect of Cu dopant on the structural, magnetic and electrical properties of Ni-Zn ferrites

Journal Article · Thu Feb 15 04:00:00 EST 2018 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2017.10.024· OSTI ID:22805403

Jamilpanah, L. ^[1]

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1. Department of Physics, Shahid Beheshti University, Evin, Tehran 19839 (Iran, Islamic Republic of)

Highlights: • Ni{sub 0.8-x}Cu{sub x}Zn{sub 0.2}Fe{sub 2}O{sub 4} (x = 0.0, 0.2, 0.4, 0.6) Spinel ferrites synthesized through auto-combustion method and their structural and magnetic properties investigated by XRD, SEM, FTIR and VSM measurements. • Increase in crystal and particle size and decrease in saturation magnetization resulted from substitution on Ni by Cu. • Observed values of (ε) and (tanδ) of the samples show the deterministic role of density in electrical properties of spinel ferrites. - Abstract: Ni{sub 0.8-x}Cu{sub x}Zn{sub 0.2}Fe{sub 2}O{sub 4} (x = 0.0, 0.2, 0.4, 0.6) ferrite was synthesized through auto-combustion method. (XRD) patterns confirmed the crystallization of the samples in spinel structure. FESEM showed that the size of ferrite particles are about few hundred nanometers and with increase in Cu concentration (x) in the structure there is increase in particle size. Fourier transform infrared (FTIR) spectrometry indicates that octahedral and tetrahedral sites are formed. Vibrating sample magnetometer (VSM) results proved reduction of saturation magnetization (M{sub s}) by increasing Cu content, which is explained according to the ferrimagnetic nature of these samples in which Ni is replaced by Cu at octahedral site. Real part of dielectric constant (ε) and loss tangent (tanδ) of samples were also studied in frequency range of 100–20000 Hz. Results showed an increase in ε and tanδ of the sample with x = 0.6 which is considered to be the result of higher density of this sample.

• OSTI ID: 22805403
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 98; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COMBUSTION
CONCENTRATION RATIO
CRYSTALLIZATION
DIELECTRIC MATERIALS
DOPED MATERIALS
ELECTRICAL PROPERTIES
FERRITES
FOURIER TRANSFORM SPECTROMETERS
KHZ RANGE
MAGNETIC PROPERTIES
MAGNETIZATION
NICKEL COMPOUNDS
PARTICLE SIZE
SCANNING ELECTRON MICROSCOPY
SPINELS
VIBRATING SAMPLE MAGNETOMETERS
X-RAY DIFFRACTION
ZINC COMPOUNDS