Impact of Rare Earth Gd{sup 3+} Ions on Structural and Magnetic Properties of Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2−x}Gd{sub x}O{sub 4} Spinel Ferrite: Useful for Advanced Spintronic Technologies

Journal Article · Sun Apr 15 00:00:00 EDT 2018 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-017-4273-4· OSTI ID:22776978

Kumar, Ashwini; Shen, Jingdong; Yang, Wenbo; Zhao, Huihui ^[1]; Sharma, Poorva ^[2]; Varshney, Dinesh ^[3]; Li, Qi ^[1]

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1. Southeast University, Jiangning District, School of Physics (China)
2. Shanghai University, Department of Physics and International Centre for Quantum and Molecular Structures (ICQMS) (China)
3. Devi Ahilya University, School of Physics (India)

In this article, we have synthesized the Gd{sup 3+}-doped Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2−x}Gd{sub x}O{sub 4} (x = 0.05, 0.07, 1.0) ferrite samples using solid-state reaction route. The effects of Gd{sup 3+} doping on structural, vibrational, electrical and magnetic properties were studied. Structural and vibrational properties were characterized by x-ray diffraction (XRD), Raman, and FTIR spectroscopy. XRD data indicate that the Ni{sub 0.5}Zn{sub 0.5}Fe{sub 2−x}Gd{sub x}O{sub 4} ceramics crystallize in single-phase spinel cubic (Fd3m space group) structure. Infrared spectra show two strong absorption bands in the frequency range of 400–600 cm{sup −1} which were, respectively, attributed to tetrahedral and octahedral sites of the spinel ferrite. All the prepared samples show the typical dielectric dispersion having Maxwell–Wagner-type interfacial polarization. Decrease in dielectric constant and loss tangent has been observed with frequency and doping concentration. M − H plots reveal that all the samples exhibit ferrimagnetic nature at room temperature. A significant increase in the saturation magnetization has been observed upon the substitution of Gd{sup 3+} ions. All the as-prepared samples are isotropic and soft magnetic materials. These ferrite compounds are advantageous in advanced high-density data storage and high-frequency devices applications.

• OSTI ID: 22776978
• Journal Information: Journal of Superconductivity and Novel Magnetism, Vol. 31, Issue 4; Other Information: Copyright (c) 2018 Springer Science+Business Media, LLC, part of Springer Nature; Article Copyright (c) 2017 Springer Science+Business Media, LLC; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CERAMICS
CONCENTRATION RATIO
CUBIC LATTICES
DIELECTRIC MATERIALS
DOPED MATERIALS
FERRITES
FREQUENCY RANGE
GADOLINIUM IONS
MAGNETIC PROPERTIES
MAGNETIZATION
POLARIZATION
SOLIDS
SPACE GROUPS
SPINELS
TEMPERATURE RANGE 0273-0400 K
X-RAY DIFFRACTION