Impact of Lanthanum-Doping on the Physical and Electrical Properties of Cobalt Ferrites

Autor: M. Ajaz un Nabi, Khalid Mahmood, Sumera Naz, Muhammad Zahir Iqbal, Nasir Amin, Faisal Iqbal, Syed Shabhi Haider, Zahid Farooq, Abdul Razzaq, Muhammad Imran Arshad, Asma Aslam, Muhammad Shakil, Aisha Bibi, Atta Ur Rehman, Abid Nawaz
Rok vydání: 2021
Předmět:
Zdroj: Journal of Superconductivity and Novel Magnetism. 34:1855-1864
ISSN: 1557-1947
1557-1939
DOI: 10.1007/s10948-021-05802-4
Popis: Cobalt ferrites have attracted extraordinary attention due to their high coercivity, chemical stability, and mechanical hardness. Lanthanum doped-cobalt ferrites having chemical formula CoLaxFe2-xO4 with composition x = (0.00, 0.015, 0.045, 0.060) were synthesized by chemical co-precipitation method. The prepared samples were characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, and current-voltage (I-V) technique. The structure of the crystal was analyzed by X-ray diffraction. The crystallite size of nanoparticles was examined in the range of 21–25 nm, and a fluctuating trend was found with the inclusion of La3+ cations. The X-ray diffraction patterns verify the contraction of lattice constant and unit cell volume with the substitution of La3+ cations except for the concentration of x = 0.060. Lattice constant was in the range of 8.34 A–8.41 A while unit volume cell was in the range of 580 A3–596 A3. The resistivity of all samples was calculated by the application of two probes I-V technique. The maximum resistivity of the order of 81.129 × 105 Ω cm was found for the concentration of x = 0.060 at 723 K which makes it useful for high-frequency gimmicks applications. The resistivity and drift mobility were found inversely related to each other. The inverse relation low-frequency absorption band and high-frequency absorption bands were analyzed by Fourier-transform infrared spectroscopy technique.
Databáze: OpenAIRE
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