| Autor: |
Nishkala, K. R., Rao, Rajat Radhakrishna, Mutalik, Srinivas, Murari, M. S., Daivajna, Mamatha D. |
| Předmět: |
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| Zdroj: |
Applied Physics A: Materials Science & Processing; Aug2024, Vol. 130 Issue 8, p1-15, 15p |
| Abstrakt: |
La substituted M-type Barium hexaferrite, Ba(1−x)La(x)Fe12O19, (x = 0.25 and 0.30) were synthesized using ball milling followed by heat treatment at 1150˚C and 1300˚C and the influence of sintering temperature as well as La doping were presented. X-ray diffraction, FESEM, dielectric spectroscopy, and ferroelectric measurements were performed to study the structural, morphological, dielectric, and ferroelectric properties of the prepared samples. Rietveld refinement on the X-ray diffraction measurement reveals the formation of a phase magnetoplumbite structure of barium hexaferrite only for the samples sintered at 1300˚C. The secondary phase, along with the major magnetoplumbite structure, was observed for the sample sintered at 1150˚C. Hexagonal plate-like grains of different sizes were observed, and samples sintered at 1300˚C showed large-size grains. Porosity was observed to decrease with La doping. Impedance spectroscopy reveals that Maxwell-Wagner-type polarisation occurs with the relaxation of mobile charges having long-range hopping. However, the ferroelectric property was suppressed for samples sintered at 1300˚C. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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