Magnetoelectric coupling and dielectric spectroscopy up to Ku band frequency of strongly ferroic oxide composites

Pandya, Rutvi J.; Joshi, U. S.

doi:10.1016/j.ceramint.2018.08.256

Cited by 10 publications

(1 citation statement)

References 36 publications

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“…frequency independent as can be seen in figure 5. It is understood that at higher frequency regions, the charge carriers cannot switch fast enough with the variations in the applied field AC field [36,37], whereas in the lower frequency region, the electric dipole follows the frequency of the applied field and responds to it swiftly. The dielectric behavior on the basis of space charge polarization is largely mediated by Fe +2 , Fe +3 , Mn +3 and Mn +4 ions and corresponding electron hopping mechanisms such as Fe +2 <=> Fe +3 and Mn +3 <=> Mn +4 etc and charge balanced Mn +3 +Fe +3 <=> Fe +2 +Mn +4 pairs [38].…”

Section: Magnetodielectric (Md) Propertiesmentioning

confidence: 99%

Magnetotransport properties of Fe substituted Ca₃CoMnO₆

et al. 2021

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Ca3CoMnO6, a quasi-1D Ising chain at low temperature offers rich fundamental physics and applications. We have studied the dielectric and magnetoelectric coupling in Fe doped Ca3CoMnO6 (CCMO) bulk ceramics prepared by co-precipitation technique. Single phase hexagonal crystal structure having R-3C space group was confirmed by x-ray diffraction. Extremely low currents were observed up to 20% Fe doping. Doping dependence of magnetoresistance (MR) revealed both positive and negative MR, with anomalously high MR values beyond 3000% in diluted Fe doped CCMO; whereas the higher doping of Fe was found to result in negative MR due to enhanced magnetostriction effects. The dielectric study was carried out for a range of 20 Hz to 10 MHz. The negative value of the colossal magnetodielectric induced in the Fe doped samples can be attributed to the magnetostriction effect along with interfacial Maxwell-Wagner polarization.

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Section: Magnetodielectric (Md) Propertiesmentioning

confidence: 99%