Mishra, Shubhankar and Sahoo, Aditi and Mondal, Suchanda and Mandal, P and Ghosh, Chandan Kumar and Bhattacharya, Dipten (2022) Electric-field-driven resistive transition in multiferroic SrCo2Fe16O27/Sr3Co2Fe24O41 composite. Journal of Applied Physics, 131 (20). Art No-204101. ISSN 0021-8979

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We report on the observation of electric-field-driven resistive transition abrupt rise in resistivity (p)] at a characteristic threshold field E-th(T) in an off-stoichiometric composite of W-and Z-type hexaferrite (-80%)SrCo2Fe16O27/(similar to 20%)Sr3Co2Fe24O41. The dielectric constant epsilon and the relaxation time constants tau also exhibit anomalous jump at E-th(T). The E-th(T), the extent of jump in resistivity (triangle rho), and the hysteresis associated with the jump |triangle E-th(T)| are found to decrease systematically with the increase in temperature (T) across a range of 10-200 K. They also depend on the extent of nonstoichiometry. In addition, several temperature-driven phase transitions have been noticed both in the low and high resistive states. The entire set of observations has been discussed within the framework of structural evolution of the point defect (cation vacancies or oxygen excess) network and its influence on electronic conduction. The magnetocapacitive effect, measured under similar to 20 kOe field, turns out to be substantial (similar to 4%-12%) and exhibits clear anomaly at E-th. This comprehensive map of esoteric rho -E -T and epsilon -E -T patterns provides insights on defect-driven effects in a multiferroic composite. These effects could be useful for tuning both the resistive transition and the multiferroicity. Published under an exclusive license by AIP Publishing.

Item Type: Article
Subjects: Electronics
Depositing User: Bidhan Chaudhuri
Date Deposited: 14 Sep 2023 10:37
Last Modified: 14 Sep 2023 10:37
URI: http://cgcri.csircentral.net/id/eprint/5483

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