Sensing characteristics and EPIR Studies on composite manganites: Role of nanoparticles in the micronsized matrix lattice

•Transport properties of manganite–manganite composites•Strong influence of nano and micro particles on transport properties•Synthesis of nanostructured manganite fillers using sol–gel technique•Role of complex phase separation scenario in charge conduction mechanisms•Possible practical applications...

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Bibliographic Details
Published in:Materials research bulletin 2024-05, Vol.173, p.112680, Article 112680
Main Authors: Gohil, Hardik, Gadani, Keval, Boricha, Hetal, Rajyaguru, Bhargav, Dadhich, Himanshu, Raval, Nisarg, Dhruv, Davit, Rathod, V.R., Barde, N.P., Bardapurkar, P.P., Gohel, R.J., Asokan, K., Shah, N.A., Solanki, P.S.
Format: Article
Language:English
Subjects:
Composites
Magnetoresistance
Manganites
Oxides
Phase separation
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Summary:•Transport properties of manganite–manganite composites•Strong influence of nano and micro particles on transport properties•Synthesis of nanostructured manganite fillers using sol–gel technique•Role of complex phase separation scenario in charge conduction mechanisms•Possible practical applications of manganite based powder composites In the present communication, the electrical transport properties have been investigated for manganite-based composites consisting of different weight fractions of nanoparticles of LaMnO3 (LMO) and polycrystalline La0.7Ca0.3MnO3 (LCMO). A complex phase separation scenario has been proposed to understand the hysteretic resistive nature exhibited by manganite matrix composites. The role of complex phase separation has been discussed for the manganite composite resistivity and temperature coefficient of resistance (TCR) dependence on temperature, thermal cycle, current and LMO content as well as their sensitivity for voltage and current have also been examined. Observed electric pulse-induced resistance (EPIR) switching in these composites under different applied voltages and magnetic fields have been understood based on a complex phase separation scenario and the formation–rupture of conducting filamentary paths. Tuning of magnetic field-dependent resistance and magnetoresistance (MR) with the influence of different resistance states of LMO–LCMO composites has been understood in depth. [Display omitted]
ISSN:0025-5408
1873-4227
DOI:10.1016/j.materresbull.2024.112680