Study of the correlation between the magnetic and electrical properties of the La 0.6 Sr 0.4 MnO 3 compound

• Published in: RSC advances Vol. 14; no. 30; pp. 21692 - 21705
• Main Authors: Gharsallah, H, Jeddi, M, Bejar, M, Dhahri, E, Nouari, S
• Format: Journal Article
• Language: English
• Published: England 05.07.2024
• ISSN: 2046-2069; 2046-2069
• DOI: 10.1039/D4RA03528C

In this work, we investigated the relationship between the electrical and magnetic properties of the superparamagnetic (SPM) La Sr MnO (S1C0) compound prepared by the sol-gel method. The (S1C0) sample displayed a ferromagnetic metallic (FMM) behavior at low temperatures and a paramagnetic semiconductor (PMSC) behavior at high temperatures. The FMM behavior was described by the Zener Double Exchange (ZDE) polynomial law containing the contributions of the electron-electron (e-e) interactions and the electron-magnon (e-m) scattering. The PMSC behavior was described by the Mott Variable Range Hopping (Mott-VRH) transport model. The semiconductor/metallic transition temperature has been approximated at the blocking temperature. The Thermal Coefficient of Resistivity (TCR), which exhibits a linear variation around ambient temperature, can be used as a calibration curve for thermometry. Thus, our sample can be considered as a good candidate for the detection of infrared radiation used in night vision bolometer technologies.