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Tuning Magnetoconductivity in LaMnO3 NPs through Cationic Vacancy Control
Tuning Magnetoconductivity in LaMnO3 NPs through Cationic Vacancy Control
- Source :
- Nanomaterials, Vol 13, Iss 10, p 1601 (2023)
- Publication Year :
- 2023
- Publisher :
- MDPI AG, 2023.
-
Abstract
- The inclusion of La-Mn vacancies in LaMnO3 nanoparticles leads to a noticeable change in conductivity behavior. The sample retains its overall insulator characteristic, with a typical thermal activation mechanism at high temperatures, but it presents high magnetoconductivity below 200 K. The activation energy decreases linearly with the square of the reduced magnetization and vanishes when the sample is magnetized at saturation. Therefore, it turns out that electron hopping between Mn3+ and Mn4+ largely contributes to the conductivity below the Curie temperature. The influence of the applied magnetic field on conductivity also supports the hypothesis of hopping contribution, and the electric behavior can be explained as being due to an increase in the hopping probability via spin alignment.
Details
- Language :
- English
- ISSN :
- 20794991
- Volume :
- 13
- Issue :
- 10
- Database :
- Directory of Open Access Journals
- Journal :
- Nanomaterials
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.272d0a679ae54f74a669e6fa5d172819
- Document Type :
- article
- Full Text :
- https://doi.org/10.3390/nano13101601