Omar Diaz
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Omar Diaz has a total of 7 co-authors. Here are the top co-authors by number of shared publications:
- Andres Ayuela
Donostia International Physics Centre, Manuel Lardizabal, Ibilbidea 4, 20018 San Sebastian, Spain
1 shared publication - Antonio Hernando
Instituto de Magnetismo Aplicado (IMA), Universidad Complutense de Madrid-Administrador de Infraestructuras Ferroviarias (UCM-ADIF), 28230 Las Rozas, Spain
1 shared publication - Jose Luis Martinez
Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, 28049 Madrid, Spain
1 shared publication - Jose Maria González-Calbet
Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense, 28040 Madrid, Spain
1 shared publication - José María Alonso
Institute of Applied Magnetism, UCM-ADIF, A6 22,500 km, 28230 Las Rozas, Spain
1 shared publication - Maria Luisa Ruiz Gonzalez
Departamento de Química Inorgánica Facultad de Químicas Universidad Complutense 28040 Madrid Spain
1 shared publication
Latest Publications
- Open Access
- 10 May 2023
- Published by MDPI AG in Nanomaterials
- Vol. 13 (10) , 1601
Tuning Magnetoconductivity in LaMnO3 NPs through Cationic Vacancy Control
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.
- 10 May 2023
- Published by MDPI AG in Nanomaterials
- Vol. 13 (10) , 1601
Open AccessTuning Magnetoconductivity in LaMnO3 NPs through Cationic Vacancy Control
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.