An empirical model for magnetic field dependent resistivity and magnetoresistance in manganites: application on polycrystalline charge-ordered La0.4Gd0.1Ca0.5MnO3

In this paper, we have investigated the electrical and magnetic response of a La 0.4 Gd 0.1 Ca 0.5 MnO 3 polycrystalline sample. This sample seems to exhibit fascinating phenomena like charge ordering, magnetic phase separation, training effects and kinetic arrest. It also shows colossal values of n...

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Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2018, Vol.2 (18), p.1268-12617
Main Authors: Krichene, A, Boujelben, W, Mukherjee, S, Shah, N. A, Solanki, P. S
Format: Article
Language:English
Subjects:
Electrical resistivity
Magnetic fields
Magnetic properties
Magnetism
Magnetoresistance
Magnetoresistivity
Model testing
Phase separation
Polycrystals
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Summary:In this paper, we have investigated the electrical and magnetic response of a La 0.4 Gd 0.1 Ca 0.5 MnO 3 polycrystalline sample. This sample seems to exhibit fascinating phenomena like charge ordering, magnetic phase separation, training effects and kinetic arrest. It also shows colossal values of negative magnetoresistance (∼91.7% at 96 K under 1 T applied magnetic field), which raises the possibility of using this sample for technological applications. We have also proposed, in this work, a new empirical model to describe the evolution of resistivity and magnetoresistance as a function of magnetic field. This model was successfully tested on the La 0.4 Gd 0.1 Ca 0.5 MnO 3 sample in spite of its complicated magnetic behavior, which suggests the use of this model for other magnetic samples in order to check its validity. In this paper, we have investigated the electrical and magnetic response of a La 0.4 Gd 0.1 Ca 0.5 MnO 3 polycrystalline sample.
ISSN:1463-9076
1463-9084
DOI:10.1039/c8cp01486h