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Charge conduction mechanisms and MR behaviour of sol–gel-grown nanostructured La$_{0.6}$Nd$_{0.1}$Sr$_{0.3}$MnO$_3$ manganites
HETAL BORICHA S B KANSARA BHARGAV RAJYAGURU SAPANA SOLANKI K N RATHOD DAVIT DHRUV P S SOLANKI N A SHAH
Volume 43 Published: 2 September 2020 Article ID 0252
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Keywords
Charge conduction ;MR behaviour ;nanostructured ;manganites. -
Abstract
In this communication, structure and charge, conduction mechanisms have been understood for sol–gel grown nanostructured La$_{0.6}$Nd$_{0.1}$Sr$_{0.3}$MnO$_3$ (LNSMO) manganites prepared at different process temperatures under air and oxygen environments. Obtained X-ray diffraction patterns of all the samples were analysed using Rietveld refinements and obtained structural lattice parameters have been discussed in correlation with resistivity behaviour of the samples. Observed low temperature resistivity upturn behaviour has been examined in the context of electron–electron scattering mechanism. Metallic and insulating/semiconducting behaviours of all the nanostructured LNSMO manganites have been understood by using various models and mechanisms. Magnetoresistance isotherms have also been theoretically fitted and separate grain and grain boundary contributions have been studied for LNSMO manganite samples. Allobtained fitting parameters have been discussed in the context of role of applied magnetic field, process temperature and annealing environment.
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Author Affiliations
HETAL BORICHA1 S B KANSARA1 BHARGAV RAJYAGURU1 SAPANA SOLANKI1 K N RATHOD1 DAVIT DHRUV1 P S SOLANKI1 N A SHAH1
- Department of Physics, Saurashtra University, Rajkot 360 005, India
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Dates
- Published
- 2 September 2020
- Manuscript received
- 13 January 2020
- Accepted
- 5 June 2020
- Final version published online
- 2 September 2020
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