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Crossover of positive and negative magnetoconductance in composites of nanosilica glass containing dual transition metal oxides
A facile sol–gel approach to prepare composites of nanosilica glass containing dual transition metal oxides with compositions xCoO·(20 − x)NiO·80SiO(2) comprising x values 5 (NC-1), 10 (NC-2) and 15 (NC-3) within hexagonal pores of SBA-15 template has been demonstrated. The synergistic effect of dua...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9030562/ https://www.ncbi.nlm.nih.gov/pubmed/35481159 http://dx.doi.org/10.1039/d1ra02215f |
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author | Samanta, Subha Maity, Anupam Chatterjee, Alorika Giri, Saurav Chakravorty, Dipankar |
author_facet | Samanta, Subha Maity, Anupam Chatterjee, Alorika Giri, Saurav Chakravorty, Dipankar |
author_sort | Samanta, Subha |
collection | PubMed |
description | A facile sol–gel approach to prepare composites of nanosilica glass containing dual transition metal oxides with compositions xCoO·(20 − x)NiO·80SiO(2) comprising x values 5 (NC-1), 10 (NC-2) and 15 (NC-3) within hexagonal pores of SBA-15 template has been demonstrated. The synergistic effect of dual transition metal oxide ions on MD properties and crossover of positive and negative magnetoconductance phenomena were observed in these nanocomposite systems. The physical origin of magnetoconductance switching is explained based on the factors: nanoconfinement effect, wave-function shrinkage and spin polarized electron hopping. DFT calculations were performed to understand the structural correlation of the nanoconfined system. The static (dc) and dynamic (ac) responses of magnetization revealed the spin-glass behaviour of the investigated samples. Both scaling law and Vogel–Fulcher law provide a satisfactory fit to our experimental results which are considered as a salient feature of the spin-glass system. Our studies indicate the possibilities of fabricating magnetically controlled multifunctional devices. |
format | Online Article Text |
id | pubmed-9030562 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-90305622022-04-26 Crossover of positive and negative magnetoconductance in composites of nanosilica glass containing dual transition metal oxides Samanta, Subha Maity, Anupam Chatterjee, Alorika Giri, Saurav Chakravorty, Dipankar RSC Adv Chemistry A facile sol–gel approach to prepare composites of nanosilica glass containing dual transition metal oxides with compositions xCoO·(20 − x)NiO·80SiO(2) comprising x values 5 (NC-1), 10 (NC-2) and 15 (NC-3) within hexagonal pores of SBA-15 template has been demonstrated. The synergistic effect of dual transition metal oxide ions on MD properties and crossover of positive and negative magnetoconductance phenomena were observed in these nanocomposite systems. The physical origin of magnetoconductance switching is explained based on the factors: nanoconfinement effect, wave-function shrinkage and spin polarized electron hopping. DFT calculations were performed to understand the structural correlation of the nanoconfined system. The static (dc) and dynamic (ac) responses of magnetization revealed the spin-glass behaviour of the investigated samples. Both scaling law and Vogel–Fulcher law provide a satisfactory fit to our experimental results which are considered as a salient feature of the spin-glass system. Our studies indicate the possibilities of fabricating magnetically controlled multifunctional devices. The Royal Society of Chemistry 2021-04-30 /pmc/articles/PMC9030562/ /pubmed/35481159 http://dx.doi.org/10.1039/d1ra02215f Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/ |
spellingShingle | Chemistry Samanta, Subha Maity, Anupam Chatterjee, Alorika Giri, Saurav Chakravorty, Dipankar Crossover of positive and negative magnetoconductance in composites of nanosilica glass containing dual transition metal oxides |
title | Crossover of positive and negative magnetoconductance in composites of nanosilica glass containing dual transition metal oxides |
title_full | Crossover of positive and negative magnetoconductance in composites of nanosilica glass containing dual transition metal oxides |
title_fullStr | Crossover of positive and negative magnetoconductance in composites of nanosilica glass containing dual transition metal oxides |
title_full_unstemmed | Crossover of positive and negative magnetoconductance in composites of nanosilica glass containing dual transition metal oxides |
title_short | Crossover of positive and negative magnetoconductance in composites of nanosilica glass containing dual transition metal oxides |
title_sort | crossover of positive and negative magnetoconductance in composites of nanosilica glass containing dual transition metal oxides |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9030562/ https://www.ncbi.nlm.nih.gov/pubmed/35481159 http://dx.doi.org/10.1039/d1ra02215f |
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