The physical properties of submicron and nano-grained La0.7Sr0.3MnO3 and Nd0.7Sr0.3MnO3 synthesised by sol–gel and solid-state reaction methods
La0.7Sr0.3MnO3 (LSMO) and Nd0.7Sr0.3MnO3 (NSMO) possess excellent colossal magnetoresistance (CMR). However, research work on the neodymium-based system is limited to date. A comparative study between LSMO and NSMO prepared by sol–gel and solid-state reaction methods was undertaken to assess their s...
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MDPI AG
2021
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Online Access: | http://psasir.upm.edu.my/id/eprint/95558/1/The%20physical%20properties%20of%20submicron%20and%20nano-grained%20la0.7Sr0.3MnO3%20and%20Nd0.7Sr0.3MnO3%20synthesised%20by%20sol%E2%80%93gel%20and%20solid-state%20reaction%20methods.pdf http://psasir.upm.edu.my/id/eprint/95558/ https://www.mdpi.com/2079-6412/11/3/361 |
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my.upm.eprints.955582022-08-02T07:10:55Z http://psasir.upm.edu.my/id/eprint/95558/ The physical properties of submicron and nano-grained La0.7Sr0.3MnO3 and Nd0.7Sr0.3MnO3 synthesised by sol–gel and solid-state reaction methods Lau, Lik Nguong Lim, Kean Pah Ishak, Amirah Natasha Kechik, Mohd Mustafa Awang Chen, Soo Kien Ibrahim, Noor Baa’yah Miryala, Muralidhar Murakami, Masato Shaari, Abdul Halim La0.7Sr0.3MnO3 (LSMO) and Nd0.7Sr0.3MnO3 (NSMO) possess excellent colossal magnetoresistance (CMR). However, research work on the neodymium-based system is limited to date. A comparative study between LSMO and NSMO prepared by sol–gel and solid-state reaction methods was undertaken to assess their structural, microstructural, magnetic, electrical, and magneto-transport properties. X-ray diffraction and structure refinement showed the formation of a single-phase composition. Sol–gel-synthesised NSMO was revealed to be a sample with single crystallite grains and exhibited intriguing magnetic and electrical transport behaviours. Magnetic characterisation highlighted that Curie temperature (TC) decreases with the grain size. Strong suppression of the metal–insulator transition temperature (TMI) was observed and attributed to the magnetically disordered grain surface and distortion of the MnO6 octahedra. The electrical resistivity in the metallic region was fitted with theoretical models, and the conduction mechanism could be explained by the grain/domain boundary, electron–electron, and electron–magnon scattering process. The increase in the scattering process was ascribed to the morphology changes. Enhancement of low-field magnetoresistance (LFMR) was observed in nano-grained samples. The obtained results show that the grain size and its distribution, as well as the crystallite formation, strongly affect the physical properties of hole-doped manganites. MDPI AG 2021 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/95558/1/The%20physical%20properties%20of%20submicron%20and%20nano-grained%20la0.7Sr0.3MnO3%20and%20Nd0.7Sr0.3MnO3%20synthesised%20by%20sol%E2%80%93gel%20and%20solid-state%20reaction%20methods.pdf Lau, Lik Nguong and Lim, Kean Pah and Ishak, Amirah Natasha and Kechik, Mohd Mustafa Awang and Chen, Soo Kien and Ibrahim, Noor Baa’yah and Miryala, Muralidhar and Murakami, Masato and Shaari, Abdul Halim (2021) The physical properties of submicron and nano-grained La0.7Sr0.3MnO3 and Nd0.7Sr0.3MnO3 synthesised by sol–gel and solid-state reaction methods. Coatings, 11 (3). art. no. 361. pp. 1-15. ISSN 2079-6412 https://www.mdpi.com/2079-6412/11/3/361 10.3390/coatings11030361 |
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La0.7Sr0.3MnO3 (LSMO) and Nd0.7Sr0.3MnO3 (NSMO) possess excellent colossal magnetoresistance (CMR). However, research work on the neodymium-based system is limited to date. A comparative study between LSMO and NSMO prepared by sol–gel and solid-state reaction methods was undertaken to assess their structural, microstructural, magnetic, electrical, and magneto-transport properties. X-ray diffraction and structure refinement showed the formation of a single-phase composition. Sol–gel-synthesised NSMO was revealed to be a sample with single crystallite grains and exhibited intriguing magnetic and electrical transport behaviours. Magnetic characterisation highlighted that Curie temperature (TC) decreases with the grain size. Strong suppression of the metal–insulator transition temperature (TMI) was observed and attributed to the magnetically disordered grain surface and distortion of the MnO6 octahedra. The electrical resistivity in the metallic region was fitted with theoretical models, and the conduction mechanism could be explained by the grain/domain boundary, electron–electron, and electron–magnon scattering process. The increase in the scattering process was ascribed to the morphology changes. Enhancement of low-field magnetoresistance (LFMR) was observed in nano-grained samples. The obtained results show that the grain size and its distribution, as well as the crystallite formation, strongly affect the physical properties of hole-doped manganites. |
format |
Article |
author |
Lau, Lik Nguong Lim, Kean Pah Ishak, Amirah Natasha Kechik, Mohd Mustafa Awang Chen, Soo Kien Ibrahim, Noor Baa’yah Miryala, Muralidhar Murakami, Masato Shaari, Abdul Halim |
spellingShingle |
Lau, Lik Nguong Lim, Kean Pah Ishak, Amirah Natasha Kechik, Mohd Mustafa Awang Chen, Soo Kien Ibrahim, Noor Baa’yah Miryala, Muralidhar Murakami, Masato Shaari, Abdul Halim The physical properties of submicron and nano-grained La0.7Sr0.3MnO3 and Nd0.7Sr0.3MnO3 synthesised by sol–gel and solid-state reaction methods |
author_facet |
Lau, Lik Nguong Lim, Kean Pah Ishak, Amirah Natasha Kechik, Mohd Mustafa Awang Chen, Soo Kien Ibrahim, Noor Baa’yah Miryala, Muralidhar Murakami, Masato Shaari, Abdul Halim |
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Lau, Lik Nguong |
title |
The physical properties of submicron and nano-grained La0.7Sr0.3MnO3 and Nd0.7Sr0.3MnO3 synthesised by sol–gel and solid-state reaction methods |
title_short |
The physical properties of submicron and nano-grained La0.7Sr0.3MnO3 and Nd0.7Sr0.3MnO3 synthesised by sol–gel and solid-state reaction methods |
title_full |
The physical properties of submicron and nano-grained La0.7Sr0.3MnO3 and Nd0.7Sr0.3MnO3 synthesised by sol–gel and solid-state reaction methods |
title_fullStr |
The physical properties of submicron and nano-grained La0.7Sr0.3MnO3 and Nd0.7Sr0.3MnO3 synthesised by sol–gel and solid-state reaction methods |
title_full_unstemmed |
The physical properties of submicron and nano-grained La0.7Sr0.3MnO3 and Nd0.7Sr0.3MnO3 synthesised by sol–gel and solid-state reaction methods |
title_sort |
physical properties of submicron and nano-grained la0.7sr0.3mno3 and nd0.7sr0.3mno3 synthesised by sol–gel and solid-state reaction methods |
publisher |
MDPI AG |
publishDate |
2021 |
url |
http://psasir.upm.edu.my/id/eprint/95558/1/The%20physical%20properties%20of%20submicron%20and%20nano-grained%20la0.7Sr0.3MnO3%20and%20Nd0.7Sr0.3MnO3%20synthesised%20by%20sol%E2%80%93gel%20and%20solid-state%20reaction%20methods.pdf http://psasir.upm.edu.my/id/eprint/95558/ https://www.mdpi.com/2079-6412/11/3/361 |
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13.18916 |