Chemical pressure induced substantial negative exchange bias on zero field cooled nanocrystalline LaFeO3
We report a distinctly different zero feld cooled negative exchange bias(EB) effect in Ni doped LaFeO _3 nanoparticle where the EB field is both temperature and concentration dependent. Nanoparticles of Ni substituted LaFeO _3 is prepared by a sol-gel process. The broadening of diffraction peaks wit...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2020-01-01
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| Series: | Materials Research Express |
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| Online Access: | https://doi.org/10.1088/2053-1591/ab65e4 |
| _version_ | 1797747046496600064 |
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| author | T Lakshmana Rao M K Pradhan Sujay Chakravarty S Dash |
| author_facet | T Lakshmana Rao M K Pradhan Sujay Chakravarty S Dash |
| author_sort | T Lakshmana Rao |
| collection | DOAJ |
| description | We report a distinctly different zero feld cooled negative exchange bias(EB) effect in Ni doped LaFeO _3 nanoparticle where the EB field is both temperature and concentration dependent. Nanoparticles of Ni substituted LaFeO _3 is prepared by a sol-gel process. The broadening of diffraction peaks with Ni is due to the combined effect of octahedral distortion and reduction in particle size while rulling out any structural phase change. A substantial EB is acquired below spin reorientation transitions which further reduces with higher chemical pressure of Ni. EB field is found to be ∼5.71 kOe at 5 K, revealing a large value compared to similar zero field cooled EB systems. A simple model is proposed based on tunable shell-core magnetic phases to explain these unique EB effects. Present study also aimed to explore the spin and oxidation state of Fe vis a vis magnetic ordering in LaFeO _3 together with consequence of Ni doping. |
| first_indexed | 2024-03-12T15:46:31Z |
| format | Article |
| id | doaj.art-ebd4ac14a61048a49a5835ca9b1189bb |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:46:31Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
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| series | Materials Research Express |
| spelling | doaj.art-ebd4ac14a61048a49a5835ca9b1189bb2023-08-09T15:26:32ZengIOP PublishingMaterials Research Express2053-15912020-01-017101610810.1088/2053-1591/ab65e4Chemical pressure induced substantial negative exchange bias on zero field cooled nanocrystalline LaFeO3T Lakshmana Rao0https://orcid.org/0000-0003-1831-1934M K Pradhan1Sujay Chakravarty2S Dash3https://orcid.org/0000-0002-6278-2277Dept. of Physics and Astronomy, National Institute of Technology Rourkela, Rourkela, Odisha 769008, IndiaDept. of Physics and Astronomy, National Institute of Technology Rourkela, Rourkela, Odisha 769008, IndiaUGC-DAE Consortium for Scientific Research, Kalpakkam Node, Kokilamedu 603104, IndiaDept. of Physics and Astronomy, National Institute of Technology Rourkela, Rourkela, Odisha 769008, IndiaWe report a distinctly different zero feld cooled negative exchange bias(EB) effect in Ni doped LaFeO _3 nanoparticle where the EB field is both temperature and concentration dependent. Nanoparticles of Ni substituted LaFeO _3 is prepared by a sol-gel process. The broadening of diffraction peaks with Ni is due to the combined effect of octahedral distortion and reduction in particle size while rulling out any structural phase change. A substantial EB is acquired below spin reorientation transitions which further reduces with higher chemical pressure of Ni. EB field is found to be ∼5.71 kOe at 5 K, revealing a large value compared to similar zero field cooled EB systems. A simple model is proposed based on tunable shell-core magnetic phases to explain these unique EB effects. Present study also aimed to explore the spin and oxidation state of Fe vis a vis magnetic ordering in LaFeO _3 together with consequence of Ni doping.https://doi.org/10.1088/2053-1591/ab65e4lanthanum ferriteexchange biaschemical pressurenanocrystal |
| spellingShingle | T Lakshmana Rao M K Pradhan Sujay Chakravarty S Dash Chemical pressure induced substantial negative exchange bias on zero field cooled nanocrystalline LaFeO3 Materials Research Express lanthanum ferrite exchange bias chemical pressure nanocrystal |
| title | Chemical pressure induced substantial negative exchange bias on zero field cooled nanocrystalline LaFeO3 |
| title_full | Chemical pressure induced substantial negative exchange bias on zero field cooled nanocrystalline LaFeO3 |
| title_fullStr | Chemical pressure induced substantial negative exchange bias on zero field cooled nanocrystalline LaFeO3 |
| title_full_unstemmed | Chemical pressure induced substantial negative exchange bias on zero field cooled nanocrystalline LaFeO3 |
| title_short | Chemical pressure induced substantial negative exchange bias on zero field cooled nanocrystalline LaFeO3 |
| title_sort | chemical pressure induced substantial negative exchange bias on zero field cooled nanocrystalline lafeo3 |
| topic | lanthanum ferrite exchange bias chemical pressure nanocrystal |
| url | https://doi.org/10.1088/2053-1591/ab65e4 |
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