Magnetic phase transitions and magnetocaloric effect in DyCrTiO5 nanoparticles
This work focuses on the transitions found in magnetic measurements of DyCrTiO5 nanoparticles with the associated magnetocaloric behavior. The nanoparticles have been synthesized through a fast and easy synthesis technique i.e., sol-gel method and then calcined at 800 °C. The orthorhombic structure...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2023-02-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/9.0000552 |
| _version_ | 1811154927125266432 |
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| author | Bharati Bamana Aletta Prinsloo Pankaj Mohanty Charles Sheppard |
| author_facet | Bharati Bamana Aletta Prinsloo Pankaj Mohanty Charles Sheppard |
| author_sort | Bharati Bamana |
| collection | DOAJ |
| description | This work focuses on the transitions found in magnetic measurements of DyCrTiO5 nanoparticles with the associated magnetocaloric behavior. The nanoparticles have been synthesized through a fast and easy synthesis technique i.e., sol-gel method and then calcined at 800 °C. The orthorhombic structure of the material with lattice constants, a, b, and c are of 7.3158(7), 8.6431(9), 5.8390(8) Å, respectively, was established from the x-ray diffraction pattern. The transmission electron microscopy result confirms the 37 ± 1 nm particle size of the synthesised sample. The Néel temperature, TN = 153 ± 1 K, was obtained from the magnetic measurement in which magnetization (M) was measured with increasing the temperature (T). In addition, spin reorientation is observed at a temperature TSR = 49 ± 1 K. Irreversibility is seen in the field-cool-cooling curves and field-cool-warming curves of M(T) measurements at low temperatures, not previously observed in bulk samples of this material. The ferromagnetic nature, with the exchange bias effect, is confirmed for the sample from the magnetization measurements at constant temperature by varying the applied field. Additionally, a change in magnetic entropy (−ΔSm) of 10.9 ± 0.1 J kg−1 K−1 is found at a 3 T difference in the field. The obtained magnetic behavior of DyCrTiO5 nanoparticles is discussed in terms of the competing interactions of Cr3+ and Dy3+, respectively. |
| first_indexed | 2024-04-10T04:24:17Z |
| format | Article |
| id | doaj.art-cf8ef6dd3fe5420fa4f881bfafc41b6c |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-04-10T04:24:17Z |
| publishDate | 2023-02-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-cf8ef6dd3fe5420fa4f881bfafc41b6c2023-03-10T17:26:20ZengAIP Publishing LLCAIP Advances2158-32262023-02-01132025049025049-610.1063/9.0000552Magnetic phase transitions and magnetocaloric effect in DyCrTiO5 nanoparticlesBharati Bamana0Aletta Prinsloo1Pankaj Mohanty2Charles Sheppard3Cr Research Group, Department of Physics, University of Johannesburg, P. O. Box 524, Auckland Park, Johannesburg 2006, South AfricaCr Research Group, Department of Physics, University of Johannesburg, P. O. Box 524, Auckland Park, Johannesburg 2006, South AfricaCr Research Group, Department of Physics, University of Johannesburg, P. O. Box 524, Auckland Park, Johannesburg 2006, South AfricaCr Research Group, Department of Physics, University of Johannesburg, P. O. Box 524, Auckland Park, Johannesburg 2006, South AfricaThis work focuses on the transitions found in magnetic measurements of DyCrTiO5 nanoparticles with the associated magnetocaloric behavior. The nanoparticles have been synthesized through a fast and easy synthesis technique i.e., sol-gel method and then calcined at 800 °C. The orthorhombic structure of the material with lattice constants, a, b, and c are of 7.3158(7), 8.6431(9), 5.8390(8) Å, respectively, was established from the x-ray diffraction pattern. The transmission electron microscopy result confirms the 37 ± 1 nm particle size of the synthesised sample. The Néel temperature, TN = 153 ± 1 K, was obtained from the magnetic measurement in which magnetization (M) was measured with increasing the temperature (T). In addition, spin reorientation is observed at a temperature TSR = 49 ± 1 K. Irreversibility is seen in the field-cool-cooling curves and field-cool-warming curves of M(T) measurements at low temperatures, not previously observed in bulk samples of this material. The ferromagnetic nature, with the exchange bias effect, is confirmed for the sample from the magnetization measurements at constant temperature by varying the applied field. Additionally, a change in magnetic entropy (−ΔSm) of 10.9 ± 0.1 J kg−1 K−1 is found at a 3 T difference in the field. The obtained magnetic behavior of DyCrTiO5 nanoparticles is discussed in terms of the competing interactions of Cr3+ and Dy3+, respectively.http://dx.doi.org/10.1063/9.0000552 |
| spellingShingle | Bharati Bamana Aletta Prinsloo Pankaj Mohanty Charles Sheppard Magnetic phase transitions and magnetocaloric effect in DyCrTiO5 nanoparticles AIP Advances |
| title | Magnetic phase transitions and magnetocaloric effect in DyCrTiO5 nanoparticles |
| title_full | Magnetic phase transitions and magnetocaloric effect in DyCrTiO5 nanoparticles |
| title_fullStr | Magnetic phase transitions and magnetocaloric effect in DyCrTiO5 nanoparticles |
| title_full_unstemmed | Magnetic phase transitions and magnetocaloric effect in DyCrTiO5 nanoparticles |
| title_short | Magnetic phase transitions and magnetocaloric effect in DyCrTiO5 nanoparticles |
| title_sort | magnetic phase transitions and magnetocaloric effect in dycrtio5 nanoparticles |
| url | http://dx.doi.org/10.1063/9.0000552 |
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