Low-Temperature Magnetic and Magnetocaloric Properties of Manganese-Substituted Gd<sub>0.5</sub>Er<sub>0.5</sub>CrO<sub>3</sub> Orthochromites
Rare-earth chromites have been envisioned to replace gas-based refrigeration technology because of their promising magnetocaloric properties at low temperatures, especially in the liquid helium temperature range. Here, we report the low-temperature magnetic and magnetocaloric properties of Gd<sub...
| Published in: | Crystals |
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MDPI AG
2022-02-01
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| Online Access: | https://www.mdpi.com/2073-4352/12/2/263 |
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| author | Neeraj Panwar Kuldeep Singh Komal Kanwar Yugandhar Bitla Surendra Kumar Venkata Sreenivas Puli |
| author_facet | Neeraj Panwar Kuldeep Singh Komal Kanwar Yugandhar Bitla Surendra Kumar Venkata Sreenivas Puli |
| author_sort | Neeraj Panwar |
| collection | DOAJ |
| container_title | Crystals |
| description | Rare-earth chromites have been envisioned to replace gas-based refrigeration technology because of their promising magnetocaloric properties at low temperatures, especially in the liquid helium temperature range. Here, we report the low-temperature magnetic and magnetocaloric properties of Gd<sub>0.5</sub>Er<sub>0.5</sub>Cr<sub>1−x</sub>Mn<sub>x</sub>O<sub>3</sub> (<i>x</i> = 0, 0.1, 0.2, 0.3, 0.4 and 0.5) rare-earth orthochromites. The Néel transition temperature (<i>T<sub>N</sub></i>) was suppressed from 144 K for Gd<sub>0.5</sub>Er<sub>0.5</sub>CrO<sub>3</sub> to 66 K for the Gd<sub>0.5</sub>Er<sub>0.5</sub>Cr<sub>0.5</sub>Mn<sub>0.5</sub>O<sub>3</sub> compound. Furthermore, magnetization reversal was observed in the magnetization versus temperature behavior of the Gd<sub>0.5</sub>Er<sub>0.5</sub>Cr<sub>0.6</sub>Mn<sub>0.4</sub>O<sub>3</sub> and Gd<sub>0.5</sub>Er<sub>0.5</sub>Cr<sub>0.5</sub>Mn<sub>0.5</sub>O<sub>3</sub> compounds at 100 Oe applied magnetic field. The magnetic entropy change (−∆S) value varied from 16.74 J/kg-K to 7.46 J/kg-K, whereas the relative cooling power (RCP) ranged from 375.94 J/kg to 220.22 J/kg with a Mn ion concentration at 5 T field and around 7.5 K temperature. The experimental results were substantiated by a theoretical model. The present values of the magnetocaloric effect are higher than those of many undoped chromites, manganites and molecular magnets in the liquid helium temperature range. |
| format | Article |
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| institution | Directory of Open Access Journals |
| issn | 2073-4352 |
| language | English |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
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| spelling | doaj-art-73013ee5674f461b9531f514b06547cc2025-08-19T22:25:30ZengMDPI AGCrystals2073-43522022-02-0112226310.3390/cryst12020263Low-Temperature Magnetic and Magnetocaloric Properties of Manganese-Substituted Gd<sub>0.5</sub>Er<sub>0.5</sub>CrO<sub>3</sub> OrthochromitesNeeraj Panwar0Kuldeep Singh1Komal Kanwar2Yugandhar Bitla3Surendra Kumar4Venkata Sreenivas Puli5Department of Physics, Central University of Rajasthan Bandarsindri, Ajmer 305817, Rajasthan, IndiaDepartment of Physics, Central University of Rajasthan Bandarsindri, Ajmer 305817, Rajasthan, IndiaDepartment of Physics, Central University of Rajasthan Bandarsindri, Ajmer 305817, Rajasthan, IndiaDepartment of Physics, Central University of Rajasthan Bandarsindri, Ajmer 305817, Rajasthan, IndiaDepartment of Physics, Sri Venkateswara College, University of Delhi, Dhaula Kuan, New Delhi 110021, Delhi, IndiaNational Research Council, Washington, DC 20001, USARare-earth chromites have been envisioned to replace gas-based refrigeration technology because of their promising magnetocaloric properties at low temperatures, especially in the liquid helium temperature range. Here, we report the low-temperature magnetic and magnetocaloric properties of Gd<sub>0.5</sub>Er<sub>0.5</sub>Cr<sub>1−x</sub>Mn<sub>x</sub>O<sub>3</sub> (<i>x</i> = 0, 0.1, 0.2, 0.3, 0.4 and 0.5) rare-earth orthochromites. The Néel transition temperature (<i>T<sub>N</sub></i>) was suppressed from 144 K for Gd<sub>0.5</sub>Er<sub>0.5</sub>CrO<sub>3</sub> to 66 K for the Gd<sub>0.5</sub>Er<sub>0.5</sub>Cr<sub>0.5</sub>Mn<sub>0.5</sub>O<sub>3</sub> compound. Furthermore, magnetization reversal was observed in the magnetization versus temperature behavior of the Gd<sub>0.5</sub>Er<sub>0.5</sub>Cr<sub>0.6</sub>Mn<sub>0.4</sub>O<sub>3</sub> and Gd<sub>0.5</sub>Er<sub>0.5</sub>Cr<sub>0.5</sub>Mn<sub>0.5</sub>O<sub>3</sub> compounds at 100 Oe applied magnetic field. The magnetic entropy change (−∆S) value varied from 16.74 J/kg-K to 7.46 J/kg-K, whereas the relative cooling power (RCP) ranged from 375.94 J/kg to 220.22 J/kg with a Mn ion concentration at 5 T field and around 7.5 K temperature. The experimental results were substantiated by a theoretical model. The present values of the magnetocaloric effect are higher than those of many undoped chromites, manganites and molecular magnets in the liquid helium temperature range.https://www.mdpi.com/2073-4352/12/2/263rare-earth orthochromitesmagnetization reversalmagnetocaloric effect |
| spellingShingle | Neeraj Panwar Kuldeep Singh Komal Kanwar Yugandhar Bitla Surendra Kumar Venkata Sreenivas Puli Low-Temperature Magnetic and Magnetocaloric Properties of Manganese-Substituted Gd<sub>0.5</sub>Er<sub>0.5</sub>CrO<sub>3</sub> Orthochromites rare-earth orthochromites magnetization reversal magnetocaloric effect |
| title | Low-Temperature Magnetic and Magnetocaloric Properties of Manganese-Substituted Gd<sub>0.5</sub>Er<sub>0.5</sub>CrO<sub>3</sub> Orthochromites |
| title_full | Low-Temperature Magnetic and Magnetocaloric Properties of Manganese-Substituted Gd<sub>0.5</sub>Er<sub>0.5</sub>CrO<sub>3</sub> Orthochromites |
| title_fullStr | Low-Temperature Magnetic and Magnetocaloric Properties of Manganese-Substituted Gd<sub>0.5</sub>Er<sub>0.5</sub>CrO<sub>3</sub> Orthochromites |
| title_full_unstemmed | Low-Temperature Magnetic and Magnetocaloric Properties of Manganese-Substituted Gd<sub>0.5</sub>Er<sub>0.5</sub>CrO<sub>3</sub> Orthochromites |
| title_short | Low-Temperature Magnetic and Magnetocaloric Properties of Manganese-Substituted Gd<sub>0.5</sub>Er<sub>0.5</sub>CrO<sub>3</sub> Orthochromites |
| title_sort | low temperature magnetic and magnetocaloric properties of manganese substituted gd sub 0 5 sub er sub 0 5 sub cro sub 3 sub orthochromites |
| topic | rare-earth orthochromites magnetization reversal magnetocaloric effect |
| url | https://www.mdpi.com/2073-4352/12/2/263 |
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