دورية أكاديمية
Effect of Gd polarization on the large magnetocaloric effect of GdCrO4 in a broad temperature range
| العنوان: | Effect of Gd polarization on the large magnetocaloric effect of GdCrO4 in a broad temperature range |
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| المؤلفون: | Palacios, E., Tomasi, C., Sáez-Puche, R., Dos Santos-García, A.J., Fernández-Martínez, F., Burriel, R. |
| سنة النشر: | 2016 |
| المجموعة: | Digital Repository of University of Zaragoza (ZAGUAN) |
| الوصف: | The ferromagnetic zircon-type phase of GdCrO4 presents high values for the magnetocaloric (MC) parameters. This compound has large isothermal entropy changes ¿ST under the magnetic field action in a wide temperature range, from 5 to 35 K, reaching a maximum |¿ST|=29.0±0.1J/kgK at 22 K, for a field increment ¿B=9 T. It orders ferromagnetically at TC=21.3K via the Cr-Cr exchange interaction and shows a second transition at 4.8 K due to the ordering of the Gd sublattice. The large MC effect is enhanced by the polarization of the Gd3+ ions by the Cr5+ ones via a weaker Gd-Cr interaction. This effect is an interesting feature to be considered in the search for new compounds with a high MC effect in the range of liquid hydrogen or natural gas, regarding the liquefaction of gases by magnetization-demagnetization cycles. This paper contains experimental measurements of magnetization, heat capacity, and direct determinations of the MC effect. The magnetic contribution to the heat capacity Cm has been obtained after subtracting the lattice component. Approximate values for the exchange constants J1 (Cr-Cr) and J3 (Gd-Cr) have been deduced from Cm. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| العلاقة: | info:eu-repo/grantAgreement/ES/MINECO/MAT2013-44063-R; info:eu-repo/grantAgreement/ES/DGA/E100; http://zaguan.unizar.es/record/48376Test |
| DOI: | 10.1103/PhysRevB.93.064420 |
| الإتاحة: | https://doi.org/10.1103/PhysRevB.93.064420Test http://zaguan.unizar.es/record/48376Test |
| حقوق: | by-nc ; http://creativecommons.org/licenses/by-nc/3.0/esTest/ |
| رقم الانضمام: | edsbas.F64BB773 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1103/PhysRevB.93.064420 |
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