Effect of Small Fe Content on the Structure, Magnetic and Magnetocaloric Properties of SmNi3−x Fe x (x = 0; 0.3 and 0.8) Intermetallic Compounds
| العنوان: | Effect of Small Fe Content on the Structure, Magnetic and Magnetocaloric Properties of SmNi3−x Fe x (x = 0; 0.3 and 0.8) Intermetallic Compounds |
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| المؤلفون: | E. Dhahri, Lotfi Bessais, M. Jemmali, S. Walha, A. Benali, A. Ben Salah, K. Nouri |
| المساهمون: | Faculté des Sciences de Sfax, Université de Sfax - University of Sfax, Université de Tunis El Manar (UTM), Laboratoire de Physique Appliquée, Chimie métallurgique des terres rares (CMTR), Centre National de la Recherche Scientifique (CNRS) |
| المصدر: | Journal of Superconductivity and Novel Magnetism Journal of Superconductivity and Novel Magnetism, Springer Verlag, 2018, 31 (2), pp.511-520. ⟨10.1007/s10948-017-4208-0⟩ |
| بيانات النشر: | HAL CCSD, 2018. |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | 010302 applied physics, [PHYS]Physics [physics], Materials science, Condensed matter physics, Rietveld refinement, Analytical chemistry, Intermetallic, chemistry.chemical_element, 02 engineering and technology, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Electronic, Optical and Magnetic Materials, Magnetization, Nickel, chemistry, 0103 physical sciences, Magnetic refrigeration, Curie temperature, 0210 nano-technology, Critical exponent, Arrott plot, ComputingMilieux_MISCELLANEOUS |
| الوصف: | The SmNi3−x Fe x (x = 0; 0.3 and 0.8) were synthesized by arc melting and annealed at 1073 K for 1 week. The Rietveld refinement showed that these compounds crystallize in the PuNi3-type structure ( $R\bar 3m$ -Space group) and the substitution of nickel by iron leads to an increase of the unit cell volume. The Curie temperature (T C ) of the SmNi3−x Fe x (x = 0; 0.3 and 0.8) samples increases from 60 K for SmNi3 to 230 K for SmNi2.2Fe0.8, the enhancement of T C is ruled by electronic and magnetovolumic effects. All the samples exhibit a second-order magnetic phase transition at Curie temperature T C . The magnetic entropy change ΔS M was estimated from isothermal magnetization curves and it decreases with the increase of Fe content from 2.3 J/kg.K (x = 0) to 0.6 J/kg.K (x = 0.8) at 50 kOe. The critical properties of SmNi2.7Fe0.3 (as an example) intermetallic compound at the ferromagnetic-paramagnetic (FM-PM) transition have been analyzed. The estimated critical exponents derived from the magnetic data using various methods such as modified Arrott plot, Kouvel-Fisher method and critical magnetization isotherms M(T C , H). The critical exponent values for the material are in a close agreement with those predicted for the mean-field theory. The reason for this behavior may be long-range interactions between spins in this system. |
| اللغة: | English |
| تدمد: | 1557-1939 1557-1947 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d0a7686b71ae8d28d2030b736088cae3 https://hal.archives-ouvertes.fr/hal-02861152 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi.dedup.....d0a7686b71ae8d28d2030b736088cae3 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 15571939 15571947 |
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