Influence of Fe-substitution on structural, magnetic and magnetocaloric properties of Nd2Fe17-Co solid solutions
| العنوان: | Influence of Fe-substitution on structural, magnetic and magnetocaloric properties of Nd2Fe17-Co solid solutions |
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| المؤلفون: | A. Ben Salah, N. Bouchaala, K. Nouri, M. Jemmali, I. Hentech, Lotfi Bessais, T. Bartoli, S. Walha |
| المساهمون: | Laboratoire d'Ingénierie des Systèmes Mécaniques et des MAtériaux (LISMMA), Université Paris 8 Vincennes-Saint-Denis (UP8)-SUPMECA - Institut supérieur de mécanique de Paris (SUPMECA), Faculté des Sciences de Sfax, Université de Sfax - University of Sfax, Chimie métallurgique des terres rares (CMTR), Centre National de la Recherche Scientifique (CNRS), Université de Tunis El Manar (UTM) |
| المصدر: | Journal of Solid State Chemistry Journal of Solid State Chemistry, Elsevier, 2018, 258, pp.501-509. ⟨10.1016/j.jssc.2017.11.011⟩ |
| بيانات النشر: | HAL CCSD, 2018. |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | Materials science, Analytical chemistry, Intermetallic, chemistry.chemical_element, 02 engineering and technology, 01 natural sciences, Inorganic Chemistry, 0103 physical sciences, Materials Chemistry, Magnetic refrigeration, Physical and Theoretical Chemistry, Hyperfine structure, ComputingMilieux_MISCELLANEOUS, Mossbauer spectrometry, 010302 applied physics, [PHYS]Physics [physics], Rietveld refinement, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, chemistry, Ceramics and Composites, Curie temperature, 0210 nano-technology, Cobalt, Solid solution |
| الوصف: | Nd2Fe17−xCox ( x = 0 , 1 , 2 , 3 , 4 ) intermetallic compounds, obtained under arc-melting conditions, have been investigated by means of X-ray diffraction analysis (XRD), Mossbauer spectrometry and magnetic measurements. The Rietveld refinement revealed that the sample is a pure compound with rhombohedral Th2Zn17-type structure ( R 3 ¯ m space group) with the following lattice parameters: a = 8.5792 (2) A, c = 12.4615 (2) A. Using Mossbauer spectrometry analysis coupled with structural consideration we have unambiguously determined the cobalt atoms preferred inequivalent crystallographic site. Nd2Fe17 show an increase of 3.5 T in their weighted average hyperfine fields upon cobalt substitution. Whatever the cobalt content, the hyperfine field of these compounds follow this sequence H hf { 6 c } > H hf { 9 d } > H hf { 18 f } > H hf { 18 h } . The magnetic measurements showed that the Curie temperature increases with the Co content. The magnetic entropy change ( Δ S M ) was estimated from isothermal magnetization curves and it increases from 3.35 J/Kg K for x = 0 to 5.83 J/Kg K for x = 2 at μ 0 H = 1.6 T . The relative cooling power (RCP) is in the range of 11.6 J/kg ( x = 0 ) and 16 J/kg ( x = 2 ). |
| اللغة: | English |
| تدمد: | 0022-4596 1095-726X |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b2cb0668ca00c4434ea99120f0722186 https://hal.archives-ouvertes.fr/hal-02861150 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi.dedup.....b2cb0668ca00c4434ea99120f0722186 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 00224596 1095726X |
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