Zobrazeno 1 - 10 of 13 pro vyhledávání: '"Ma, Oumezzine"'
1
Theoretical Description of the Magnetocaloric Effect With Second-Order Magnetic Phase Transitions in La0.65Ce0.05Sr0.3Mn1−xCuxO3 (x = 0 and x = 0.15) Manganite Using the Bean–Rodbell Model of Magneto–volume Coupling
Autor: Ma. Oumezzine
Publikováno v: Journal of Low Temperature Physics. 203:39-46
In this work, a theoretical description of the second-order magnetic transition as well as the magnetic entropy change of La0.65Ce0.05Sr0.3Mn1−xCuxO3 (x = 0 and x = 0.15) compounds is presented based on the Bean–Rodbell model of magneto–volume
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2e6052f044de23c3cb16682b21501bb5
https://doi.org/10.1007/s10909-020-02559-3
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2
Study of Critical Magnetic Behaviour in Nanocrystalline La0.65Ce0.05Sr0.3Mn1−xCuxO3 (x = 0, x = 0.05 and x = 0.15) Prepared by Pechini Method
Autor: E.K. Hlil, Ma. Oumezzine, A. Fouzri, R. Bellouz, M. Chebaane
Publikováno v: Journal of Superconductivity and Novel Magnetism
Journal of Superconductivity and Novel Magnetism, Springer Verlag, 2021, 34, pp.193-199. ⟨10.1007/s10948-020-05568-1⟩
The critical bahaviour of La0.65Ce0.05Sr0.3Mn1xCuxO3 (x = 0, x = 0.05 and x = 0.15) manganite prepared by the sol–gel-based Pechini method has been investigated by measuring the magnetization around the Curie temperature, TC. The obtained critical
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e9322e91c0ffd3dc2d4faf496ce84dbd
https://doi.org/10.1007/s10948-020-05568-1
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3
Critical Exponent Analysis and Evidence of Long-Range Ferromagnetic Order in Lightly Pr-Doped Nanocrystalline (La1-xPrx)0.67Ba0.33MnO3 (x = 0.15 and 0.22) Manganites
Autor: E.K. Hlil, Ma. Oumezzine
Publikováno v: Journal of Low Temperature Physics
Journal of Low Temperature Physics, Springer Verlag (Germany), 2020, 201 (3-4), pp.406-417. ⟨10.1007/s10909-020-02505-3⟩
We investigate the effect of lightly Pr3+ doping ions on the critical behavior of (La1-xPrx)0.67Ba0.33MnO3 (x = 0.15–0.22) perovskite synthesized by the modified sol–gel Pechini method. The obtained critical exponents (beta, gamma and delta) have
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2d23695f3ece25cf05c48e955046938c
https://doi.org/10.1007/s10909-020-02505-3
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5
Copper-doped lanthanum manganite La0.65Ce0.05Sr0.3Mn1−xCuxO3 influence on structural, magnetic and magnetocaloric effects
Autor: E.K. Hlil, A. Fouzri, Ma. Oumezzine, R. Bellouz, M. Chebaane
Publikováno v: RSC Advances
RSC Advances, Royal Society of Chemistry, 2018, 8 (13), pp.7186-7195. ⟨10.1039/C7RA13244A⟩
Bulk nanocrystalline samples of La0.65Ce0.05Sr0.3Mn1−xCuxO3 (0 ≤ x ≤ 0.15) manganites are prepared by the sol–gel based Pechini method. The effect of the substitution for Mn with Cu upon the structural and magnetic properties has been investi
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::06aa691c46cf4e30620bfc232fbe25e0
https://doi.org/10.1039/c7ra13244a
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6
Pr 3+ doping at the A-site of La 0.67 Ba 0.33 MnO 3 nanocrystalline material: assessment of the relationship between structural and physical properties and Bean–Rodbell model simulation of disorder effects
Autor: Ma. Oumezzine, Herbet B. Sales, Ahmed Selmi, E.K. Hlil
Publikováno v: RSC Advances
RSC Advances, Royal Society of Chemistry, 2019, 9 (44), pp.25627-25637. ⟨10.1039/C9RA03494C⟩
Bulk nanocrystalline samples of (La1−xPrx)0.67Ba0.33MnO3 (0.075 ≤ x ≤ 0.30) manganites with a fixed carrier concentration are prepared by the sol–gel based Pechini method. Rietveld refinement of the X-ray diffraction patterns, shows the forma
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b4d77396da508586fa1faba5b57a0ddf
https://hal.archives-ouvertes.fr/hal-02266701
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9
Critical phenomena and estimation of the spontaneous magnetization from a mean field analysis of the magnetic entropy change in La0.65Eu0.05Sr0.3Mn0.95Cr0.05O3
Autor: E.K. Hlil, R. Bellouz, Ma. Oumezzine
Publikováno v: Materials Research Bulletin
Materials Research Bulletin, Elsevier, 2016, 74, pp.452-458. ⟨10.1016/j.materresbull.2015.11.015⟩
We have studied the magnetic and magnetocaloric properties of the La0.65Eu0.05Sr0.3Mn0.95Cr0.05O3 manganite prepared by using a soft chemical method (Pechini method). This compound presents a single magnetic transition from ferromagnetic (FM) to para
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4a5fda9a7d056d48b9ebcdfd479ba8cd
https://hal.archives-ouvertes.fr/hal-01902220
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10
Room temperature magnetic and magnetocaloric properties of La0.67Ba0.33Mn0.98Ti0.02O3 perovskite
Autor: Ma. Oumezzine, Sadok Zemni, Octavio Peña
Publikováno v: Journal of Alloys and Compounds
Journal of Alloys and Compounds, 2010, 508 (2), pp.292-296. ⟨10.1016/j.jallcom.2010.08.145⟩
Journal of Alloys and Compounds, Elsevier, 2010, 508 (2), pp.292-296. ⟨10.1016/j.jallcom.2010.08.145⟩
The influence of Ti-doping on the magnetic and magnetocaloric properties of La 0.67 Ba 0.33 Mn 0.98 Ti 0.02 O 3 perovskite is investigated. La 0.67 Ba 0.33 Mn 0.98 Ti 0.02 O 3 sample was prepared by ceramic route at 1400 °C. It is a cubic Pm–3m si
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c753ad7da9579ccc7419e1b1fab0572e
https://doi.org/10.1016/j.jallcom.2010.08.145
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