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Träfflista för sökning "WFRF:(Moubah Reda) srt2:(2021)"

Sökning: WFRF:(Moubah Reda) > (2021)

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1.
  • Alouhmy, M., et al. (författare)
  • Effects of hydrogen implantation on the magnetocaloric properties of amorphous FeZr films
  • 2021
  • Ingår i: Vacuum. - : Elsevier. - 0042-207X .- 1879-2715. ; 186
  • Tidskriftsartikel (refereegranskat)abstract
    • We report on the effects of H-implantation on the magnetic and magnetocaloric properties of amorphous FeZr films. Arrott plots reveal a second order ferromagnetic to paramagnetic phase transition for the as-grown and H-implanted films, with an increase in T-C from 160 to 200 K upon implantation. The maximum change in magnetic entropy (-Delta S-M) increases from 0.66 to 0.77J/kgK for a field change mu 0 Delta H = 1.5T, as well as the relative cooling power (RCP) values were improved from 84.5 to 108.6J/kg. This improvement was attributed to the increase in magnetization and chemical inhomogeneity induced by the implantation process. The increase in the chemical inhomogeneity was supported by the determination of the local exponent n extracted from the slope of Ln(-Delta S-M) as a function of Ln(mu 0H), which is line with the simulated depth profile of hydrogen atoms through the FeZr film.
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2.
  • Alouhmy, M., et al. (författare)
  • Random magnetic anisotropy approach in amorphous Fe88.4Zr11.6 films : Effects of hydrogen implantation
  • 2021
  • Ingår i: Journal of Non-Crystalline Solids. - : Elsevier. - 0022-3093 .- 1873-4812. ; 566
  • Tidskriftsartikel (refereegranskat)abstract
    • The effects of hydrogen implantation on the magnetic properties in amorphous Fe88.4Zr11.6Hx films with different hydrogen contents (0≤ x≤16) were investigated. The Curie temperature increases with increasing hydrogen content while the coercivity presents an important decrease upon H implantation. Based on the analysis of the approach to saturation in magnetization, the local random anisotropy constant KL was extracted. The local random anisotropy constant decreases from 1.468 MJ/m3 to 0.667 MJ/m3 when the concentration of H increases from 0 to 16%. The ferromagnetic correlation length was found to significantly increase with increasing hydrogen content. The local anisotropy was also extracted from the coercivity based on the Alben and Becker theory, which fits reasonably with that obtained using random magnetic anisotropy approach.
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  • Resultat 1-2 av 2
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tidskriftsartikel (2)
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refereegranskat (2)
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Alouhmy, M. (2)
Moubah, Reda (2)
Abid, M. (2)
Lassri, H. (2)
Alouhmy, G. (1)
Yamkane, Z. (1)
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Uppsala universitet (2)
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Engelska (2)
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Naturvetenskap (2)
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2021 (2)Ta bort avgränsningen

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