Controlling magnetostructural transition and magnetocaloric effect in multi-component transition-metal-based materials
Proper coupling between structural and magnetic transitions is critical for the emergence and control of magnetocaloric effects in solids. We examine the influence of minor substitutional doping (replacing Mn by Cr and Al by Sn) and interstitial doping with B on the magnetic, structural, and magneto...
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| Veröffentlicht in: | Journal of applied physics 2021-05, Vol.129 (19) |
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| container_title | Journal of applied physics |
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| creator | Biswas, Anis Zarkevich, N. A. Mudryk, Y. Pathak, Arjun K. Smirnov, A. V. Balema, V. P. Johnson, Duane D. Pecharsky, V. K. |
| description | Proper coupling between structural and magnetic transitions is critical for the emergence and control of magnetocaloric effects in solids. We examine the influence of minor substitutional doping (replacing Mn by Cr and Al by Sn) and interstitial doping with B on the magnetic, structural, and magnetocaloric properties of recently discovered Mn0.5Fe0.5NiSi0.94Al0.06 alloy exhibiting a giant magnetocaloric effect near room temperature. We demonstrate that magnetocaloric properties of the base compound can be controlled and, in some cases, improved by chemical substitutions. First-principles computations elucidate how small changes in the composition affect properties in this family of compounds and, thus, provide useful guidance for the selection of suitable doping elements for such materials. Here the magnetic-field-induced entropy change measured for Mn0.5Fe0.5NiSi0.94Al0.06B0.005 is –22 J/kg K near room temperature for the applied magnetic field of 2 T, and it is among the highest known values for this class of materials. |
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We demonstrate that magnetocaloric properties of the base compound can be controlled and, in some cases, improved by chemical substitutions. First-principles computations elucidate how small changes in the composition affect properties in this family of compounds and, thus, provide useful guidance for the selection of suitable doping elements for such materials. 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| source | AIP Journals Complete; Alma/SFX Local Collection |
| subjects | Calorimetry Crystal structure Crystallography Density functional theory Magnetism MATERIALS SCIENCE Phase transitions X-ray diffraction |
| title | Controlling magnetostructural transition and magnetocaloric effect in multi-component transition-metal-based materials |
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