Tahir, Shabbir ; Landers, Joachim ; Salamon, Soma ; Koch, David ; Doñate‐Buendía, Carlos ; Ziefuß, Anna R. ; Wende, Heiko ; Gökce, Bilal (2024)
Development of Magnetocaloric Microstructures from Equiatomic Iron–Rhodium Nanoparticles through Laser Sintering.
In: Advanced Engineering Materials, 2023, 25 (20)
doi: 10.26083/tuprints-00027254
Artikel, Zweitveröffentlichung, Verlagsversion
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Kurzbeschreibung (Abstract)
Pronounced magnetocaloric effects are typically observed in materials that often contain expensive and rare elements and are therefore costly to mass produce. However, they can rather be exploited on a small scale for miniaturized devices such as magnetic micro coolers, thermal sensors, and magnetic micropumps. Herein, a method is developed to generate magnetocaloric microstructures from an equiatomic iron–rhodium (FeRh) bulk target through a stepwise process. First, paramagnetic near‐to‐equiatomic solid‐solution FeRh nanoparticles (NPs) are generated through picosecond (ps)‐pulsed laser ablation in ethanol, which are then transformed into a printable ink and patterned using a continuous wave laser. Laser patterning not only leads to sintering of the NP ink but also triggers the phase transformation of the initial γ‐ to B2‐FeRh. At a laser fluence of 246 J cm⁻², a partial (52%) phase transformation from γ‐ to B2‐FeRh is obtained, resulting in a magnetization increase of 35 Am² kg⁻¹ across the antiferromagnetic to ferromagnetic phase transition. This represents a ca. sixfold enhancement compared to previous furnace‐annealed FeRh ink. Finally, herein, the ability is demonstrated to create FeRh 2D structures with different geometries using laser sintering of magnetocaloric inks, which offers advantages such as micrometric spatial resolution, in situ annealing, and structure design flexibility.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2024 |
| Autor(en): | Tahir, Shabbir ; Landers, Joachim ; Salamon, Soma ; Koch, David ; Doñate‐Buendía, Carlos ; Ziefuß, Anna R. ; Wende, Heiko ; Gökce, Bilal |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | Development of Magnetocaloric Microstructures from Equiatomic Iron–Rhodium Nanoparticles through Laser Sintering |
| Sprache: | Englisch |
| Publikationsjahr: | 21 Mai 2024 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | Oktober 2023 |
| Ort der Erstveröffentlichung: | Weinheim |
| Verlag: | Wiley-VCH |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Advanced Engineering Materials |
| Jahrgang/Volume einer Zeitschrift: | 25 |
| (Heft-)Nummer: | 20 |
| Kollation: | 10 Seiten |
| DOI: | 10.26083/tuprints-00027254 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/27254 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichung DeepGreen |
| Kurzbeschreibung (Abstract): | Pronounced magnetocaloric effects are typically observed in materials that often contain expensive and rare elements and are therefore costly to mass produce. However, they can rather be exploited on a small scale for miniaturized devices such as magnetic micro coolers, thermal sensors, and magnetic micropumps. Herein, a method is developed to generate magnetocaloric microstructures from an equiatomic iron–rhodium (FeRh) bulk target through a stepwise process. First, paramagnetic near‐to‐equiatomic solid‐solution FeRh nanoparticles (NPs) are generated through picosecond (ps)‐pulsed laser ablation in ethanol, which are then transformed into a printable ink and patterned using a continuous wave laser. Laser patterning not only leads to sintering of the NP ink but also triggers the phase transformation of the initial γ‐ to B2‐FeRh. At a laser fluence of 246 J cm⁻², a partial (52%) phase transformation from γ‐ to B2‐FeRh is obtained, resulting in a magnetization increase of 35 Am² kg⁻¹ across the antiferromagnetic to ferromagnetic phase transition. This represents a ca. sixfold enhancement compared to previous furnace‐annealed FeRh ink. Finally, herein, the ability is demonstrated to create FeRh 2D structures with different geometries using laser sintering of magnetocaloric inks, which offers advantages such as micrometric spatial resolution, in situ annealing, and structure design flexibility. |
| Freie Schlagworte: | antiferromagnetic-ferromagnetic phase transition, iron-rhodium, laser ablation in liquid, laser sintering, micro cooling |
| ID-Nummer: | Artikel-ID: 2300245 |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-272545 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 540 Chemie 600 Technik, Medizin, angewandte Wissenschaften > 660 Technische Chemie |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Strukturforschung |
| Hinterlegungsdatum: | 21 Mai 2024 13:41 |
| Letzte Änderung: | 22 Mai 2024 05:41 |
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| Suche nach Titel in: | TUfind oder in Google |
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- Development of Magnetocaloric Microstructures from Equiatomic Iron–Rhodium Nanoparticles through Laser Sintering. (deposited 21 Mai 2024 13:41) [Gegenwärtig angezeigt]
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