Ye, Xinglong ; Fortunato, Nuno ; Sarkar, Abhishek ; Geßwein, Holger ; Wang, Di ; Chen, Xiang ; Eggert, Benedikt ; Wende, Heiko ; Brand, Richard A. ; Zhang, Hongbin ; Hahn, Horst ; Kruk, Robert (2022)
Creating a Ferromagnetic Ground State with Tc Above Room Temperature in a Paramagnetic Alloy through Non‐Equilibrium Nanostructuring.
In: Advanced Materials, 2022, 34 (11)
doi: 10.26083/tuprints-00021539
Artikel, Zweitveröffentlichung, Verlagsversion
 | Es ist eine neuere Version dieses Eintrags verfügbar. |
Kurzbeschreibung (Abstract)
Materials with strong magnetostructural coupling have complex energy landscapes featuring multiple local ground states, thus making it possible to switch among distinct magnetic‐electronic properties. However, these energy minima are rarely accessible by a mere application of an external stimuli to the system in equilibrium state. A ferromagnetic ground state, with Tc above room temperature, can be created in an initially paramagnetic alloy by nonequilibrium nanostructuring. By a dealloying process, bulk chemically disordered FeRh alloys are transformed into a nanoporous structure with the topology of a few nanometer‐sized ligaments and nodes. Magnetometry and Mössbauer spectroscopy reveal the coexistence of two magnetic ground states, a conventional low‐temperature spin‐glass and a hitherto‐unknown robust ferromagnetic phase. The emergence of the ferromagnetic phase is validated by density functional theory calculations showing that local tetragonal distortion induced by surface stress favors ferromagnetic ordering. The study provides a means for reaching conventionally inaccessible magnetic states, resulting in a complete on/off ferromagnetic–paramagnetic switching over a broad temperature range.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2022 |
| Autor(en): | Ye, Xinglong ; Fortunato, Nuno ; Sarkar, Abhishek ; Geßwein, Holger ; Wang, Di ; Chen, Xiang ; Eggert, Benedikt ; Wende, Heiko ; Brand, Richard A. ; Zhang, Hongbin ; Hahn, Horst ; Kruk, Robert |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | Creating a Ferromagnetic Ground State with Tc Above Room Temperature in a Paramagnetic Alloy through Non‐Equilibrium Nanostructuring |
| Sprache: | Englisch |
| Publikationsjahr: | 2022 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | 2022 |
| Verlag: | Wiley-VCH |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Advanced Materials |
| Jahrgang/Volume einer Zeitschrift: | 34 |
| (Heft-)Nummer: | 11 |
| Kollation: | 11 Seiten |
| DOI: | 10.26083/tuprints-00021539 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/21539 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichung DeepGreen |
| Kurzbeschreibung (Abstract): | Materials with strong magnetostructural coupling have complex energy landscapes featuring multiple local ground states, thus making it possible to switch among distinct magnetic‐electronic properties. However, these energy minima are rarely accessible by a mere application of an external stimuli to the system in equilibrium state. A ferromagnetic ground state, with Tc above room temperature, can be created in an initially paramagnetic alloy by nonequilibrium nanostructuring. By a dealloying process, bulk chemically disordered FeRh alloys are transformed into a nanoporous structure with the topology of a few nanometer‐sized ligaments and nodes. Magnetometry and Mössbauer spectroscopy reveal the coexistence of two magnetic ground states, a conventional low‐temperature spin‐glass and a hitherto‐unknown robust ferromagnetic phase. The emergence of the ferromagnetic phase is validated by density functional theory calculations showing that local tetragonal distortion induced by surface stress favors ferromagnetic ordering. The study provides a means for reaching conventionally inaccessible magnetic states, resulting in a complete on/off ferromagnetic–paramagnetic switching over a broad temperature range. |
| Freie Schlagworte: | FeRh alloys, ferromagnetic materials, magnetostructural coupling, multiple ground states, non‐equilibrium nanostructuring, paramagnetic materials |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-215396 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 540 Chemie 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften und Maschinenbau |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Gemeinschaftslabor Nanomaterialien |
| Hinterlegungsdatum: | 01 Jul 2022 11:40 |
| Letzte Änderung: | 04 Jul 2022 05:17 |
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| Suche nach Titel in: | TUfind oder in Google |
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- Creating a Ferromagnetic Ground State with Tc Above Room Temperature in a Paramagnetic Alloy through Non‐Equilibrium Nanostructuring. (deposited 01 Jul 2022 11:40) [Gegenwärtig angezeigt]
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