Zhao, Zhibo ; Jaiswal, Arun Kumar ; Wang, Di ; Wollersen, Vanessa ; Xiao, Zhengyu ; Pradhan, Gajanan ; Celegato, Federica ; Tiberto, Paola ; Szymczak, Maria ; Dabrowa, Juliusz ; Waqar, Moaz ; Fuchs, Dirk ; Pan, Xiaoqing ; Hahn, Horst ; Kruk, Robert ; Sarkar, Abhishek (2023)
Strain‐driven bidirectional spin orientation control in epitaxial high entropy oxide films.
In: Advanced Science, 10 (27)
doi: 10.1002/advs.202304038
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
High entropy oxides (HEOs), based on the incorporation of multiple‐principal cations into the crystal lattice, offer the possibility to explore previously inaccessible oxide compositions and unconventional properties. Here it is demonstrated that despite the chemical complexity of HEOs external stimuli, such as epitaxial strain, can selectively stabilize certain magneto‐electronic states. Epitaxial (Co₀.₂Cr₀.₂Fe₀.₂Mn₀.₂Ni₀.₂)₃O₄‐HEO thin films are grown in three different strain states: tensile, compressive, and relaxed. A unique coexistence of rocksalt and spinel‐HEO phases, which are fully coherent with no detectable chemical segregation, is revealed by transmission electron microscopy. This dual‐phase coexistence appears as a universal phenomenon in (Co₀.₂Cr₀.₂Fe₀.₂Mn₀.₂Ni₀.₂)₃O₄ epitaxial films. Prominent changes in the magnetic anisotropy and domain structure highlight the strain‐induced bidirectional control of magnetic properties in HEOs. When the films are relaxed, their magnetization behavior is isotropic, similar to that of bulk materials. However, under tensile strain, the hardness of the out‐of‐plane (OOP) axis increases significantly. On the other hand, compressive straining results in an easy OOP magnetization and a maze‐like magnetic domain structure, indicating the perpendicular magnetic anisotropy. Generally, this study emphasizes the adaptability of the high entropy design strategy, which, when combined with coherent strain engineering, opens additional prospects for fine‐tuning properties in oxides.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2023 |
| Autor(en): | Zhao, Zhibo ; Jaiswal, Arun Kumar ; Wang, Di ; Wollersen, Vanessa ; Xiao, Zhengyu ; Pradhan, Gajanan ; Celegato, Federica ; Tiberto, Paola ; Szymczak, Maria ; Dabrowa, Juliusz ; Waqar, Moaz ; Fuchs, Dirk ; Pan, Xiaoqing ; Hahn, Horst ; Kruk, Robert ; Sarkar, Abhishek |
| Art des Eintrags: | Bibliographie |
| Titel: | Strain‐driven bidirectional spin orientation control in epitaxial high entropy oxide films |
| Sprache: | Englisch |
| Publikationsjahr: | 2023 |
| Ort: | Weinheim |
| Verlag: | Wiley-VCH |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Advanced Science |
| Jahrgang/Volume einer Zeitschrift: | 10 |
| (Heft-)Nummer: | 27 |
| Kollation: | 10 Seiten |
| DOI: | 10.1002/advs.202304038 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | High entropy oxides (HEOs), based on the incorporation of multiple‐principal cations into the crystal lattice, offer the possibility to explore previously inaccessible oxide compositions and unconventional properties. Here it is demonstrated that despite the chemical complexity of HEOs external stimuli, such as epitaxial strain, can selectively stabilize certain magneto‐electronic states. Epitaxial (Co₀.₂Cr₀.₂Fe₀.₂Mn₀.₂Ni₀.₂)₃O₄‐HEO thin films are grown in three different strain states: tensile, compressive, and relaxed. A unique coexistence of rocksalt and spinel‐HEO phases, which are fully coherent with no detectable chemical segregation, is revealed by transmission electron microscopy. This dual‐phase coexistence appears as a universal phenomenon in (Co₀.₂Cr₀.₂Fe₀.₂Mn₀.₂Ni₀.₂)₃O₄ epitaxial films. Prominent changes in the magnetic anisotropy and domain structure highlight the strain‐induced bidirectional control of magnetic properties in HEOs. When the films are relaxed, their magnetization behavior is isotropic, similar to that of bulk materials. However, under tensile strain, the hardness of the out‐of‐plane (OOP) axis increases significantly. On the other hand, compressive straining results in an easy OOP magnetization and a maze‐like magnetic domain structure, indicating the perpendicular magnetic anisotropy. Generally, this study emphasizes the adaptability of the high entropy design strategy, which, when combined with coherent strain engineering, opens additional prospects for fine‐tuning properties in oxides. |
| Freie Schlagworte: | dual‐phase coexistence, high entropy oxides, interfacial segregation, perpendicular magnetic anisotropy, strain‐engineering |
| ID-Nummer: | 2304038 |
| 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 > Gemeinschaftslabor Nanomaterialien |
| Hinterlegungsdatum: | 23 Jan 2024 07:05 |
| Letzte Änderung: | 23 Jan 2024 07:05 |
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| Suche nach Titel in: | TUfind oder in Google |
Verfügbare Versionen dieses Eintrags
-
Strain‐Driven Bidirectional Spin Orientation Control in Epitaxial High Entropy Oxide Films. (deposited 22 Jan 2024 13:26)
- Strain‐driven bidirectional spin orientation control in epitaxial high entropy oxide films. (deposited 23 Jan 2024 07:05) [Gegenwärtig angezeigt]
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