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Direct Observation of Strong Anomalous Hall Effect and Proximity-induced Ferromagnetic State in SrIrO₃

Jaiswal, Arun Kumar 1; Wang, Di ORCID iD icon 2; Wollersen, Vanessa 2; Schneider, Rudolf 1; Le Tacon, Matthieu ORCID iD icon 1; Fuchs, Dirk 1
1 Institut für Quantenmaterialien und -technologien (IQMT), Karlsruher Institut für Technologie (KIT)
2 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)

Abstract (englisch):

The 5d iridium-based transition metal oxides have gained broad interest because of their strong spin-orbit coupling which favors new or exotic quantum electronic states. On the other hand, they rarely exhibit more mainstream orders like ferromagnetism due to generally weak electron-electron correlation strength. Here, we show a proximity-induced ferromagnetic (FM) state with TC ≈ 100 K and strong magnetocrystalline anisotropy in a SrIrO3 (SIO) heterostructure via interfacial charge transfer by using a ferromagnetic insulator in contact with SIO. Electrical transport allows to selectively probe the FM state of the SIO layer and the direct observation of a strong, intrinsic and positive anomalous Hall effect (AHE). For T ≤ 20 K, the AHE displays unusually large coercive and saturation field, a fingerprint of a strong pseudospin-lattice coupling. A Hall angle, σxyAHE/σxx, larger by an order of magnitude than in typical 3d metals and a FM net moment of about 0.1 μB/Ir, is reported. This emphasizes how efficiently the nontrivial topological band properties of SIO can be manipulated by structural modifications and the exchange interaction with 3d TMOs.

Verlagsausgabe §
DOI: 10.5445/IR/1000142494
Veröffentlicht am 24.06.2022
DOI: 10.1002/adma.202109163
Zitationen: 16
Web of Science
Zitationen: 16
Zitationen: 16
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Institut für Quantenmaterialien und -technologien (IQMT)
Karlsruhe Nano Micro Facility (KNMF)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 07.04.2022
Sprache Englisch
Identifikator ISSN: 0935-9648, 1521-4095
KITopen-ID: 1000142494
HGF-Programm 47.11.02 (POF IV, LK 01) Emergent Quantum Phenomena
Weitere HGF-Programme 43.35.03 (POF IV, LK 01) Structural and Functional Behavior of Solid State Systems
Erschienen in Advanced materials
Verlag John Wiley and Sons
Band 34
Heft 14
Seiten Article no: 2109163
Vorab online veröffentlicht am 26.01.2022
Nachgewiesen in Web of Science
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