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Stable humplike Hall effect and noncoplanar spin textures in SrRuO3 ultrathin films

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Title
Stable humplike Hall effect and noncoplanar spin textures in SrRuO3 ultrathin films
Author(s)
Byungmin Sohn; Bongju Kim; Se Young Park; Choi, Hwan Young; Moon, Jae Young; Choi, Taeyang; Choi, Young Jai; Zhou, Hua; Choi, Jun Woo; Bombardi, Alessandro; Porter, Dan. G.; Chang, Seo Hyoung; Han, Jung Hoon; Changyoung Kim
Publication Date
2021-06
Journal
Physical Review Research, v.3, no.2
Publisher
AMER PHYSICAL SOC
Abstract
© 2021 authors. Published by the American Physical Society.We observed a humplike feature in Hall effects of SrRuO3 ultrathin films, and systematically investigated it by controlling thicknesses, temperatures and magnetic fields. The humplike feature is extremely stable, even surviving as a magnetic field is tilted by as much as 85∘. Based on the atomic-level structural analysis of a SrRuO3 ultrathin film with a theoretical calculation, we reveal that atomic rumplings at the thin-film surface enhance Dzyaloshinskii-Moriya interaction, which can generate stable chiral spin textures and a humplike Hall effect. Moreover, temperature dependent resonant x-ray measurements at the Ru L edge under a magnetic field showed that the intensity modulation of unexpected peaks was correlated with the hump region in the Hall effect. We verify that the two-dimensional property of ultrathin films generates stable noncoplanar spin textures having a magnetic order in a ferromagnetic oxide material.
URI
https://pr.ibs.re.kr/handle/8788114/10552
DOI
10.1103/PhysRevResearch.3.023232
ISSN
2643-1564
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > 1. Journal Papers (저널논문)
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