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

Title
Stable humplike Hall effect and noncoplanar spin textures in SrRuO3 ultrathin films
Authors
최준우Byungmin SohnBongju KimSe Young ParkHwan Young ChoiJae Young MoonTaeyang ChoiYoung Jai ChoiHua ZhouAlessandro BombardiDan. G. PorterSeo Hyoung ChangJung Hoon HanChangyoung Kim
Keywords
SrRuO3
Issue Date
2021-06
Publisher
PHYSICAL REVIEW RESEARCH
Citation
VOL 3, 023232
Abstract
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
http://pubs.kist.re.kr/handle/201004/73369
ISSN
2643-1564
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