Hump-like structure in Hall signal from ultra-thin SrRuO3films without inhomogeneous anomalous Hall effect

Title
Hump-like structure in Hall signal from ultra-thin SrRuO3films without inhomogeneous anomalous Hall effect
Authors
최준우Byungmin SohnBongju KimSeo Hyoung ChangJung Hoon HanChangyoung Kim
Keywords
thin film magnetism
Issue Date
2020-01
Publisher
Current applied physics
Citation
VOL 20, NO 1-190
Abstract
A controversy arose over the interpretation of the recently observed hump features in Hall resistivity from ultra-thin SrRuO3 (SRO) film; it was initially interpreted to be due to topological Hall effect but was later proposed to be from existence of regions with different anomalous Hall effect (AHE). In order to settle down the issue, we performed Hall effect as well as magneto-optic Kerr-effect measurements on 4 unit cell SRO films. Clear hump features are observed in , whereas neither hump feature nor double hysteresis loop is seen in the Kerr rotation which should be proportional to the magnetization. In addition, magnetization measurement by superconducting quantum interference device shows no sign of multiple coercive fields. These results show that inhomogeneous AHE alone cannot explain the observed hump behavior in data. We suggest that emergence of the hump structure in is closely related to the growth condition.
URI
http://pubs.kist.re.kr/handle/201004/70892
ISSN
1567-1739
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KIST Publication > Article
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