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Two-channel anomalous Hall effect in SrRuO3

Accepted version
Peer-reviewed

Type

Article

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Authors

Sass, Paul M 
Woltjes, Bart 
Ko, Eun Kyo 
Noh, Tae Won 

Abstract

The Hall effect in SrRuO3 thin-films near the thickness limit for ferromagnetism shows an extra peak in addition to the ordinary and anomalous Hall effects. This extra peak has been attributed to a topological Hall effect due to two-dimensional skyrmions in the film around the coercive field; however, the sign of the anomalous Hall effect in SrRuO3 can change as a function of saturation magnetization. Here we report Hall peaks in SrRuO3 in which volumetric magnetometry measurements and magnetic force microscopy indicate that the peaks result from the superposition of two anomalous Hall channels with opposite sign. These channels likely form due to thickness variations in SrRuO3, creating two spatially separated magnetic regions with different saturation magnetizations and coercive fields. The results are central to the development of strongly correlated materials for spintronics.

Description

Keywords

51 Physical Sciences, 5104 Condensed Matter Physics

Journal Title

PHYSICAL REVIEW MATERIALS

Conference Name

Journal ISSN

2475-9953

Volume Title

4

Publisher

American Physical Society (APS)

Rights

All rights reserved
Sponsorship
Engineering and Physical Sciences Research Council (EP/N509620/1)
Engineering and Physical Sciences Research Council (EP/P026311/1)
EPSRC (1937217)
This work is supported by the EPSRC through the Core-to-Core International Network “Oxide Superspin” (EP/P026311/1) and the Doctoral Training Partnership Grant (EP/N509620/1). Additional support from the Office of Basic Energy Sciences Division of Materials Sciences and Engineering, US Department of Energy under Award numbers de-sc0018153, and the Research Center Program of IBS (Institute for Basic Science) in Korea (IBS-R009-D1).