Manipulating topological Hall-like signatures by interface engineering in epitaxial ruthenate/manganite heterostructures

Roy, Pinku; Zhang, Di; Mazza, Alessandro R.; Cucciniello, Nicholas; Kunwar, Sundar; Zeng, Hao; Chen, Aiping; Jia, Quanxi

doi:10.1039/d3nr02407e

Manipulating topological Hall-like signatures by interface engineering in epitaxial ruthenate/manganite heterostructures

Journal Article · Wed Oct 11 00:00:00 EDT 2023 · Nanoscale

DOI:https://doi.org/10.1039/d3nr02407e· OSTI ID:2217516

^[1]; ^[2]; ^[2]; ^[1]; Kunwar, Sundar ^[2]; ^[3]; Chen, Aiping ^[2]; ^[3]

State Univ. of New York (SUNY), Buffalo, NY (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States). Center for Integrated Nanotechnologies (CINT)
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States). Center for Integrated Nanotechnologies (CINT)
State Univ. of New York (SUNY), Buffalo, NY (United States)

Topologically protected non-trivial spin textures (e.g. skyrmions) give rise to a novel phenomenon called the topological Hall effect (THE) and have promising implications in future energy-efficient nanoelectronic and spintronic devices. Here, we have studied the Hall effect in SrRuO₃/La_0.42Ca_0.58MnO₃ (SRO/LCMO) bilayers. Our investigation suggests that pure SRO has hard and soft magnetic characteristics but the anomalous Hall effect (AHE) in SRO is governed by the high coercivity phase. Here, we have shown that the proximity effect of a soft magnetic LCMO on SRO plays a critical role in interfacial magnetic coupling and transport properties in SRO. Upon reducing the SRO thickness in the bilayer, the proximity effect becomes the dominant feature, enhancing the magnitude and temperature range of THE-like signatures. The THE-like features in bilayers can be explained by a diffusive Berry phase transition model in the presence of an emergent magnetic state due to interface coupling. This work provides an alternative understanding of THE-like signatures and their manipulation in SRO-based heterostructures, bilayers and superlattices.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States). Center for Integrated Nanotechnologies (CINT)

Sponsoring Organization:: National Science Foundation (NSF); USDOE; USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)

Grant/Contract Number:: 89233218CNA000001

OSTI ID:: 2217516

Alternate ID(s):: OSTI ID: 2203480

Report Number(s):: LA-UR--23-32755

Journal Information:: Nanoscale, Journal Name: Nanoscale Journal Issue: 43 Vol. 15; ISSN 2040-3364

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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