Emergent Topological Hall Effect in La0.7Sr0.3MnO3/SrIrO3 Heterostructures

Yao Li; Lunyong Zhang; Qinghua Zhang; Chen Li; Tieying Yang; Yu Deng; Lin Gu; Di Wu

doi:10.1021/acsami.9b05562

Emergent Topological Hall Effect in La_0.7Sr_0.3MnO₃/SrIrO₃ Heterostructures

Yao Li
, Lunyong Zhang
, Qinghua Zhang
, Chen Li
, Tieying Yang
, Yu Deng
, Lin Gu
, Di Wu^*

^*Corresponding author for this work

Nanjing University
Pohang University of Science and Technology
Max Planck Institute for Chemical Physics of Solids
CAS - Institute of Physics
University of Chinese Academy of Sciences
Chinese Academy of Sciences

Research output: Contribution to journal › Article › peer-review

46 Scopus citations

Abstract

Recently, perovskite oxide heterostructures have drawn great attention because multiple and complex coupling at the heterointerface may produce novel magnetic and electric phenomena that are not expected in homogeneous materials either in the bulk or in films. In this work, we report for the first time that an emergent giant topological Hall effect (THE), associated with a noncoplanar (NC) spin texture, can be induced in ferromagnetic (FM) La_0.7Sr_0.3MnO₃ thin films in a wide temperature range of up to 200 K by constructing La_0.7Sr_0.3MnO₃/SrIrO₃ epitaxial heterostructures on (001) SrTiO₃ substrates. This THE is not observed in La_0.7Sr_0.3MnO₃ single-layer films or La_0.7Sr_0.3MnO₃/SrTiO₃/SrIrO₃ trilayer heterostructures, indicating the relevance of the La_0.7Sr_0.3MnO₃/SrIrO₃ interface, where the Dzyaloshinskii-Moriya interaction due to strong spin-orbital coupling in SrIrO₃ may play a crucial role. The fictitious field associated with THE is independent of temperature in La_0.7Sr_0.3MnO₃/SrIrO₃ heterostructures, suggesting that the NC spin texture may be magnetic skyrmions. This work demonstrates the feasibility of using SrIrO₃ to generate novel magnetic and transport characteristics by interfacing with other correlated oxides, which might be useful to novel spintronic applications.

Original language	English
Pages (from-to)	21268-21274
Number of pages	7
Journal	ACS Applied Materials and Interfaces
Volume	11
Issue number	23
DOIs	https://doi.org/10.1021/acsami.9b05562
State	Published - 12 Jun 2019
Externally published	Yes

Keywords

Dzyaloshinskii-Moriya interactions
SrIrO
interface coupling
noncoplanar spin texture
topological Hall effect

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10.1021/acsami.9b05562

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title = "Emergent Topological Hall Effect in La0.7Sr0.3MnO3/SrIrO3 Heterostructures",

abstract = "Recently, perovskite oxide heterostructures have drawn great attention because multiple and complex coupling at the heterointerface may produce novel magnetic and electric phenomena that are not expected in homogeneous materials either in the bulk or in films. In this work, we report for the first time that an emergent giant topological Hall effect (THE), associated with a noncoplanar (NC) spin texture, can be induced in ferromagnetic (FM) La0.7Sr0.3MnO3 thin films in a wide temperature range of up to 200 K by constructing La0.7Sr0.3MnO3/SrIrO3 epitaxial heterostructures on (001) SrTiO3 substrates. This THE is not observed in La0.7Sr0.3MnO3 single-layer films or La0.7Sr0.3MnO3/SrTiO3/SrIrO3 trilayer heterostructures, indicating the relevance of the La0.7Sr0.3MnO3/SrIrO3 interface, where the Dzyaloshinskii-Moriya interaction due to strong spin-orbital coupling in SrIrO3 may play a crucial role. The fictitious field associated with THE is independent of temperature in La0.7Sr0.3MnO3/SrIrO3 heterostructures, suggesting that the NC spin texture may be magnetic skyrmions. This work demonstrates the feasibility of using SrIrO3 to generate novel magnetic and transport characteristics by interfacing with other correlated oxides, which might be useful to novel spintronic applications.",

keywords = "Dzyaloshinskii-Moriya interactions, SrIrO, interface coupling, noncoplanar spin texture, topological Hall effect",

author = "Yao Li and Lunyong Zhang and Qinghua Zhang and Chen Li and Tieying Yang and Yu Deng and Lin Gu and Di Wu",

note = "Publisher Copyright: {\textcopyright} 2019 American Chemical Society.",

year = "2019",

month = jun,

day = "12",

doi = "10.1021/acsami.9b05562",

language = "英语",

volume = "11",

pages = "21268--21274",

journal = "ACS Applied Materials and Interfaces",

issn = "1944-8244",

publisher = "American Chemical Society",

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}

TY - JOUR

T1 - Emergent Topological Hall Effect in La0.7Sr0.3MnO3/SrIrO3 Heterostructures

AU - Li, Yao

AU - Zhang, Lunyong

AU - Zhang, Qinghua

AU - Li, Chen

AU - Yang, Tieying

AU - Deng, Yu

AU - Gu, Lin

AU - Wu, Di

PY - 2019/6/12

Y1 - 2019/6/12

N2 - Recently, perovskite oxide heterostructures have drawn great attention because multiple and complex coupling at the heterointerface may produce novel magnetic and electric phenomena that are not expected in homogeneous materials either in the bulk or in films. In this work, we report for the first time that an emergent giant topological Hall effect (THE), associated with a noncoplanar (NC) spin texture, can be induced in ferromagnetic (FM) La0.7Sr0.3MnO3 thin films in a wide temperature range of up to 200 K by constructing La0.7Sr0.3MnO3/SrIrO3 epitaxial heterostructures on (001) SrTiO3 substrates. This THE is not observed in La0.7Sr0.3MnO3 single-layer films or La0.7Sr0.3MnO3/SrTiO3/SrIrO3 trilayer heterostructures, indicating the relevance of the La0.7Sr0.3MnO3/SrIrO3 interface, where the Dzyaloshinskii-Moriya interaction due to strong spin-orbital coupling in SrIrO3 may play a crucial role. The fictitious field associated with THE is independent of temperature in La0.7Sr0.3MnO3/SrIrO3 heterostructures, suggesting that the NC spin texture may be magnetic skyrmions. This work demonstrates the feasibility of using SrIrO3 to generate novel magnetic and transport characteristics by interfacing with other correlated oxides, which might be useful to novel spintronic applications.

AB - Recently, perovskite oxide heterostructures have drawn great attention because multiple and complex coupling at the heterointerface may produce novel magnetic and electric phenomena that are not expected in homogeneous materials either in the bulk or in films. In this work, we report for the first time that an emergent giant topological Hall effect (THE), associated with a noncoplanar (NC) spin texture, can be induced in ferromagnetic (FM) La0.7Sr0.3MnO3 thin films in a wide temperature range of up to 200 K by constructing La0.7Sr0.3MnO3/SrIrO3 epitaxial heterostructures on (001) SrTiO3 substrates. This THE is not observed in La0.7Sr0.3MnO3 single-layer films or La0.7Sr0.3MnO3/SrTiO3/SrIrO3 trilayer heterostructures, indicating the relevance of the La0.7Sr0.3MnO3/SrIrO3 interface, where the Dzyaloshinskii-Moriya interaction due to strong spin-orbital coupling in SrIrO3 may play a crucial role. The fictitious field associated with THE is independent of temperature in La0.7Sr0.3MnO3/SrIrO3 heterostructures, suggesting that the NC spin texture may be magnetic skyrmions. This work demonstrates the feasibility of using SrIrO3 to generate novel magnetic and transport characteristics by interfacing with other correlated oxides, which might be useful to novel spintronic applications.

KW - Dzyaloshinskii-Moriya interactions

KW - SrIrO

KW - interface coupling

KW - noncoplanar spin texture

KW - topological Hall effect

UR - https://www.scopus.com/pages/publications/85067342130

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DO - 10.1021/acsami.9b05562

M3 - 文章

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AN - SCOPUS:85067342130

SN - 1944-8244

VL - 11

SP - 21268

EP - 21274

JO - ACS Applied Materials and Interfaces

JF - ACS Applied Materials and Interfaces

IS - 23

ER -

Emergent Topological Hall Effect in La_0.7Sr_0.3MnO₃/SrIrO₃ Heterostructures

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