Hysteretic magnetoresistance in superconducting SrTiO3/LaAlO3/SrTiO3 trilayer interface system

Yongsu Kwak; Woojoo Han; Nam Hee Kim; Myung Ho Bae; Mahn Soo Choi; Myung Hwa Jung; Yong Joo Doh; Joon Sung Lee; Jonghyun Song; Jinhee Kim

doi:10.1016/j.cap.2023.06.013

Hysteretic magnetoresistance in superconducting SrTiO₃/LaAlO₃/SrTiO₃ trilayer interface system

Yongsu Kwak, Woojoo Han, Nam Hee Kim, Myung Ho Bae, Mahn Soo Choi, Myung Hwa Jung, Yong Joo Doh, Joon Sung Lee, Jonghyun Song, Jinhee Kim

Department of Physics

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

1 Citation (Scopus)

Abstract

We investigated the electrical transport properties of the SrTiO₃/LaAlO₃/SrTiO₃ (STO/LAO/STO) trilayer interface system. We found that the trilayer exhibits superconductivity at temperatures below 0.2 K. In the superconducting regime, the magnetoresistance (MR) of the system shows pronounced hysteresis, possibly due to the interplay of ferromagnetism and superconductivity. The magnitude of MR hysteresis strongly depends on the magnetic field sweep rate, and we observed a threshold field-sweep rate below which no MR is detected. At high sweep rates, the MR exhibits superconducting-normal-superconducting transition behavior. To explain these observations, we propose a model based on the ohmic heating from superconducting phase slip centers beneath Bloch-type magnetic domain walls in the ferromagnetic layer. Furthermore, we observed complex features in the MR curves that are likely due to domain wall motion in the system.

Original language	English
Pages (from-to)	104-109
Number of pages	6
Journal	Current Applied Physics
Volume	53
DOIs	https://doi.org/10.1016/j.cap.2023.06.013
Publication status	Published - 2023 Sept

Bibliographical note

Funding Information:
This work was supported by Korea Institute for Advancement of Technology (KIAT) grant funded by the Korea Government (MOTIE) ( P0008458 , HRD Program for Industrial Innovation), Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education ( NRF-2020R1A6A1A03047771 , NRF-2016R1A5A1008184 , NRF-2021R1A2C3012612 ), NRF funded by the Ministry of Science and ICT (No. 2022M3H4A1A04074153 , 2020R1A2C1011000 , 2018R1A3B1052827 , 2020R1A2C3008044 ), and Electronics and Telecommunications Research Institute (ETRI) grant funded by the Korean government ( 22YB1500 ).

Publisher Copyright:
© 2023

Keywords

Ferromagnetism
LaAlO/SrTiO
Magnetoresistance
Phase slip center
SrTiO3/LaAlO3/SrTiO
Superconductivity

ASJC Scopus subject areas

General Materials Science
General Physics and Astronomy

Access to Document

10.1016/j.cap.2023.06.013

Cite this

@article{52863b7939d5425e8d9deabcea266f74,

title = "Hysteretic magnetoresistance in superconducting SrTiO3/LaAlO3/SrTiO3 trilayer interface system",

abstract = "We investigated the electrical transport properties of the SrTiO3/LaAlO3/SrTiO3 (STO/LAO/STO) trilayer interface system. We found that the trilayer exhibits superconductivity at temperatures below 0.2 K. In the superconducting regime, the magnetoresistance (MR) of the system shows pronounced hysteresis, possibly due to the interplay of ferromagnetism and superconductivity. The magnitude of MR hysteresis strongly depends on the magnetic field sweep rate, and we observed a threshold field-sweep rate below which no MR is detected. At high sweep rates, the MR exhibits superconducting-normal-superconducting transition behavior. To explain these observations, we propose a model based on the ohmic heating from superconducting phase slip centers beneath Bloch-type magnetic domain walls in the ferromagnetic layer. Furthermore, we observed complex features in the MR curves that are likely due to domain wall motion in the system.",

keywords = "Ferromagnetism, LaAlO/SrTiO, Magnetoresistance, Phase slip center, SrTiO3/LaAlO3/SrTiO, Superconductivity",

author = "Yongsu Kwak and Woojoo Han and Kim, {Nam Hee} and Bae, {Myung Ho} and Choi, {Mahn Soo} and Jung, {Myung Hwa} and Doh, {Yong Joo} and Lee, {Joon Sung} and Jonghyun Song and Jinhee Kim",

note = "Funding Information: This work was supported by Korea Institute for Advancement of Technology (KIAT) grant funded by the Korea Government (MOTIE) ( P0008458 , HRD Program for Industrial Innovation), Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education ( NRF-2020R1A6A1A03047771 , NRF-2016R1A5A1008184 , NRF-2021R1A2C3012612 ), NRF funded by the Ministry of Science and ICT (No. 2022M3H4A1A04074153 , 2020R1A2C1011000 , 2018R1A3B1052827 , 2020R1A2C3008044 ), and Electronics and Telecommunications Research Institute (ETRI) grant funded by the Korean government ( 22YB1500 ). Publisher Copyright: {\textcopyright} 2023",

year = "2023",

month = sep,

doi = "10.1016/j.cap.2023.06.013",

language = "English",

volume = "53",

pages = "104--109",

journal = "Current Applied Physics",

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TY - JOUR

T1 - Hysteretic magnetoresistance in superconducting SrTiO3/LaAlO3/SrTiO3 trilayer interface system

AU - Kwak, Yongsu

AU - Han, Woojoo

AU - Kim, Nam Hee

AU - Bae, Myung Ho

AU - Choi, Mahn Soo

AU - Jung, Myung Hwa

AU - Doh, Yong Joo

AU - Lee, Joon Sung

AU - Song, Jonghyun

AU - Kim, Jinhee

N1 - Funding Information: This work was supported by Korea Institute for Advancement of Technology (KIAT) grant funded by the Korea Government (MOTIE) ( P0008458 , HRD Program for Industrial Innovation), Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education ( NRF-2020R1A6A1A03047771 , NRF-2016R1A5A1008184 , NRF-2021R1A2C3012612 ), NRF funded by the Ministry of Science and ICT (No. 2022M3H4A1A04074153 , 2020R1A2C1011000 , 2018R1A3B1052827 , 2020R1A2C3008044 ), and Electronics and Telecommunications Research Institute (ETRI) grant funded by the Korean government ( 22YB1500 ). Publisher Copyright: © 2023

PY - 2023/9

Y1 - 2023/9

N2 - We investigated the electrical transport properties of the SrTiO3/LaAlO3/SrTiO3 (STO/LAO/STO) trilayer interface system. We found that the trilayer exhibits superconductivity at temperatures below 0.2 K. In the superconducting regime, the magnetoresistance (MR) of the system shows pronounced hysteresis, possibly due to the interplay of ferromagnetism and superconductivity. The magnitude of MR hysteresis strongly depends on the magnetic field sweep rate, and we observed a threshold field-sweep rate below which no MR is detected. At high sweep rates, the MR exhibits superconducting-normal-superconducting transition behavior. To explain these observations, we propose a model based on the ohmic heating from superconducting phase slip centers beneath Bloch-type magnetic domain walls in the ferromagnetic layer. Furthermore, we observed complex features in the MR curves that are likely due to domain wall motion in the system.

AB - We investigated the electrical transport properties of the SrTiO3/LaAlO3/SrTiO3 (STO/LAO/STO) trilayer interface system. We found that the trilayer exhibits superconductivity at temperatures below 0.2 K. In the superconducting regime, the magnetoresistance (MR) of the system shows pronounced hysteresis, possibly due to the interplay of ferromagnetism and superconductivity. The magnitude of MR hysteresis strongly depends on the magnetic field sweep rate, and we observed a threshold field-sweep rate below which no MR is detected. At high sweep rates, the MR exhibits superconducting-normal-superconducting transition behavior. To explain these observations, we propose a model based on the ohmic heating from superconducting phase slip centers beneath Bloch-type magnetic domain walls in the ferromagnetic layer. Furthermore, we observed complex features in the MR curves that are likely due to domain wall motion in the system.

KW - Ferromagnetism

KW - LaAlO/SrTiO

KW - Magnetoresistance

KW - Phase slip center

KW - SrTiO3/LaAlO3/SrTiO

KW - Superconductivity

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U2 - 10.1016/j.cap.2023.06.013

DO - 10.1016/j.cap.2023.06.013

M3 - Article

AN - SCOPUS:85164225518

SN - 1567-1739

VL - 53

SP - 104

EP - 109

JO - Current Applied Physics

JF - Current Applied Physics

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