---
_id: '9066'
abstract:
- lang: eng
  text: The novel electronic state of the canted antiferromagnetic (AFM) insulator,
    strontium iridate (Sr2IrO4) has been well described by the spin-orbit-entangled
    isospin Jeff = 1/2, but the role of isospin in transport phenomena remains poorly
    understood. In this study, antiferromagnet-based spintronic functionality is demonstrated
    by combining unique characteristics of the isospin state in Sr2IrO4. Based on
    magnetic and transport measurements, large and highly anisotropic magnetoresistance
    (AMR) is obtained by manipulating the antiferromagnetic isospin domains. First-principles
    calculations suggest that electrons whose isospin directions are strongly coupled
    to in-plane net magnetic moment encounter the isospin mismatch when moving across
    antiferromagnetic domain boundaries, which generates a high resistance state.
    By rotating a magnetic field that aligns in-plane net moments and removes domain
    boundaries, the macroscopically-ordered isospins govern dynamic transport through
    the system, which leads to the extremely angle-sensitive AMR. As with this work
    that establishes a link between isospins and magnetotransport in strongly spin-orbit-coupled
    AFM Sr2IrO4, the peculiar AMR effect provides a beneficial foundation for fundamental
    and applied research on AFM spintronics.
article_number: '1805564'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Nara
  full_name: Lee, Nara
  last_name: Lee
- first_name: Eunjung
  full_name: Ko, Eunjung
  last_name: Ko
- first_name: Hwan Young
  full_name: Choi, Hwan Young
  last_name: Choi
- first_name: Yun Jeong
  full_name: Hong, Yun Jeong
  last_name: Hong
- first_name: Muhammad
  full_name: Nauman, Muhammad
  id: 32c21954-2022-11eb-9d5f-af9f93c24e71
  last_name: Nauman
  orcid: 0000-0002-2111-4846
- first_name: Woun
  full_name: Kang, Woun
  last_name: Kang
- first_name: Hyoung Joon
  full_name: Choi, Hyoung Joon
  last_name: Choi
- first_name: Young Jai
  full_name: Choi, Young Jai
  last_name: Choi
- first_name: Younjung
  full_name: Jo, Younjung
  last_name: Jo
citation:
  ama: Lee N, Ko E, Choi HY, et al. Antiferromagnet‐based spintronic functionality
    by controlling isospin domains in a layered perovskite iridate. <i>Advanced Materials</i>.
    2018;30(52). doi:<a href="https://doi.org/10.1002/adma.201805564">10.1002/adma.201805564</a>
  apa: Lee, N., Ko, E., Choi, H. Y., Hong, Y. J., Nauman, M., Kang, W., … Jo, Y. (2018).
    Antiferromagnet‐based spintronic functionality by controlling isospin domains
    in a layered perovskite iridate. <i>Advanced Materials</i>. Wiley. <a href="https://doi.org/10.1002/adma.201805564">https://doi.org/10.1002/adma.201805564</a>
  chicago: Lee, Nara, Eunjung Ko, Hwan Young Choi, Yun Jeong Hong, Muhammad Nauman,
    Woun Kang, Hyoung Joon Choi, Young Jai Choi, and Younjung Jo. “Antiferromagnet‐based
    Spintronic Functionality by Controlling Isospin Domains in a Layered Perovskite
    Iridate.” <i>Advanced Materials</i>. Wiley, 2018. <a href="https://doi.org/10.1002/adma.201805564">https://doi.org/10.1002/adma.201805564</a>.
  ieee: N. Lee <i>et al.</i>, “Antiferromagnet‐based spintronic functionality by controlling
    isospin domains in a layered perovskite iridate,” <i>Advanced Materials</i>, vol.
    30, no. 52. Wiley, 2018.
  ista: Lee N, Ko E, Choi HY, Hong YJ, Nauman M, Kang W, Choi HJ, Choi YJ, Jo Y. 2018.
    Antiferromagnet‐based spintronic functionality by controlling isospin domains
    in a layered perovskite iridate. Advanced Materials. 30(52), 1805564.
  mla: Lee, Nara, et al. “Antiferromagnet‐based Spintronic Functionality by Controlling
    Isospin Domains in a Layered Perovskite Iridate.” <i>Advanced Materials</i>, vol.
    30, no. 52, 1805564, Wiley, 2018, doi:<a href="https://doi.org/10.1002/adma.201805564">10.1002/adma.201805564</a>.
  short: N. Lee, E. Ko, H.Y. Choi, Y.J. Hong, M. Nauman, W. Kang, H.J. Choi, Y.J.
    Choi, Y. Jo, Advanced Materials 30 (2018).
date_created: 2021-02-02T15:50:58Z
date_published: 2018-10-29T00:00:00Z
date_updated: 2021-02-03T13:58:39Z
day: '29'
doi: 10.1002/adma.201805564
extern: '1'
external_id:
  arxiv:
  - '1811.04562'
intvolume: '        30'
issue: '52'
keyword:
- Mechanical Engineering
- General Materials Science
- Mechanics of Materials
language:
- iso: eng
month: '10'
oa_version: Preprint
publication: Advanced Materials
publication_identifier:
  issn:
  - 0935-9648
  - 1521-4095
publication_status: published
publisher: Wiley
quality_controlled: '1'
status: public
title: Antiferromagnet‐based spintronic functionality by controlling isospin domains
  in a layered perovskite iridate
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 30
year: '2018'
...