---
_id: '10735'
abstract:
- lang: eng
  text: Magnetic anisotropy in strontium iridate (Sr2IrO4) is essential because of
    its strong spin–orbit coupling and crystal field effect. In this paper, we present
    a detailed mapping of the out-of-plane (OOP) magnetic anisotropy in Sr2IrO4 for
    different sample orientations using torque magnetometry measurements in the low-magnetic-field
    region before the isospins are completely ordered. Dominant in-plane anisotropy
    was identified at low fields, confirming the b axis as an easy magnetization axis.
    Based on the fitting analysis of the strong uniaxial magnetic anisotropy, we observed
    that the main anisotropic effect arises from a spin–orbit-coupled magnetic exchange
    interaction affecting the OOP interaction. The effect of interlayer exchange interaction
    results in additional anisotropic terms owing to the tilting of the isospins.
    The results are relevant for understanding OOP magnetic anisotropy and provide
    a new way to analyze the effects of spin–orbit-coupling and interlayer magnetic
    exchange interactions. This study provides insight into the understanding of bulk
    magnetic, magnetotransport, and spintronic behavior on Sr2IrO4 for future studies.
acknowledgement: 'YJ was supported by the National Research Foundation of Korea (NRF)
  (Grant Nos. NRF-2018K2A9A1A06069211 and NRF-2019R1A2C1089017). The work at Yonsei
  was supported by the NRF (Grant Nos. NRF-2017R1A5A-1014862 (SRC program: vdWMRC
  center), NRF-2019R1A2C2002601, and NRF-2021R1A2C1006375). WK acknowledges the support
  by the NRF (Grant Nos. 2018R1D1A1B07050087, 2018R1A6A1A03025340).'
article_number: '135802'
article_processing_charge: No
article_type: original
author:
- first_name: Muhammad
  full_name: Nauman, Muhammad
  id: 32c21954-2022-11eb-9d5f-af9f93c24e71
  last_name: Nauman
  orcid: 0000-0002-2111-4846
- first_name: Tayyaba
  full_name: Hussain, Tayyaba
  last_name: Hussain
- first_name: Joonyoung
  full_name: Choi, Joonyoung
  last_name: Choi
- first_name: Nara
  full_name: Lee, Nara
  last_name: Lee
- first_name: Young Jai
  full_name: Choi, Young Jai
  last_name: Choi
- first_name: Woun
  full_name: Kang, Woun
  last_name: Kang
- first_name: Younjung
  full_name: Jo, Younjung
  last_name: Jo
citation:
  ama: 'Nauman M, Hussain T, Choi J, et al. Low-field magnetic anisotropy of Sr2IrO4.
    <i>Journal of physics: Condensed matter</i>. 2022;34(13). doi:<a href="https://doi.org/10.1088/1361-648X/ac484d">10.1088/1361-648X/ac484d</a>'
  apa: 'Nauman, M., Hussain, T., Choi, J., Lee, N., Choi, Y. J., Kang, W., &#38; Jo,
    Y. (2022). Low-field magnetic anisotropy of Sr2IrO4. <i>Journal of Physics: Condensed
    Matter</i>. IOP Publishing. <a href="https://doi.org/10.1088/1361-648X/ac484d">https://doi.org/10.1088/1361-648X/ac484d</a>'
  chicago: 'Nauman, Muhammad, Tayyaba Hussain, Joonyoung Choi, Nara Lee, Young Jai
    Choi, Woun Kang, and Younjung Jo. “Low-Field Magnetic Anisotropy of Sr2IrO4.”
    <i>Journal of Physics: Condensed Matter</i>. IOP Publishing, 2022. <a href="https://doi.org/10.1088/1361-648X/ac484d">https://doi.org/10.1088/1361-648X/ac484d</a>.'
  ieee: 'M. Nauman <i>et al.</i>, “Low-field magnetic anisotropy of Sr2IrO4,” <i>Journal
    of physics: Condensed matter</i>, vol. 34, no. 13. IOP Publishing, 2022.'
  ista: 'Nauman M, Hussain T, Choi J, Lee N, Choi YJ, Kang W, Jo Y. 2022. Low-field
    magnetic anisotropy of Sr2IrO4. Journal of physics: Condensed matter. 34(13),
    135802.'
  mla: 'Nauman, Muhammad, et al. “Low-Field Magnetic Anisotropy of Sr2IrO4.” <i>Journal
    of Physics: Condensed Matter</i>, vol. 34, no. 13, 135802, IOP Publishing, 2022,
    doi:<a href="https://doi.org/10.1088/1361-648X/ac484d">10.1088/1361-648X/ac484d</a>.'
  short: 'M. Nauman, T. Hussain, J. Choi, N. Lee, Y.J. Choi, W. Kang, Y. Jo, Journal
    of Physics: Condensed Matter 34 (2022).'
date_created: 2022-02-06T23:01:31Z
date_published: 2022-01-20T00:00:00Z
date_updated: 2023-08-02T14:12:01Z
day: '20'
ddc:
- '530'
department:
- _id: KiMo
doi: 10.1088/1361-648X/ac484d
external_id:
  isi:
  - '000775191800001'
  pmid:
  - '34986467'
file:
- access_level: open_access
  checksum: b6c705c7f03dcb1dbcb06b1b4d4938d6
  content_type: application/pdf
  creator: cchlebak
  date_created: 2022-02-07T10:35:28Z
  date_updated: 2022-02-07T10:35:28Z
  file_id: '10741'
  file_name: 2022_JPhysCondensMatter_Nauman.pdf
  file_size: 1742414
  relation: main_file
  success: 1
file_date_updated: 2022-02-07T10:35:28Z
has_accepted_license: '1'
intvolume: '        34'
isi: 1
issue: '13'
language:
- iso: eng
month: '01'
oa: 1
oa_version: Published Version
pmid: 1
publication: 'Journal of physics: Condensed matter'
publication_identifier:
  eissn:
  - 1361-648X
publication_status: published
publisher: IOP Publishing
quality_controlled: '1'
scopus_import: '1'
status: public
title: Low-field magnetic anisotropy of Sr2IrO4
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 34
year: '2022'
...
---
_id: '7056'
abstract:
- lang: eng
  text: "In the Ca1−x La x FeAs2 (1 1 2) family of pnictide superconductors, we have
    investigated a highly overdoped composition (x  =  0.56), prepared by a high-pressure,
    high-temperature synthesis. Magnetic measurements show an antiferromagnetic transition
    at T N  =  120 K, well above the one at lower doping (0.15  <  x  <  0.27).\r\n\r\nBelow
    the onset of long-range magnetic order at T N, the electrical resistivity is strongly
    reduced and is dominated by electron–electron interactions, as evident from its
    temperature dependence. The Seebeck coefficient shows a clear metallic behavior
    as in narrow band conductors. The temperature dependence of the Hall coefficient
    and the violation of Kohler's rule agree with the multiband character of the material.
    No superconductivity was observed down to 1.8 K. The success of the high-pressure
    synthesis encourages further investigations of the so far only partially explored
    phase diagram in this family of Iron-based high temperature superconductors.\r\n"
article_number: '485705'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Edoardo
  full_name: Martino, Edoardo
  last_name: Martino
- first_name: Maja D
  full_name: Bachmann, Maja D
  last_name: Bachmann
- first_name: Lidia
  full_name: Rossi, Lidia
  last_name: Rossi
- first_name: Kimberly A
  full_name: Modic, Kimberly A
  id: 13C26AC0-EB69-11E9-87C6-5F3BE6697425
  last_name: Modic
  orcid: 0000-0001-9760-3147
- first_name: Ivica
  full_name: Zivkovic, Ivica
  last_name: Zivkovic
- first_name: Henrik M
  full_name: Rønnow, Henrik M
  last_name: Rønnow
- first_name: Philip J W
  full_name: Moll, Philip J W
  last_name: Moll
- first_name: Ana
  full_name: Akrap, Ana
  last_name: Akrap
- first_name: László
  full_name: Forró, László
  last_name: Forró
- first_name: Sergiy
  full_name: Katrych, Sergiy
  last_name: Katrych
citation:
  ama: 'Martino E, Bachmann MD, Rossi L, et al. Persistent antiferromagnetic order
    in heavily overdoped Ca1−x La x FeAs2. <i>Journal of Physics: Condensed Matter</i>.
    2019;31(48). doi:<a href="https://doi.org/10.1088/1361-648x/ab3b43">10.1088/1361-648x/ab3b43</a>'
  apa: 'Martino, E., Bachmann, M. D., Rossi, L., Modic, K. A., Zivkovic, I., Rønnow,
    H. M., … Katrych, S. (2019). Persistent antiferromagnetic order in heavily overdoped
    Ca1−x La x FeAs2. <i>Journal of Physics: Condensed Matter</i>. IOP Publishing.
    <a href="https://doi.org/10.1088/1361-648x/ab3b43">https://doi.org/10.1088/1361-648x/ab3b43</a>'
  chicago: 'Martino, Edoardo, Maja D Bachmann, Lidia Rossi, Kimberly A Modic, Ivica
    Zivkovic, Henrik M Rønnow, Philip J W Moll, Ana Akrap, László Forró, and Sergiy
    Katrych. “Persistent Antiferromagnetic Order in Heavily Overdoped Ca1−x La x FeAs2.”
    <i>Journal of Physics: Condensed Matter</i>. IOP Publishing, 2019. <a href="https://doi.org/10.1088/1361-648x/ab3b43">https://doi.org/10.1088/1361-648x/ab3b43</a>.'
  ieee: 'E. Martino <i>et al.</i>, “Persistent antiferromagnetic order in heavily
    overdoped Ca1−x La x FeAs2,” <i>Journal of Physics: Condensed Matter</i>, vol.
    31, no. 48. IOP Publishing, 2019.'
  ista: 'Martino E, Bachmann MD, Rossi L, Modic KA, Zivkovic I, Rønnow HM, Moll PJW,
    Akrap A, Forró L, Katrych S. 2019. Persistent antiferromagnetic order in heavily
    overdoped Ca1−x La x FeAs2. Journal of Physics: Condensed Matter. 31(48), 485705.'
  mla: 'Martino, Edoardo, et al. “Persistent Antiferromagnetic Order in Heavily Overdoped
    Ca1−x La x FeAs2.” <i>Journal of Physics: Condensed Matter</i>, vol. 31, no. 48,
    485705, IOP Publishing, 2019, doi:<a href="https://doi.org/10.1088/1361-648x/ab3b43">10.1088/1361-648x/ab3b43</a>.'
  short: 'E. Martino, M.D. Bachmann, L. Rossi, K.A. Modic, I. Zivkovic, H.M. Rønnow,
    P.J.W. Moll, A. Akrap, L. Forró, S. Katrych, Journal of Physics: Condensed Matter
    31 (2019).'
date_created: 2019-11-19T12:56:17Z
date_published: 2019-09-03T00:00:00Z
date_updated: 2021-01-12T08:11:35Z
day: '03'
doi: 10.1088/1361-648x/ab3b43
extern: '1'
external_id:
  arxiv:
  - '1905.08640'
intvolume: '        31'
issue: '48'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://arxiv.org/abs/1905.08640
month: '09'
oa: 1
oa_version: Preprint
publication: 'Journal of Physics: Condensed Matter'
publication_identifier:
  eissn:
  - 1361-648X
  issn:
  - 0953-8984
publication_status: published
publisher: IOP Publishing
quality_controlled: '1'
status: public
title: Persistent antiferromagnetic order in heavily overdoped Ca1−x La x FeAs2
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 31
year: '2019'
...