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Title: Magnetism in iridate heterostructures leveraged by structural distortions

Abstract

Fundamental control of magnetic coupling through heterostructure morphology is a prerequisite for rational engineering of magnetic ground states. We report the tuning of magnetic interactions in superlattices composed of single and bilayers of SrIrO 3 inter-spaced with SrTiO 3 in analogy to the Ruddlesden-Popper series iridates. Magnetic scattering shows predominately c-axis antiferromagnetic orientation of the magnetic moments for the bilayer, as in Sr 3Ir 2O 7. However, the magnetic excitation gap, measured by resonant inelastic x-ray scattering, is quite different between the two structures, evidencing a significant change in the stability of the competing magnetic phases. In contrast, the single layer iridate hosts a more bulk-like gap. We find these changes are driven by bending of the c-axis Ir-O-Ir bond, which is much weaker in the single layer, and subsequent local environment changes, evidenced through x-ray diffraction and magnetic excitation modeling. Our findings demonstrate how large changes in the magnetic interactions can be tailored and probed in spin-orbit coupled heterostructures by engineering subtle structural modulations.

Authors:
 [1];  [1];  [1];  [1]; ORCiD logo [2];  [2];  [2];  [2];  [3]; ORCiD logo [4];  [4];  [4];  [4];  [4];  [4];  [4];  [5];  [6];  [7]; ORCiD logo [2] more »; ORCiD logo [1] « less
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
  2. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy
  3. Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Lab. for Condensed Matter Physics. Inst. of Physics; Univ. of Chinese Academy of Sciences, Beijing (China). School of Physical Sciences
  4. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source
  5. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source; Dublin City Univ. (Ireland). School of Physical Sciences
  6. Charles Univ., Prague (Czech Republic). Dept. of Condensed Matter Physics
  7. Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Lab. for Condensed Matter Physics. Inst. of Physics; Collaborative Innovation Center of Quantum Matter, Beijing (China)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States); Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Tennessee, Knoxville, TN (United States); Chinese Academy of Sciences (CAS), Beijing (China)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); Defense Advanced Research Projects Agency (DARPA) (United States); Ministry of Science and Technology (MOST) (China); Chinese Academy of Sciences (CAS) (China)
OSTI Identifier:
1501560
Report Number(s):
BNL-211401-2019-JAAM
Journal ID: ISSN 2045-2322
Grant/Contract Number:  
SC0012704; AC02-06CH11357; HR0011-16-1-0005; 2015CB921302; XDB07020200
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 9; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; magnetic properties and materials; phase transitions and critical phenomena

Citation Formats

Meyers, D., Cao, Yue, Fabbris, G., Robinson, Neil J., Hao, Lin, Frederick, C., Traynor, N., Yang, J., Lin, Jiaqi, Upton, M. H., Casa, D., Kim, Jong-Woo, Gog, T., Karapetrova, E., Choi, Yongseong, Haskel, D., Ryan, P. J., Horak, Lukas, Liu, X., Liu, Jian, and Dean, M. P. M.. Magnetism in iridate heterostructures leveraged by structural distortions. United States: N. p., 2019. Web. doi:10.1038/s41598-019-39422-9.
Meyers, D., Cao, Yue, Fabbris, G., Robinson, Neil J., Hao, Lin, Frederick, C., Traynor, N., Yang, J., Lin, Jiaqi, Upton, M. H., Casa, D., Kim, Jong-Woo, Gog, T., Karapetrova, E., Choi, Yongseong, Haskel, D., Ryan, P. J., Horak, Lukas, Liu, X., Liu, Jian, & Dean, M. P. M.. Magnetism in iridate heterostructures leveraged by structural distortions. United States. doi:10.1038/s41598-019-39422-9.
Meyers, D., Cao, Yue, Fabbris, G., Robinson, Neil J., Hao, Lin, Frederick, C., Traynor, N., Yang, J., Lin, Jiaqi, Upton, M. H., Casa, D., Kim, Jong-Woo, Gog, T., Karapetrova, E., Choi, Yongseong, Haskel, D., Ryan, P. J., Horak, Lukas, Liu, X., Liu, Jian, and Dean, M. P. M.. Tue . "Magnetism in iridate heterostructures leveraged by structural distortions". United States. doi:10.1038/s41598-019-39422-9. https://www.osti.gov/servlets/purl/1501560.
@article{osti_1501560,
title = {Magnetism in iridate heterostructures leveraged by structural distortions},
author = {Meyers, D. and Cao, Yue and Fabbris, G. and Robinson, Neil J. and Hao, Lin and Frederick, C. and Traynor, N. and Yang, J. and Lin, Jiaqi and Upton, M. H. and Casa, D. and Kim, Jong-Woo and Gog, T. and Karapetrova, E. and Choi, Yongseong and Haskel, D. and Ryan, P. J. and Horak, Lukas and Liu, X. and Liu, Jian and Dean, M. P. M.},
abstractNote = {Fundamental control of magnetic coupling through heterostructure morphology is a prerequisite for rational engineering of magnetic ground states. We report the tuning of magnetic interactions in superlattices composed of single and bilayers of SrIrO3 inter-spaced with SrTiO3 in analogy to the Ruddlesden-Popper series iridates. Magnetic scattering shows predominately c-axis antiferromagnetic orientation of the magnetic moments for the bilayer, as in Sr3Ir2O7. However, the magnetic excitation gap, measured by resonant inelastic x-ray scattering, is quite different between the two structures, evidencing a significant change in the stability of the competing magnetic phases. In contrast, the single layer iridate hosts a more bulk-like gap. We find these changes are driven by bending of the c-axis Ir-O-Ir bond, which is much weaker in the single layer, and subsequent local environment changes, evidenced through x-ray diffraction and magnetic excitation modeling. Our findings demonstrate how large changes in the magnetic interactions can be tailored and probed in spin-orbit coupled heterostructures by engineering subtle structural modulations.},
doi = {10.1038/s41598-019-39422-9},
journal = {Scientific Reports},
issn = {2045-2322},
number = ,
volume = 9,
place = {United States},
year = {2019},
month = {3}
}

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Works referenced in this record:

Oxide Interfaces--An Opportunity for Electronics
journal, March 2010


Engineering 1D Quantum Stripes from Superlattices of 2D Layered Materials
journal, October 2016

  • Gruenewald, John H.; Kim, Jungho; Kim, Heung Sik
  • Advanced Materials, Vol. 29, Issue 1, Article No. 1603798
  • DOI: 10.1002/adma.201603798