Confinement of magnetism in atomically thin La0.7Sr0.3CrO3/La0.7Sr0.3MnO3 heterostructures
Abstract
Abstract At crystalline interfaces where a valence-mismatch exists, electronic, and structural interactions may occur to relieve the polar mismatch, leading to the stabilization of non-bulk-like phases. We show that spontaneous reconstructions at polar La 0.7 Sr 0.3 MnO 3 interfaces are correlated with suppressed ferromagnetism for film thicknesses on the order of a unit cell. We investigate the structural and magnetic properties of valence-matched La 0.7 Sr 0.3 CrO 3 /La 0.7 Sr 0.3 MnO 3 interfaces using a combination of high-resolution electron microscopy, first principles theory, synchrotron X-ray scattering and magnetic spectroscopy and temperature-dependent magnetometry. A combination of an antiferromagnetic coupling between the La 0.7 Sr 0.3 CrO 3 and La 0.7 Sr 0.3 MnO 3 layers and a suppression of interfacial polar distortions are found to result in robust long-range ferromagnetic ordering for ultrathin La 0.7 Sr 0.3 MnO 3 . These results underscore the critical importance of interfacial structural and magnetic interactions in the design of devices based on two-dimensional oxide magnetic systems.
- Publication Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
- Sponsoring Org.:
- National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES); State of North Carolina; Flatiron Institute’s Scientific Computing Core
- OSTI Identifier:
- 1619712
- Alternate Identifier(s):
- OSTI ID: 1542994
- Grant/Contract Number:
- AC02-05CH11231; DMR-1751455; DMR-1350273; AC02-06CH11357; ECCS-1542015
- Resource Type:
- Published Article
- Journal Name:
- npj Quantum Materials
- Additional Journal Information:
- Journal Name: npj Quantum Materials Journal Volume: 4 Journal Issue: 1; Journal ID: ISSN 2397-4648
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United Kingdom
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Magnetic properties and materials; Theory and computation
Citation Formats
Koohfar, Sanaz, Georgescu, Alexandru B., Penn, Aubrey N., LeBeau, James M., Arenholz, Elke, and Kumah, Divine P. Confinement of magnetism in atomically thin La0.7Sr0.3CrO3/La0.7Sr0.3MnO3 heterostructures. United Kingdom: N. p., 2019.
Web. doi:10.1038/s41535-019-0164-1.
Koohfar, Sanaz, Georgescu, Alexandru B., Penn, Aubrey N., LeBeau, James M., Arenholz, Elke, & Kumah, Divine P. Confinement of magnetism in atomically thin La0.7Sr0.3CrO3/La0.7Sr0.3MnO3 heterostructures. United Kingdom. https://doi.org/10.1038/s41535-019-0164-1
Koohfar, Sanaz, Georgescu, Alexandru B., Penn, Aubrey N., LeBeau, James M., Arenholz, Elke, and Kumah, Divine P. Wed .
"Confinement of magnetism in atomically thin La0.7Sr0.3CrO3/La0.7Sr0.3MnO3 heterostructures". United Kingdom. https://doi.org/10.1038/s41535-019-0164-1.
@article{osti_1619712,
title = {Confinement of magnetism in atomically thin La0.7Sr0.3CrO3/La0.7Sr0.3MnO3 heterostructures},
author = {Koohfar, Sanaz and Georgescu, Alexandru B. and Penn, Aubrey N. and LeBeau, James M. and Arenholz, Elke and Kumah, Divine P.},
abstractNote = {Abstract At crystalline interfaces where a valence-mismatch exists, electronic, and structural interactions may occur to relieve the polar mismatch, leading to the stabilization of non-bulk-like phases. We show that spontaneous reconstructions at polar La 0.7 Sr 0.3 MnO 3 interfaces are correlated with suppressed ferromagnetism for film thicknesses on the order of a unit cell. We investigate the structural and magnetic properties of valence-matched La 0.7 Sr 0.3 CrO 3 /La 0.7 Sr 0.3 MnO 3 interfaces using a combination of high-resolution electron microscopy, first principles theory, synchrotron X-ray scattering and magnetic spectroscopy and temperature-dependent magnetometry. A combination of an antiferromagnetic coupling between the La 0.7 Sr 0.3 CrO 3 and La 0.7 Sr 0.3 MnO 3 layers and a suppression of interfacial polar distortions are found to result in robust long-range ferromagnetic ordering for ultrathin La 0.7 Sr 0.3 MnO 3 . These results underscore the critical importance of interfacial structural and magnetic interactions in the design of devices based on two-dimensional oxide magnetic systems.},
doi = {10.1038/s41535-019-0164-1},
journal = {npj Quantum Materials},
number = 1,
volume = 4,
place = {United Kingdom},
year = {Wed May 29 00:00:00 EDT 2019},
month = {Wed May 29 00:00:00 EDT 2019}
}
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