Exchange Bias in La<sub>0.67</sub>Sr<sub>0.33</sub>MnO<sub>3</sub>/YFeO<sub>3</sub> Ferromagnet/Antiferromagnet Multilayer Heterostructures
Exchange bias (EB), manifested as a hysteresis-loop offset after field-cooling, is demonstrated in perovskite-structured ferromagnet/antiferromagnet (La<sub>0.67</sub>Sr<sub>0.33</sub>MnO<sub>3</sub>/YFeO<sub>3</sub>)<sub>n</sub> heterostructures grown on (100) SrTiO<sub>3</sub> substrates. Bilayer samples show an EB of 306 Oe at 50 K, whereas multilayers with five layers exhibit an exchange bias of up to 424 Oe at 50 K. A spin valve consisting of La<sub>0.67</sub>Sr<sub>0.33</sub>MnO<sub>3</sub>/SrTiO<sub>3</sub>/La<sub>0.67</sub>Sr<sub>0.33</sub>MnO<sub>3</sub>/YFeO<sub>3</sub> shows stable remanent configurations resulting from pinning of the upper La<sub>0.67</sub>Sr<sub>0.33</sub>MnO<sub>3</sub> layer by the YFeO<sub>3</sub>. In contrast, EB is not observed on (111)-oriented SrTiO<sub>3</sub> substrates due to interface roughening. These results demonstrate YFeO<sub>3</sub> as an alternative orthoferrite antiferromagnet compared to BiFeO<sub>3</sub> and LaFeO<sub>3</sub> for incorporation into exchange-biased heterostructures.
Authors
- Eunsoo Cho (ORCID: https://orcid.org/0000-0002-0740-0192)
- Paul Fourmont (ORCID: https://orcid.org/0000-0002-1744-1908)
- Sylvain G. Cloutier (ORCID: https://orcid.org/0000-0003-0092-5241)
- Caroline A. Ross (ORCID: https://orcid.org/0000-0003-2262-1249)
Institutions
- Massachusetts Institute of Technology (US)
- École de Technologie Supérieure (CA)
Publication Details
- Journal
- Small
- Published
- 2025-04-13
- DOI
- https://doi.org/10.1002/smll.202501644
- Citations
- 1
- Primary Topic
- Magnetic and transport properties of perovskites and related materials
- Type
- article
- Field-Weighted Citation Impact
- 0.43
Funders
- National Science Foundation
- University of Pennsylvania
- Canada Research Chairs
- Natural Sciences and Engineering Research Council of Canada
- Division of Materials Research