Exchange Bias in La_{0.67}Sr_{0.33}MnO₃/YFeO₃ Ferromagnet/Antiferromagnet Multilayer Heterostructures

Paul Fourmont; Eunsoo Cho; Sylvain G. Cloutier; Caroline A. Ross

doi:10.1002/smll.202501644

journal article·2025-05Open access

Exchange Bias in La_0.67Sr_0.33MnO₃/YFeO₃ Ferromagnet/Antiferromagnet Multilayer Heterostructures

Paul Fourmont, Eunsoo Cho, Sylvain G. Cloutier, Caroline A. Ross

Small· Volume 21· Issue 21

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Abstract

Abstract Exchange bias (EB), manifested as a hysteresis‐loop offset after field‐cooling, is demonstrated in perovskite‐structured ferromagnet/antiferromagnet (La_0.67Sr_0.33MnO₃/YFeO₃)_n heterostructures grown on (100) SrTiO₃ 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_0.67Sr_0.33MnO₃/SrTiO₃/La_0.67Sr_0.33MnO₃/YFeO₃ shows stable remanent configurations resulting from pinning of the upper La_0.67Sr_0.33MnO₃ layer by the YFeO₃. In contrast, EB is not observed on (111)‐oriented SrTiO₃ substrates due to interface roughening. These results demonstrate YFeO₃ as an alternative orthoferrite antiferromagnet compared to BiFeO₃ and LaFeO₃ for incorporation into exchange‐biased heterostructures.

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Research context

Electronic materials

OpenAlex topics: Magnetic and transport properties of perovskites and related materials · Multiferroics and related materials · Advanced Condensed Matter Physics

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

École de Technologie Supérieure Department of Electrical Engineering 1100 Notre Dame Street West Montreal Quebec H3C 1K3 Canada

Massachusetts Institute of Technology Department of Materials Science and Engineering 77 Massachusetts Avenue Cambridge MA 02139 USA

Funding

National Science Foundation · Canada Research Chairs

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