Exchange Bias in La0.67Sr0.33MnO3/YFeO3 Ferromagnet/Antiferromagnet Multilayer Heterostructures

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

doi:10.1002/smll.202501644

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

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

Résultats de recherche: Contribution à un journal › Article publié dans une revue, révisé par les pairs › Revue par des pairs

1 Citation (Scopus)

Résumé

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.

langue originale	Anglais
Numéro d'article	2501644
journal	Small
Volume	21
Numéro de publication	21
Les DOIs	https://doi.org/10.1002/smll.202501644
état	Publié - 26 mai 2025

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10.1002/smll.202501644

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@article{69ce552b225e4c9d8f3a9469df521bf4,

title = "Exchange Bias in La0.67Sr0.33MnO3/YFeO3 Ferromagnet/Antiferromagnet Multilayer Heterostructures",

abstract = "Exchange bias (EB), manifested as a hysteresis-loop offset after field-cooling, is demonstrated in perovskite-structured ferromagnet/antiferromagnet (La0.67Sr0.33MnO3/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 La0.67Sr0.33MnO3/SrTiO3/La0.67Sr0.33MnO3/YFeO3 shows stable remanent configurations resulting from pinning of the upper La0.67Sr0.33MnO3 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.",

keywords = "epitaxial thin films, exchange bias, multilayers, perovskite, spin-valve",

author = "Paul Fourmont and Eunsoo Cho and Cloutier, \{Sylvain G.\} and Ross, \{Caroline A.\}",

note = "Publisher Copyright: {\textcopyright} 2025 The Author(s). Small published by Wiley-VCH GmbH.",

year = "2025",

month = may,

day = "26",

doi = "10.1002/smll.202501644",

language = "English",

volume = "21",

journal = "Small",

issn = "1613-6810",

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TY - JOUR

T1 - Exchange Bias in La0.67Sr0.33MnO3/YFeO3 Ferromagnet/Antiferromagnet Multilayer Heterostructures

AU - Fourmont, Paul

AU - Cho, Eunsoo

AU - Cloutier, Sylvain G.

AU - Ross, Caroline A.

PY - 2025/5/26

Y1 - 2025/5/26

N2 - Exchange bias (EB), manifested as a hysteresis-loop offset after field-cooling, is demonstrated in perovskite-structured ferromagnet/antiferromagnet (La0.67Sr0.33MnO3/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 La0.67Sr0.33MnO3/SrTiO3/La0.67Sr0.33MnO3/YFeO3 shows stable remanent configurations resulting from pinning of the upper La0.67Sr0.33MnO3 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.

AB - Exchange bias (EB), manifested as a hysteresis-loop offset after field-cooling, is demonstrated in perovskite-structured ferromagnet/antiferromagnet (La0.67Sr0.33MnO3/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 La0.67Sr0.33MnO3/SrTiO3/La0.67Sr0.33MnO3/YFeO3 shows stable remanent configurations resulting from pinning of the upper La0.67Sr0.33MnO3 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.

KW - epitaxial thin films

KW - exchange bias

KW - multilayers

KW - perovskite

KW - spin-valve

UR - https://www.scopus.com/pages/publications/105002471324

U2 - 10.1002/smll.202501644

DO - 10.1002/smll.202501644

M3 - Journal Article

AN - SCOPUS:105002471324

SN - 1613-6810

VL - 21

JO - Small

JF - Small

IS - 21

M1 - 2501644

ER -