Journal article
Strong intrinsic multiferroism and magnetoelectric coupling in (1- x )BiFeO 3 -( x )BaTiO 3 films
Proceedings of the National Academy of Sciences - PNAS, v 123(18), e2603475123
05 May 2026
PMID: 42048465
Featured in Collection : Drexel's Newest Publications
Abstract
The coexistence of ferroelectric and antiferromagnetic order in BiFeO makes it promising for next-generation magnetoelectric devices. But, single-phase multiferroics with robust room-temperature polarization and magnetization are rare. Here, enhanced, room-temperature ferroelectric polarization (≈ 120 µC cm), saturation magnetization (≈ 40 emu cm), and strong magnetoelectric coupling (≈ 400 mV cm Oe) are observed in epitaxial (1-)BiFeO-()BaTiO thin films. These values of magnetization and magnetoelectric coupling are, respectively, one- and two-orders of magnitude larger than those same properties in the widely studied parent material BiFeO. This sought after combination of properties is found in a distinct tetragonal phase, which is different from rhombohedral and super-tetragonal variants of BiFeO, that emerges at = 0.2 to 0.3 via combined chemical substitution and epitaxial strain. Structural and physical-property characterization, along with first-principles calculations, reveal a transition from monoclinic to tetragonal symmetry and suggest that short-range ordering of the titanium in the tetragonal phase results in ferrimagnetic spin ordering. This work demonstrates a unique single-phase multiferroic combining strong polarization, magnetization, and magnetoelectric coupling achieved through manipulation of the coupled chemical order and spin order; thereby addressing a major challenge in multiferroics research and providing a path toward practical room-temperature, efficient charge-to-spin and spin-to-charge conversion technologies.
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Details
- Title
- Strong intrinsic multiferroism and magnetoelectric coupling in (1- x )BiFeO 3 -( x )BaTiO 3 films
- Creators
- Tae Yeon Kim - Rice Research InstituteJesse Schimpf - University of California SystemAtanu Paul - Bar-Ilan UniversityMichael Xu - Massachusetts Institute of TechnologyAtanu Samanta - Bar-Ilan UniversitySajid Husain - Lawrence Berkeley National LaboratoryPeter Meisenheimer - University of California SystemIsaac Harris - Lawrence Berkeley National LaboratoryPeter Finkel - United States Naval Research LaboratoryThomas Mion - United States Naval Research LaboratoryMargo Staruch - United States Naval Research LaboratoryAnthony J Ruffino - Drexel UniversityStefan Masiuk - Drexel UniversityLiyan Wu - Drexel UniversityTae Joon Park - Korea UniversityDeokyoung Kang - University of California SystemChristoph Klewe - Lawrence Berkeley National LaboratoryPaul Stevenson - Northeastern UniversityRamamoorthy Ramesh - Rice UniversityAndrew M Rappe - University of PennsylvaniaJames M LeBeau - Massachusetts Institute of TechnologyJonathan E Spanier - Drexel UniversityIlya Grinberg - Bar-Ilan UniversityLane W Martin (Corresponding Author) - Rice University
- Publication Details
- Proceedings of the National Academy of Sciences - PNAS, v 123(18), e2603475123
- Publisher
- National Academy of Science
- Grant note
- W911NF-21-1-0126 / DOD | USA | AFC | CCDC | Army Research Office (ARO) DE-AC02-05CH11231 / DOE | SC | LBNL | Advanced Light Source (ALS) W911NF-24-2-0100 / DOD | USA | AFC | CCDC | DEVCOM Army Research Laboratory (DEVCOM ARL) DMR-2102895 / National Science Foundation (NSF) #22032 / Massachusetts | Massachusetts Technology Collaborative (MassTech) W911NF-21-2-0162 / DOD | USA | AFC | CCDC | Army Research Office (ARO) DMR-2329111 / National Science Foundation (NSF) 1479/21 / Israel Science Foundation (ISF) W911NF-21-1-0118 / DOD | USA | AFC | CCDC | Army Research Office (ARO) DE-AC02-05-CH11231 / U.S. Department of Energy (DOE)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics; Mechanical Engineering and Mechanics
- Other Identifier
- 991022176965904721