Reversible hydrogen-ion control of the antiferromagnetic anisotropy in α-Fe<sub>2</sub>O<sub>3</sub>

Bulletin of the American Physical Society

Bulletin Home

APS March Meeting 2021

Volume 66, Number 1

Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA

Session R37: Antiferromagnetism and Emergent Magnetism in Oxide Thin Films

8:00 AM–11:00 AM, Thursday, March 18, 2021

Sponsoring Units: GMAG DMP DCOMP
Chair: Vlad Pribiag, University of Minnesota

Abstract: R37.00012 : Reversible hydrogen-ion control of the antiferromagnetic anisotropy in α-Fe₂O₃

10:36 AM–10:48 AM Live

Abstract

Presenter:

Hariom Jani
(Natl Univ of Singapore)

Authors:

Hariom Jani
(Natl Univ of Singapore)

Jiajun Linghu
(Natl Univ of Singapore)

Sonu Hooda
(Natl Univ of Singapore)

Rajesh Chopdekar
(Lawrence Berkeley Natl Lab)

Changjian LI
(Natl Univ of Singapore)

Ganesh Ji Omar
(Natl Univ of Singapore)

Saurav Prakash
(Natl Univ of Singapore)

Du Yonghua
(Natl Univ of Singapore)

Ping yang
(Natl Univ of Singapore)

Agnieszka Banas
(Natl Univ of Singapore)

Krzysztof Banas
(Natl Univ of Singapore)

Siddhartha Ghosh
(Natl Univ of Singapore)

Sunil Ojha
(IUAC)

G. R. Umapathy
(IUAC)

Dinakar Kanjilal
(IUAC)

Ariando Ariando
(Natl Univ of Singapore)

Stephen J Pennycook
(Natl Univ of Singapore)

Elke Arenholz
(Lawrence Berkeley Natl Lab)

Paolo G. Radaelli
(University of Oxford)

J M D Coey
(Trinity College)

Yuan Ping Feng
(Natl Univ of Singapore)

Thirumalai Venkatesan
(Natl Univ of Singapore)

Antiferromagnetic insulators are a ubiquitous class of magnetic materials, holding the promise of low-dissipation spin-based computing devices that can display ultra-fast switching and are robust against stray fields. However, their imperviousness to magnetic fields also makes them difficult to control in a reversible and scalable manner. Here we demonstrate a novel proof-of-principle ionic approach to drive a 90° spin-reorientation reversibly in the earth-abundant antiferromagnetic insulator α-Fe₂O₃ (hematite) – now an emerging spintronic material that hosts exotic topological antiferromagnetic spin-textures and long magnon-diffusion lengths. We use a low-temperature catalytic-spillover process involving the incorporation (or removal) of hydrogen from α-Fe₂O₃, post-growth, driving pronounced changes in its magnetic anisotropy, Néel-vector orientation and canted magnetism via electron injection and localized strains. We explain these effects with a detailed magnetic anisotropy model and first-principles calculations. Tailoring our work for future applications, we demonstrate control of the room-temperature spin-state by reversibly doping hydrogen in Rh-substituted α-Fe₂O₃.

About APS

The American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics.

Headquarters 1 Physics Ellipse, College Park, MD 20740-3844 (301) 209-3200
Editorial Office 100 Motor Pkwy, Suite 110, Hauppauge, NY 11788 (631) 591-4000
Office of Public Affairs 529 14th St NW, Suite 1050, Washington, D.C. 20045-2001 (202) 662-8700

Bulletin of the American Physical Society

APS March Meeting 2021

Volume 66, Number 1

Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA

Session R37: Antiferromagnetism and Emergent Magnetism in Oxide Thin Films

Abstract: R37.00012 : Reversible hydrogen-ion control of the antiferromagnetic anisotropy in α-Fe2O3

Presenter:

Authors:

Follow Us

Engage

My APS

Information for

About APS

Abstract: R37.00012 : Reversible hydrogen-ion control of the antiferromagnetic anisotropy in α-Fe₂O₃