Publication Date

6-15-2018

Department

Ames Laboratory; Physics and Astronomy

Campus Units

Physics and Astronomy, Ames Laboratory

Report Number

IS-J 9697

DOI

10.1126/science.aar3617

Journal Title

Science

Volume Number

360

Issue Number

6394

First Page

1218

Last Page

1222

Abstract

Magnetic insulators are a key resource for next-generation spintronic and topological devices. The family of layered metal halides promises varied magnetic states, including ultrathin insulating multiferroics, spin liquids, and ferromagnets, but device-oriented characterization methods are needed to unlock their potential. Here, we report tunneling through the layered magnetic insulator CrI3 as a function of temperature and applied magnetic field. We electrically detect the magnetic ground state and interlayer coupling and observe a field-induced metamagnetic transition. The metamagnetic transition results in magnetoresistances of 95, 300, and 550% for bilayer, trilayer, and tetralayer CrI3 barriers, respectively. We further measure inelastic tunneling spectra for our junctions, unveiling a rich spectrum consistent with collective magnetic excitations (magnons) in CrI3.

Language

en

Department of Energy Subject Categories

77 NANOSCIENCE AND NANOTECHNOLOGY; 74 ATOMIC AND MOLECULAR PHYSICS

Publisher

Iowa State University Digital Repository, Ames IA (United States)

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