|Title||Probing magnetism in 2D van der Waals crystalline insulators via electron tunneling|
|Publication Type||Journal Article|
|Year of Publication||2018|
|Authors||Klein, DR, MacNeill, D, Lado, JL, Soriano, D, Navarro-Moratalla, E, Watanabe, K, Taniguchi, T, Manni, S, Canfield, P, Fernandez-Rossier, J, Jarillo-Herrero, P|
|Type of Article||Article|
|Keywords||bilayers, field, hall, intrinsic ferromagnetism, junctions, polarization, spin-orbit torques, Technology - Other Topics, zero|
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. Themetamagnetic 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.
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