Tunnelling anisotropic magnetoresistance at La0.67Sr0.33MnO3-graphene interfaces

Phillips, L. C.
Lombardo, A.
Ghidini, M.
Yan, W.
Kar-Narayan, S.
Hämäläinen, S. J.
Barbone, M.
Milana, S.
Van Dijken, S.
Ferrari, A. C.
Mathur, N. D.

Open link

Publication date

March 2017

DOI

10.1063/1.4942778

Publisher

AIP Publishing

ISSN

0003-6951

Journal

Applied Physics Letters

Abstract

Using ferromagnetic La0.67Sr0.33MnO3 electrodes bridged by single-layer graphene, we observe magnetoresistive changes of ∼32-35 MΩ at 5 K. Magneto-optical Kerr effect microscopy at the same temperature reveals that the magnetoresistance arises from in-plane reorientations of electrode magnetization, evidencing tunnelling anisotropic magnetoresistance at the La0.67Sr0.33MnO3-graphene interfaces. Large resistance switching without spin transport through the non-magnetic channel could be attractive for graphene-based magnetic-sensing applications.Peer reviewe