The exchange bias effect is an essential component of magnetic memory and spintronic devices. Whereas recent research has shown that anisotropies perpendicular to the device plane provide superior stability against thermal noise, it has proven remarkably difficult to realize perpendicular exchange bias in thin-film structures. Here we demonstrate a strong perpendicular exchange bias effect in heterostructures of the quasi-two-dimensional canted antiferromagnet La2CuO4 and ferromagnetic (La,Sr)MnO3 synthesized by ozone-assisted molecular beam epitaxy. The magnitude of this effect can be controlled via the doping level of the cuprate layers. Canted antiferromagnetism of layered oxides is thus a new and potentially powerful source of uniaxial anisotropy in magnetic devices.
@article{arxiv.1909.06152,
title = {Tunable perpendicular exchange bias in oxide heterostructures},
author = {Gideok Kim and Yury Khaydukov and Martin Bluschke and Y. Eren Suyolcu and Georg Christiani and Kwanghyo Son and Christopher Dietl and Thomas Keller and Eugen Weschke and P. A. van Aken and Gennady Logvenov and Bernhard Keimer},
journal= {arXiv preprint arXiv:1909.06152},
year = {2019}
}