The interplay of symmetry and quenched disorder leads to some of the most fundamentally interesting and technologically important properties of correlated materials. It also poses the most vexing of theoretical challenges. Nowhere is this more apparent than in the study of spin glasses. A spin glass is characterized by an ergodic landscape of states - an innumerable number of possibilities that are only weakly distinguished energetically, if at all. We show in the material FexNbS2, this landscape of states can be biased by coexisitng antiferromagnetic order. This process leads to a phenomenon of broad technological importance: giant, tunable exchange bias. We observe exchange biases that exceed those of conventional materials by more than two orders of magnitude. This work illustrates a novel route to giant exchange bias by leveraging the interplay of frustration and disorder in exotic materials.
@article{arxiv.1904.05872,
title = {Tunable Giant Exchange Bias in an Intercalated Transition Metal Dichalcogenide},
author = {Spencer Doyle and Caolan John and Eran Maniv and Ryan A. Murphy and Ariel Maniv and Sanath K. Ramakrishna and Yun-Long Tang and Ramamoorthy Ramesh and Jeffrey R. Long and Arneil P. Reyes and James G. Analytis},
journal= {arXiv preprint arXiv:1904.05872},
year = {2021}
}