Abstract
Noncollinear hexagonal antiferromagnets with almost zero net magnetization were recently shown to demonstrate giant anomalous Hall effect. Here, we present the structural and magnetic properties of noncollinear antiferromagnetic thin films heteroepitaxially grown on Y: (111) substrates with a Ru underlayer. The films were crystallized in the hexagonal structure with -axis preferred (0001) crystal orientation. The films are discontinuous, forming large islands of approximately 400 nm in width, but are chemical homogeneous and characterized by near perfect heteroepitaxy. Furthermore, the thin films show weak ferromagnetism with an in-plane uncompensated magnetization of kA/m and coercivity of mT at room temperature. Additionally, the exchange bias effect was studied in /Py bilayers. Exchange bias fields up to mT can be achieved at 5 K. These results show films to be an attractive material for applications in antiferromagnetic spintronics.
- Received 12 February 2018
DOI:https://doi.org/10.1103/PhysRevMaterials.2.051001
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Published by the American Physical Society