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Exchange Bias in a Layered Metal–Organic Topological Spin Glass

preprint
submitted on 21.12.2020, 20:51 and posted on 23.12.2020, 05:33 by Ryan Murphy, Lucy Darago, Michael Ziebel, Elizabeth A. Peterson, Edmond W. Zaia, Michael W. Mara, Daniel J. Lussier, David K. Shuh, Jeffrey J. Urban, Jeffrey B. Neaton, Jeffrey R. Long

The discovery of conductive and magnetic two-dimensional (2D) materials is critical for the development of next generation spintronics devices. Coordination chemistry in particular represents a highly versatile, though underutilized, route toward the synthesis of such materials with designer lattices. Here, we report the synthesis of a conductive, layered 2D metal–organic kagome lattice, Mn3(C6S6), using mild solution-phase chemistry. Strong geometric spin frustration in this system mediates spin freezing at low temperatures, which results in glassy magnetic behavior consistent with a geometrically frustrated (topological) spin glass. Notably, the material exhibits a large exchange bias of 1625 Oe, providing the first example of exchange bias in a coordination solid or a topological spin glass. More generally, these results demonstrate the potential utility of geometrically frustrated lattices in the design of new nanoscale spintronic materials.

Funding

DMR-1747426

DE-SC0016961

DE-SC0019356

History

Email Address of Submitting Author

r.a.murphy@berkeley.edu

Institution

University of California, Berkeley, College of Chemistry

Country

United States

ORCID For Submitting Author

0000-0002-3695-2295

Declaration of Conflict of Interest

no conflict of interest

Version Notes

Version one

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