Ultrahard magnetism from mixed-valence dilanthanide complexes with metal-metal bonding

Colin A Gould; K Randall McClain; Daniel Reta; Jon G C Kragskow; David A Marchiori; Ella Lachman; Eun-Sang Choi; James G Analytis; R David Britt; Nicholas F Chilton; Benjamin G Harvey; Jeffrey R Long

doi:10.1126/science.abl5470

Ultrahard magnetism from mixed-valence dilanthanide complexes with metal-metal bonding

Science. 2022 Jan 14;375(6577):198-202. doi: 10.1126/science.abl5470. Epub 2022 Jan 13.

Authors

Colin A Gould^#¹, K Randall McClain^#², Daniel Reta³, Jon G C Kragskow³, David A Marchiori⁴, Ella Lachman^{5

6}, Eun-Sang Choi⁷, James G Analytis^{5

6}, R David Britt⁴, Nicholas F Chilton³, Benjamin G Harvey², Jeffrey R Long^{1

6

8}

Affiliations

¹ Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA.
² US Navy, Naval Air Warfare Center, Weapons Division, Research Department, Chemistry Division, China Lake, CA 93555, USA.
³ Department of Chemistry, School of Natural Sciences, The University of Manchester, Manchester M13 9 PL, UK.
⁴ Department of Chemistry, University of California, Davis, Davis, CA 95616, USA.
⁵ Department of Physics, University of California, Berkeley, Berkeley, CA 94720, USA.
⁶ Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
⁷ National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32310, USA.
⁸ Department of Chemical and Biomolecular Engineering, University of California, Berkeley, Berkeley, CA 94720, USA.

^# Contributed equally.

PMID: 35025637
DOI: 10.1126/science.abl5470

Abstract

Magnetic effects of lanthanide bonding Lanthanide coordination compounds have attracted attention for their persistent magnetic properties near liquid nitrogen temperature, well above alternative molecular magnets. Gould et al. report that introducing metal-metal bonding can enhance coercivity. Reduction of iodide-bridged terbium or dysprosium dimers resulted in a single electron bond between the metals, which enforced alignment of the other valence electrons. The resultant coercive fields exceeded 14 tesla below 50 and 60 kelvin for the terbium and dysprosium compounds, respectively. —JSY

Publication types

Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.