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

• Published in: Science (American Association for the Advancement of Science) Vol. 375; no. 6577; pp. 198 - 202
• Main Authors: Gould, Colin A, McClain, K Randall, Reta, Daniel, Kragskow, Jon G C, Marchiori, David A, Lachman, Ella, Choi, Eun-Sang, Analytis, James G, Britt, R David, Chilton, Nicholas F, Harvey, Benjamin G, Long, Jeffrey R
• Format: Journal Article
• Language: English
• Published: United States The American Association for the Advancement of Science 14.01.2022
• Subjects: Alignment; Anisotropy; Bonding strength; Chemical bonds; Coercivity; Computer applications; Coordination compounds; Dimers; Dysprosium; Dysprosium compounds; Gadolinium; Iodides; Lanthanides; Liquid nitrogen; Lower bounds; Magnetic anisotropy; Magnetic effects; Magnetic fields; Magnetic properties; Magnetism; Magnets; Metal bonding; Metal-metal bonding; Metals; Single electrons; Terbium; Transition metals
• ISSN: 0036-8075; 1095-9203
• DOI: 10.1126/science.abl5470

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 . 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