Evidence of dynamical effects and critical field in a cobalt spin crossover complex

Thilini K Ekanayaka; Ping Wang; Saeed Yazdani; Jared Paul Phillips; Esha Mishra; Ashley S Dale; Alpha T N'Diaye; Christoph Klewe; Padraic Shafer; John Freeland; Robert Streubel; James Paris Wampler; Vivien Zapf; Ruihua Cheng; Michael Shatruk; Peter A Dowben

doi:10.1039/d1cc05309d

Evidence of dynamical effects and critical field in a cobalt spin crossover complex

Chem Commun (Camb). 2022 Jan 13;58(5):661-664. doi: 10.1039/d1cc05309d.

Authors

Thilini K Ekanayaka¹, Ping Wang², Saeed Yazdani³, Jared Paul Phillips³, Esha Mishra¹, Ashley S Dale³, Alpha T N'Diaye⁴, Christoph Klewe⁴, Padraic Shafer⁴, John Freeland⁵, Robert Streubel^{1

6}, James Paris Wampler⁷, Vivien Zapf⁷, Ruihua Cheng³, Michael Shatruk², Peter A Dowben¹

Affiliations

¹ Department of Physics and Astronomy, Jorgensen Hall, University of Nebraska, Lincoln, NE 68588-0299, USA. pdowben1@unl.edu.
² Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, FL 32306, USA.
³ Department of Physics, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana 46202, USA.
⁴ Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
⁵ Argonne National Laboratory, Advanced Photon Source, Bldg. 431/E003, 9700 South Cass Ave., Argonne, IL 60439, USA.
⁶ Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, NE 68588, USA.
⁷ National High Magnetic Field Lab, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM 87545, USA.

PMID: 34914817
DOI: 10.1039/d1cc05309d

Abstract

The [Co(SQ)₂(4-CN-py)₂] complex exhibits dynamical effects over a wide range of temperature. The orbital moment, determined by X-ray magnetic circular dichroism (XMCD) with decreasing applied magnetic field, indicates a nonzero critical field for net alignment of magnetic moments, an effect not seen with the spin moment of [Co(SQ)₂(4-CN-py)₂].