Local Magnetic Anisotropy of a Cobalt(II) Single-Ion Magnet Determined

June 15, 2023
Local Magnetic Anisotropy of a Cobalt(II) Single-Ion Magnet Determined
Molecular structure (left) and magnetic susceptibility tensor (blue ellipsoid) derived from joint powder/single-crystal polarized neutron refinement. Counterions and hydrogen atoms are omitted for clarity.

Scientific Achievement

Combined polarized powder and single-crystal neutron diffraction on the same single-ion molecular magnet accurately determine the local magnetic anisotropy parameters and benchmark for theoretical methods.

Significance and Impact

Magnetic anisotropy parameters are key for the design and optimization of single-ion magnets for potential applications such as high-density information storage, magnetic qubits, spintronic devices, and cryogenic refrigeration applications. 

Research Details

  • Polarized single-crystal and powder neutron data were collected at DEMAND (HFIR HB-3A) and D20 (ILL, Grenoble, France), respectively.
  • Complementary X-ray data were collected using lab-scale and synchrotron (SPring-8) instruments.

“Multi-Technique Experimental Benchmarking of the local Magnetic Anisotropy of a Cobalt(II) Single-Ion Magnet”
Sandeep K. Gupta, Hannah H. Nielsen, Andreas M. Thiel, Emil A. Klahn, Erxi Feng, Huibo B. Cao, Thomas C. Hansen, Eddy Lelièvre-Berna, Arsen Gukasov, Iurii Kibalin, Sebastian Dechert, Serhiy Demeshko, Jacob Overgaard, and Franc Meyer
JACS Au 3, 429-440 (2023). DOI: https://doi.org/10.1021/jacsau.2c00575