Quantum Spin Wave Excited from a Cr–Dy Single-Molecule Magnet
The efficient excitation and controlled propagation of nanoscale spin waves remain significant challenges, as their intrinsic dispersion relations are primarily determined by magnetic dipole and exchange interactions. Here we report the first observed coexistence of quantum spin wave excitation and single-molecule magnet behavior in a mixed chromium(III) and dysprosium(III) complex, namely Dy<sub>4</sub>Cr<sub>2</sub>(<i>μ</i><sub>3</sub>-F)<sub>2</sub>(mdea)<sub>3</sub>(piv)<sub>10</sub>, which shows a large ferrimagnetic ground moment with a restricted quantum tunneling gap (<3.8 × 10<sup>-7</sup> cm<sup>-1</sup>) up to nine levels, leading to an axial anisotropic energy barrier of 12 cm<sup>-1</sup> and opened hysteresis loop at 0.4 K. More importantly, quantized spin wave excitations ranging from 108 to 352 GHz have been observed by using inelastic neutron scattering spectroscopy, and the data can be well explained by the <i>L</i>&<i>E</i>-band theory with <i>Δ</i>/2 = 2.08 cm<sup>-1</sup> and <i>ε</i>(<i>q</i>) = 2.5 cm<sup>-1</sup>, providing unambiguous evidence for nanoscale spin waves.
Authors
- Maiko Kofu (ORCID: https://orcid.org/0000-0003-3756-2157)
- Yan‐Zhen Zheng (ORCID: https://orcid.org/0000-0003-4056-097X)
- Jiewei Deng (ORCID: https://orcid.org/0000-0002-5393-8823)
- Zhendong Fu (ORCID: https://orcid.org/0000-0002-2641-9243)
- Jinkui Zhao (ORCID: https://orcid.org/0000-0002-7756-1952)
- Yuan-Qi Zhai
- Hanjie Guo (ORCID: https://orcid.org/0000-0001-6203-5557)
- Bo‐Kai Ling (ORCID: https://orcid.org/0000-0002-8732-0810)
- Ming Chang
Institutions
- Japan Atomic Energy Agency (JP)
- Guangdong University of Technology (CN)
- Northwestern Polytechnical University (CN)
- Chinese Academy of Sciences (CN)
- Japan Proton Accelerator Research Complex (JP)
- Songshan Lake Materials Laboratory (CN)
- FZU ‒ Institute of Physics of the Academy of Sciences of the Czech Republic (CZ)
- Institute of Physics (CN)
- National Laboratory for Superconductivity (CN)
- Great Bay University
- Xi'an Jiaotong University (CN)
- Ministry of Industry and Information Technology (CN)
Publication Details
- Journal
- Journal of the American Chemical Society
- Published
- 2025-03-01
- DOI
- https://doi.org/10.1021/jacs.4c13628
- Citations
- 6
- Primary Topic
- Magnetism in coordination complexes
- Type
- article
- Field-Weighted Citation Impact
- 2.56
Funders
- National Natural Science Foundation of China
- Xi’an Jiaotong University
- Xi'an Municipal Bureau of Science and Technology
- State Key Laboratory of Electrical Insulation and Power Equipment
- National Key Research and Development Program of China
- Project 211
- Fundamental Research Funds for the Central Universities
- Shaanxi Key Science and Technology Innovation Team Project
- Natural Science Foundation of Guangdong Province for Distinguished Young Scholars
- Basic and Applied Basic Research Foundation of Guangdong Province