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Updated: May 16, 2025

High-Temperature and High-Pressure In situ Magic Angle Spinning Nuclear Magnetic Resonance Spectroscopy
Published on: October 9, 2020
Quantum Spin Wave Excited from a Cr-Dy Single-Molecule Magnet
Bo-Kai Ling1,2, Ming Chang1, Yuan-Qi Zhai1
1Frontier Institute of Science and Technology, Interdisciplinary Research Center of Frontier Science and Technology, State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Key Laboratory of Electronic Devices and Material Chemistry, School of Chemistry, Xi'an Jiaotong University, Xi'an, Shaanxi 710054, P. R. China.
Abstract:
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 Dy4Cr2(μ3-F)2(mdea)3(piv)10, which shows a large ferrimagnetic ground moment with a restricted quantum tunneling gap (<3.8 × 10-7 cm-1) up to nine levels, leading to an axial anisotropic energy barrier of 12 cm-1 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 L&E-band theory with Δ/2 = 2.08 cm-1 and ε(q) = 2.5 cm-1, providing unambiguous evidence for nanoscale spin waves.
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