Quantum Spin Wave Excited from a Cr–Dy Single-Molecule Magnet

IF 14.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Journal of the American Chemical Society Pub Date : 2025-03-01 DOI:10.1021/jacs.4c13628

Bo-Kai Ling, Ming Chang, Yuan-Qi Zhai, Jiewei Deng, Maiko Kofu, Hanjie Guo, Jinkui Zhao, Zhendong Fu, Yan-Zhen Zheng

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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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来源期刊

Journal of the American Chemical Society 化学-化学综合

CiteScore

24.40

自引率

6.00%

发文量

2398

审稿时长

1.6 months

期刊介绍： The flagship journal of the American Chemical Society, known as the Journal of the American Chemical Society (JACS), has been a prestigious publication since its establishment in 1879. It holds a preeminent position in the field of chemistry and related interdisciplinary sciences. JACS is committed to disseminating cutting-edge research papers, covering a wide range of topics, and encompasses approximately 19,000 pages of Articles, Communications, and Perspectives annually. With a weekly publication frequency, JACS plays a vital role in advancing the field of chemistry by providing essential research.