Ukleev Victor, Baral Priya R, Cubitt Robert, Steinke Nina-Juliane, Magrez Arnaud, Utesov Oleg I
Helmholtz-Zentrum Berlin für Materialien und Energie, D-12489 Berlin, Germany.
Department of Applied Physics and Quantum-Phase Electronics Center, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan.
Struct Dyn. 2025 Jul 18;12(4):044301. doi: 10.1063/4.0000305. eCollection 2025 Jul.
The insulating chiral magnet CuOSeO exhibits a rich array of low-temperature magnetic phenomena, making it a prime candidate for the study of its spin dynamics. Using spin wave small-angle neutron scattering (SWSANS), we systematically investigated the temperature-dependent behavior of the helimagnon excitations in the field-polarized phase of CuOSeO. Our measurements, spanning 5-55 K, reveal the temperature evolution of spin-wave stiffness and damping constant with unprecedented resolution, facilitated by the insulating nature of CuOSeO. These findings align with theoretical predictions and resolve discrepancies observed in previous studies, emphasizing the enhanced sensitivity of the SWSANS method. The results provide deeper insights into the fundamental magnetic properties of CuOSeO, contributing to a broader understanding of chiral magnets.
绝缘手性磁体CuOSeO展现出一系列丰富的低温磁现象，使其成为研究其自旋动力学的理想候选材料。利用自旋波小角中子散射（SWSANS），我们系统地研究了CuOSeO场极化相中螺旋磁子激发随温度的变化行为。我们在5 - 55 K范围内的测量以前所未有的分辨率揭示了自旋波刚度和阻尼常数随温度的演变，这得益于CuOSeO的绝缘性质。这些发现与理论预测相符，并解决了先前研究中观察到的差异，强调了SWSANS方法的更高灵敏度。结果为深入了解CuOSeO的基本磁性质提供了见解，有助于对手性磁体有更广泛的理解。
