Moura A R
Departamento de Física, Universidade Federal de Viçosa, 36570-900 Viçosa, Minas Gerais, Brazil.
J Phys Condens Matter. 2024 Aug 13;36(45). doi: 10.1088/1361-648X/ad69f0.
Antiferromagnetic (AF) compounds possess distinct characteristics that render them promising candidates for advancing the application of spin degree of freedom in computational devices. For instance, AF materials exhibit minimal susceptibility to external magnetic fields while operating at frequencies significantly higher than their ferromagnetic counterparts. However, despite their potential, there remains a dearth of understanding, particularly concerning certain aspects of AF spintronics. In particular, the properties of coherent states in AF materials have received insufficient investigation, with many features extrapolated directly from the ferromagnetic scenario. Addressing this gap, this study offers a comprehensive examination of AF coherent states, shedding new light on both AF and Spin-Flop phases. Employing the Holstein-Primakoff formalism, we conduct an in-depth analysis of resonating-driven coherent phases. Subsequently, we apply this formalism to characterize antiferromagnetic resonance, a pivotal phenomenon in spin-pumping experiments, and extract crucial insights therefrom.
反铁磁（AF）化合物具有独特的特性，使其成为推进自旋自由度在计算设备中应用的有前途的候选材料。例如，AF材料在比其铁磁对应物高得多的频率下运行时，对外加磁场的敏感性最小。然而，尽管它们具有潜力，但仍然缺乏理解，特别是关于AF自旋电子学的某些方面。特别是，AF材料中相干态的性质尚未得到充分研究，许多特性是直接从铁磁情况推断出来的。为了填补这一空白，本研究对AF相干态进行了全面考察，为AF相和自旋翻转相提供了新的见解。我们采用霍尔斯坦-普里马科夫形式主义，对共振驱动的相干相进行了深入分析。随后，我们应用这种形式主义来表征反铁磁共振，这是自旋泵浦实验中的一个关键现象，并从中提取关键见解。
