Khan Kacho Imtiyaz Ali, Kumar Akash, Gupta Pankhuri, Yadav Ram Singh, Åkerman Johan, Muduli Pranaba Kishor
Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India.
Applied Spintronics Group, Department of Physics, University of Gothenburg, Gothenburg, 412 96, Sweden.
Sci Rep. 2024 Feb 12;14(1):3487. doi: 10.1038/s41598-024-53621-z.
Fe[Formula: see text]Sn[Formula: see text] is a topological kagome ferromagnet that possesses numerous Weyl points close to the Fermi energy, which can manifest various unique transport phenomena such as chiral anomaly, anomalous Hall effect, and giant magnetoresistance. However, the magnetodynamic properties of Fe[Formula: see text]Sn[Formula: see text] have not yet been explored. Here, we report, for the first time, the measurements of the intrinsic Gilbert damping constant ([Formula: see text]), and the effective spin mixing conductance (g[Formula: see text]) of Pt/Fe[Formula: see text]Sn[Formula: see text] bilayers for Fe[Formula: see text]Sn[Formula: see text] thicknesses down to 2 nm, for which [Formula: see text] is [Formula: see text], and g[Formula: see text] is [Formula: see text]. The films have a high saturation magnetization, [Formula: see text], and large anomalous Hall coefficient, [Formula: see text]. The large values of g[Formula: see text], together with the topological properties of Fe[Formula: see text]Sn[Formula: see text], make Fe[Formula: see text]Sn[Formula: see text]/Pt bilayers useful heterostructures for the study of topological spintronic devices.
Fe₃Sn₂是一种拓扑 Kagome 铁磁体，在费米能量附近有许多外尔点，这会表现出各种独特的输运现象，如手征反常、反常霍尔效应和巨磁阻。然而，Fe₃Sn₂的磁动力学性质尚未得到研究。在此，我们首次报道了对于厚度低至 2 纳米的 Fe₃Sn₂的 Pt/Fe₃Sn₂双层膜的本征吉尔伯特阻尼常数（α）和有效自旋混合电导（g）的测量结果，其中α为[具体数值]，g 为[具体数值]。这些薄膜具有高饱和磁化强度（Ms）和大反常霍尔系数（R₀）。g 的较大值，连同 Fe₃Sn₂的拓扑性质一起，使得 Fe₃Sn₂/Pt 双层膜成为研究拓扑自旋电子器件的有用异质结构。
