论文标题
Fermi水平控制的超快消灭机制中的半金属合金合金
Fermi Level Controlled Ultrafast Demagnetization Mechanism in Half-Metallic Heusler Alloy
论文作者
论文摘要
CO2FEXMN1-XSI Heusler合金中的电子带结构控制的超快速反电磁机理的基础是组成的系统变化。我们发现，在费米水平上由状态的自旋密度控制的自旋叉散射率是导致超快消灭时间（τm）的非单调变化，x最大为x = 0.4。此外，由于带间散射机制的优势，吉尔伯特抑制常数与τm表现出与τm的反相关关系。这建立了基于费米水平位置的超快自旋动力学的统一机制。
The electronic band structure-controlled ultrafast demagnetization mechanism in Co2FexMn1-xSi Heusler alloy is underpinned by systematic variation of composition. We find the spin-flip scattering rate controlled by spin density of states at Fermi level is responsible for non-monotonic variation of ultrafast demagnetization time (τM) with x with a maximum at x = 0.4. Furthermore, Gilbert damping constant exhibits an inverse relationship with τM due to the dominance of inter-band scattering mechanism. This establishes a unified mechanism of ultrafast spin dynamics based on Fermi level position.
