Fermi Level Controlled Ultrafast Demagnetization Mechanism in Half-Metallic Heusler Alloy

Santanu Pan, Takeshi Seki, Koki Takanashi, Anjan Barman

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
JournalUnknown Journal
Publication statusPublished - 2020 Jan 17

ASJC Scopus subject areas

  • General

Fingerprint Dive into the research topics of 'Fermi Level Controlled Ultrafast Demagnetization Mechanism in Half-Metallic Heusler Alloy'. Together they form a unique fingerprint.

Cite this