Study and tailoring spin dynamic properties of CoFeB during rapid thermal annealing

Yaping Zhang, Xin Fan, Weigang Wang, Xiaoming Kou, Rong Cao, Xing Chen, Chaoying Ni, Liqing Pan, John Q. Xiao

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

We studied the real-time evolution of magnetic dynamic and static properties of 20 nm CoFeB thin film during annealing at 380 °C. The ferromagnetic resonance linewidth quickly reduces by 30% within 300 s annealing, and monotonically increases upon longer annealing. The magnetic static coercivity shows similar trend. The underlying physical relation between linewidth and anisotropy can be connected by the two-magnon scattering theory. By doping of Nb into CoFeB films, the damping was maintained at a low value within 2000 s annealing. This method to tailor the dynamic properties of CoFeB may benefit the development of magnetics and spintronics based microwave devices.

Original languageEnglish (US)
Article number042506
JournalApplied Physics Letters
Volume98
Issue number4
DOIs
StatePublished - Jan 24 2011
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    Zhang, Y., Fan, X., Wang, W., Kou, X., Cao, R., Chen, X., Ni, C., Pan, L., & Xiao, J. Q. (2011). Study and tailoring spin dynamic properties of CoFeB during rapid thermal annealing. Applied Physics Letters, 98(4), [042506]. https://doi.org/10.1063/1.3549188