Laser assisted crystallization of ferromagnetic amorphous ribbons: A multimodal characterization and thermal model study

Shravana Katakam, Arun Devaraj, Mark Bowden, S. Santhanakrishnan, Casey Smith, R. V. Ramanujan, Thevuthasan Suntharampillai, Rajarshi Banerjee, Narendra B. Dahotre

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

This paper focuses on laser-based de-vitrification of amorphous soft magnetic Fe-Si-B ribbons and its consequent influence on the magnetic properties. Laser processing resulted in a finer scale of crystallites due to rapid heating and cooling during laser annealing compared to conventional furnace annealing process. A significant increase in saturation magnetization is observed for laser-annealed ribbons compared to both as-received and furnace annealed samples coupled with an increase in coercivity compared to the as received samples. The combined effect of thermal histories and stresses developed during laser annealing results in the formation of nano-crystalline phase along the laser track. The phase evolution is studied by micro-XRD and TEM analysis. Solute partitioning and compositional variation within the phases are obtained by Local Electrode Atom probe analysis. The evolution of microstructure is rationalized using a Finite Element based heat transfer multi-physics model.

Original languageEnglish
Article number184901
JournalJournal of Applied Physics
Volume114
Issue number18
DOIs
Publication statusPublished - 14 Nov 2013
Externally publishedYes

Fingerprint

ribbons
crystallization
laser annealing
lasers
furnaces
vitrification
crystallites
coercivity
solutes
heat transfer
histories
magnetic properties
saturation
cooling
magnetization
transmission electron microscopy
microstructure
physics
annealing
heating

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Katakam, S., Devaraj, A., Bowden, M., Santhanakrishnan, S., Smith, C., Ramanujan, R. V., ... Dahotre, N. B. (2013). Laser assisted crystallization of ferromagnetic amorphous ribbons: A multimodal characterization and thermal model study. Journal of Applied Physics, 114(18), [184901]. https://doi.org/10.1063/1.4829279

Laser assisted crystallization of ferromagnetic amorphous ribbons : A multimodal characterization and thermal model study. / Katakam, Shravana; Devaraj, Arun; Bowden, Mark; Santhanakrishnan, S.; Smith, Casey; Ramanujan, R. V.; Suntharampillai, Thevuthasan; Banerjee, Rajarshi; Dahotre, Narendra B.

In: Journal of Applied Physics, Vol. 114, No. 18, 184901, 14.11.2013.

Research output: Contribution to journalArticle

Katakam, S, Devaraj, A, Bowden, M, Santhanakrishnan, S, Smith, C, Ramanujan, RV, Suntharampillai, T, Banerjee, R & Dahotre, NB 2013, 'Laser assisted crystallization of ferromagnetic amorphous ribbons: A multimodal characterization and thermal model study', Journal of Applied Physics, vol. 114, no. 18, 184901. https://doi.org/10.1063/1.4829279
Katakam, Shravana ; Devaraj, Arun ; Bowden, Mark ; Santhanakrishnan, S. ; Smith, Casey ; Ramanujan, R. V. ; Suntharampillai, Thevuthasan ; Banerjee, Rajarshi ; Dahotre, Narendra B. / Laser assisted crystallization of ferromagnetic amorphous ribbons : A multimodal characterization and thermal model study. In: Journal of Applied Physics. 2013 ; Vol. 114, No. 18.
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