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

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

doi:10.1063/1.4829279

Cited by 27 publications

(15 citation statements)

References 39 publications

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“…A proper heat treatment that leads to nanocrystallization is difficult to achieve due to the simultaneous formation and growth of a crystalline phase which is characterized by harder magnetic properties than amorphous materials (Ref 8). Several unconventional techniques have been investigated to obtain nanostructured alloys (Ref [9][10][11][12][13][14]. The pulsed laser interference process is based on the interference of at least two laser beams.…”

Section: Introductionmentioning

confidence: 99%

Study of Structure and Properties of Fe-Based Amorphous Ribbons after Pulsed Laser Interference Heating

Czyż

Kusiński

Radziszewska

et al. 2020

J. of Materi Eng and Perform

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The paper is devoted to the study of microstructural and magnetic properties of the Fe-based amorphous ribbons after interference pulsed laser heating. The ternary amorphous alloy FeSiB, as well as the multi-component alloys FeCuSiB and FeCuNbSiB, was subjected to laser pulses to induce crystallization in many microislands simultaneously. Structure and properties changes occurred in laser-heated dots. Detailed TEM analysis from a single dot shows the presence of FeSi(α) nanocrystals in the amorphous matrix. The FeSiB alloy is characterized after conventional crystallization by a dendritic structure; however, the alloys with copper as well copper and niobium additions are characterized by the formation of equiaxed crystals in the amorphous matrix. Amorphous alloys before and after the laser heating are soft magnetic; however, conventional crystallization leads to a deterioration of the soft magnetic properties of the material.

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Section: Introductionmentioning

confidence: 99%

Study of Structure and Properties of Fe-Based Amorphous Ribbons after Pulsed Laser Interference Heating

Czyż

Kusiński

Radziszewska

et al. 2020

J. of Materi Eng and Perform

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“…Other modeling assumptions were: (i) the material was isotropic and opaque, (ii) if any material was evaporated/ablated, it was considered to be transparent and did not interfere with the incident laser beam, and (iii) multiple reflections of laser radiation within the laser-material interaction zone are neglected. The further details of mathematical formulation and logic behind the current model can be found in the previous publications [20][21][22][23][24][25]. The multiphysics computational model incorporating the above predicted approach the temperature profile as a function of time.…”

Section: Magnetic Propertiesmentioning

confidence: 99%

“…The behavior and nature of this laser-induced nanocrystallization has been previously modeled and rationalized [20,21]. Furthermore, the laser devitrification process is site-specific, opening up many possibilities of designing patterned crystallized regions [23][24][25] that could lead to a wide array of composite functional applications.…”

Section: Introductionmentioning

confidence: 99%

“…Combination of these laser parameters resulted in laser fluence of 0.42 J/mm 2 . This particular set of laser processing parameters was chosen based on the past experience about the studies of laser thermal treated Fe based metallic glasses, reported in the previously published works [20,[22][23][24][25] by the present research group. Thin film transmission electron microscopy (TEM) samples and needle shaped atom probe tomography (APT) samples were prepared using an FEI Nova 200 focused ion beam system (FIB/SEM).…”

Section: Introductionmentioning

confidence: 99%

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Influence of niobium on laser de-vitrification of Fe–Si–B based amorphous magnetic alloys

Alam

Borkar

Joshi

et al. 2015

Journal of Non-Crystalline Solids

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Laser annealing of Fe 77.5 Si 13.5 B 9 and Fe 76.5 Si 13.5 B 9 Cu 1 amorphous melt-spun ribbons was carried out. In both alloys, it was found that devitrification occurred, leading to the nucleation of a high density of refined α-Fe(Si) nanocrystals within the amorphous matrix. Interestingly, when laser processed under identical conditions, Fe 74.5 Si 13.5 B 9 Nb 3 , and Fe 73.5 Si 13.5 B 9 Nb 3 Cu 1 (FINEMET) amorphous melt-spun ribbons did not exhibit devitrification or copper clustering. Differences in the magnetic properties were observed, with the Fe 77.5 Si 13.5 B 9 and Fe 76.5 Si 13.5 B 9 Cu 1 alloys exhibiting higher saturation magnetization (M S) and higher coercivity (H C) values while Fe 74.5 Si 13.5 B 9 Nb 3 , and Fe 73.5 Si 13.5 B 9 Nb 3 Cu 1 alloys exhibited lower values of both these properties. These results clearly reveal the enhanced stability of the amorphous phase due to the addition of Nb in Fe-Si-B based melt-spun samples.

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“…Laser annealing can play an important role in changing the surface topography, formation of nano-crystalline phases, production of surface oxidation and promotion of structural relaxation [15][16][17][18]. Subsequently, domain wall pinning and also the shape and structure of magnetic domains can be altered [16].…”

Section: Introductionmentioning

confidence: 98%

Influence of Laser-Induced Surface Morphology on the Magnetic Domains of CoFeSiB Amorphous Ribbons

Ghanaatshoar

Nabipour

2015

J Supercond Nov Magn

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To investigate the relationship between magnetic domain structure and morphology variations induced by laser processing, Co 68.15 Fe 4.35 Si 12.5 B 15 amorphous ribbons were irradiated by a 1064-nm pulsed Nd:YAG laser in air. The illumination was performed at various pulse repetition rates which as a key parameter can effectively change the morphology of ribbons. The morphology and magnetic domain structure changes were correlated with magnetic force microscopy. It was shown that depending on the pulse repetition rate, various surface morphologies can be induced, which in turn may cause transformation of magnetic domains, anisotropy induction, and also pinning of magnetic domain walls.

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

Abstract: Articles you may be interested inImpacts of amorphous and crystalline cobalt ferrite layers on the giant magneto-impedance response of a soft ferromagnetic amorphous ribbon

Cited by 27 publications

References 39 publications

Study of Structure and Properties of Fe-Based Amorphous Ribbons after Pulsed Laser Interference Heating

Study of Structure and Properties of Fe-Based Amorphous Ribbons after Pulsed Laser Interference Heating

Influence of niobium on laser de-vitrification of Fe–Si–B based amorphous magnetic alloys

Influence of Laser-Induced Surface Morphology on the Magnetic Domains of CoFeSiB Amorphous Ribbons

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