Evolution of structural and magnetic properties of Co-Fe based metallic glass thin films with thermal annealing

G. Pookat; H. Thomas; S. Thomas; S. H. Al-Harthi; L. Raghavan; I. A. Al-Omari; D. Sakthikumar; R. V. Ramanujan; M. R. Anantharaman

doi:10.1016/j.surfcoat.2013.09.055

Evolution of structural and magnetic properties of Co-Fe based metallic glass thin films with thermal annealing

G. Pookat, H. Thomas, S. Thomas, S. H. Al-Harthi, L. Raghavan, I. A. Al-Omari, D. Sakthikumar, R. V. Ramanujan, M. R. Anantharaman^*

^*Corresponding author for this work

Physics

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

Ultra thin films based on CoFe were prepared from a composite target employing thermal evaporation. The microstructure of the films was modified by thermal annealing. The relationship between microstructure and magnetic properties of the films was investigated using techniques like glancing angle X-ray diffraction (GXRD), transmission electron microscopy (TEM) and vibrating sample magnetometry (VSM). The GXRD and TEM investigations showed an onset of crystallization of CoFe at around 373. K. The magnetic softness of the films improved with thermal annealing but at higher annealing temperature it is found to be deteriorating. Annealing induced modification of surface morphology of the alloy thin films was probed by atomic force microscopy (AFM). Surface smoothening was observed with thermal annealing and the observed magnetic properties correlate well with surface modifications induced by thermal annealing.

Original language	English
Pages (from-to)	246-251
Number of pages	6
Journal	Surface and Coatings Technology
Volume	236
DOIs	https://doi.org/10.1016/j.surfcoat.2013.09.055
Publication status	Published - Dec 15 2013

Keywords

CoFe based thin films
Nanocrystallization
Surface smoothening
Thermal annealing

ASJC Scopus subject areas

Chemistry(all)
Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/j.surfcoat.2013.09.055

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title = "Evolution of structural and magnetic properties of Co-Fe based metallic glass thin films with thermal annealing",

abstract = "Ultra thin films based on CoFe were prepared from a composite target employing thermal evaporation. The microstructure of the films was modified by thermal annealing. The relationship between microstructure and magnetic properties of the films was investigated using techniques like glancing angle X-ray diffraction (GXRD), transmission electron microscopy (TEM) and vibrating sample magnetometry (VSM). The GXRD and TEM investigations showed an onset of crystallization of CoFe at around 373. K. The magnetic softness of the films improved with thermal annealing but at higher annealing temperature it is found to be deteriorating. Annealing induced modification of surface morphology of the alloy thin films was probed by atomic force microscopy (AFM). Surface smoothening was observed with thermal annealing and the observed magnetic properties correlate well with surface modifications induced by thermal annealing.",

keywords = "CoFe based thin films, Nanocrystallization, Surface smoothening, Thermal annealing",

author = "G. Pookat and H. Thomas and S. Thomas and Al-Harthi, {S. H.} and L. Raghavan and Al-Omari, {I. A.} and D. Sakthikumar and Ramanujan, {R. V.} and Anantharaman, {M. R.}",

note = "Funding Information: GP acknowledges University Grants Commission (UGC), India for providing financial assistance in the form of RFSMS fellowship (No. F4-3/2006(BSR)/8-3/2007(BSR) ). HT acknowledges UGC FDP for providing financial assistance. Dr. I. A. Al–Omari would like to thank Sultan Qaboos University for the support under the grant number IG/SCI/PHYS/12/02 . LR & MRA are thankful to Inter University Accelerator Centre (IUAC), New Delhi for providing financial assistance in the form of UFUP project. MRA acknowledges Department of Science and Technology (DST)—Nanomission (No. SR/NM/NS-120/2010 (G) ) and DST-DAAD ( INT/FRG/DAAD/P-207/2011 ) for providing necessary facilities and financial assistance.",

year = "2013",

month = dec,

day = "15",

doi = "10.1016/j.surfcoat.2013.09.055",

language = "English",

volume = "236",

pages = "246--251",

journal = "Surface and Coatings Technology",

issn = "0257-8972",

publisher = "Elsevier",

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TY - JOUR

T1 - Evolution of structural and magnetic properties of Co-Fe based metallic glass thin films with thermal annealing

AU - Pookat, G.

AU - Thomas, H.

AU - Thomas, S.

AU - Al-Harthi, S. H.

AU - Raghavan, L.

AU - Al-Omari, I. A.

AU - Sakthikumar, D.

AU - Ramanujan, R. V.

AU - Anantharaman, M. R.

N1 - Funding Information: GP acknowledges University Grants Commission (UGC), India for providing financial assistance in the form of RFSMS fellowship (No. F4-3/2006(BSR)/8-3/2007(BSR) ). HT acknowledges UGC FDP for providing financial assistance. Dr. I. A. Al–Omari would like to thank Sultan Qaboos University for the support under the grant number IG/SCI/PHYS/12/02 . LR & MRA are thankful to Inter University Accelerator Centre (IUAC), New Delhi for providing financial assistance in the form of UFUP project. MRA acknowledges Department of Science and Technology (DST)—Nanomission (No. SR/NM/NS-120/2010 (G) ) and DST-DAAD ( INT/FRG/DAAD/P-207/2011 ) for providing necessary facilities and financial assistance.

PY - 2013/12/15

Y1 - 2013/12/15

N2 - Ultra thin films based on CoFe were prepared from a composite target employing thermal evaporation. The microstructure of the films was modified by thermal annealing. The relationship between microstructure and magnetic properties of the films was investigated using techniques like glancing angle X-ray diffraction (GXRD), transmission electron microscopy (TEM) and vibrating sample magnetometry (VSM). The GXRD and TEM investigations showed an onset of crystallization of CoFe at around 373. K. The magnetic softness of the films improved with thermal annealing but at higher annealing temperature it is found to be deteriorating. Annealing induced modification of surface morphology of the alloy thin films was probed by atomic force microscopy (AFM). Surface smoothening was observed with thermal annealing and the observed magnetic properties correlate well with surface modifications induced by thermal annealing.

AB - Ultra thin films based on CoFe were prepared from a composite target employing thermal evaporation. The microstructure of the films was modified by thermal annealing. The relationship between microstructure and magnetic properties of the films was investigated using techniques like glancing angle X-ray diffraction (GXRD), transmission electron microscopy (TEM) and vibrating sample magnetometry (VSM). The GXRD and TEM investigations showed an onset of crystallization of CoFe at around 373. K. The magnetic softness of the films improved with thermal annealing but at higher annealing temperature it is found to be deteriorating. Annealing induced modification of surface morphology of the alloy thin films was probed by atomic force microscopy (AFM). Surface smoothening was observed with thermal annealing and the observed magnetic properties correlate well with surface modifications induced by thermal annealing.

KW - CoFe based thin films

KW - Nanocrystallization

KW - Surface smoothening

KW - Thermal annealing

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JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

ER -

Evolution of structural and magnetic properties of Co-Fe based metallic glass thin films with thermal annealing

Abstract

Keywords

ASJC Scopus subject areas

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