Origin of 'in-plane' and 'out-of-plane' magnetic anisotropies in as-deposited and annealed CoFeB ferromagnetic thin films
IR@NPL: CSIR-National Physical Laboratory, New Delhi
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| Title |
Origin of 'in-plane' and 'out-of-plane' magnetic anisotropies in as-deposited and annealed CoFeB ferromagnetic thin films
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| Creator |
Swamy, G. Venkat
Rakshit, R. K. Pant, R. P. Basheed, G. A. |
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| Subject |
Applied Physics/Condensed Matter
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| Description |
A detailed comparative Ferromagnetic resonance study of pulsed laser deposited Co40Fe40B20 thin films, before and after annealing, was under taken. The dependence of resonance field (H-res) and peak-to-peak linewidth (Delta H-pp) on film thickness, annealing temperature, and magnetic field orientation is examined. 'In-plane' (IP) and 'out-of-plane' (OP) angular dependence of the resonance fields, (IP:H-res(psi); OP:H-res(alpha)), were measured at T = 150 and 295K for the as deposited (as-) to annealed (an-) thin film samples to determine IP (H-K(parallel to)) and OP (H-K(perpendicular to)) uniaxial anisotropy fields. Variation of H-res(psi) and H-res(alpha) on sample geometry demonstrate that the uniaxial magnetic anisotropy is present in as-and an-thin films of Co40Fe40B20. The effective magnetic anisotropy (K-u(eff)) increases after nanocrystallization in CoFeB films indicates that the exchange interactions are unable to average out the local-magnetocrystalline anisotropy of the nanocrystalline grains and thereby lead to magnetic hardening in the early stages of crystallization.
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| Publisher |
AIP Publishing
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| Date |
2015-05-07
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://npl.csircentral.net/1936/1/243.pdf
Swamy, G. Venkat and Rakshit, R. K. and Pant, R. P. and Basheed, G. A. (2015) Origin of 'in-plane' and 'out-of-plane' magnetic anisotropies in as-deposited and annealed CoFeB ferromagnetic thin films. Journal of Applied Physics, 117 (17). ISSN 0021-8979 |
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| Relation |
http://npl.csircentral.net/1936/
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