Evolution of ferromagnetic and spin-wave resonances with crystalline order in thin films of full-Heusler alloy Co2MnSi
IR@NPL: CSIR-National Physical Laboratory, New Delhi
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| Title |
Evolution of ferromagnetic and spin-wave resonances with crystalline order in thin films of full-Heusler alloy Co2MnSi
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| Creator |
Pandey, Himanshu
Joshi, P. C. Pant, R. P. Prasad, R. Auluck, S. Budhani, R. C. |
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| Subject |
Applied Physics/Condensed Matter
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| Description |
We report the evolution of magnetic moment as well as magnetic anisotropy with crystalline order in Co2MnSi thin films grown on (100) MgO by pulsed laser deposition. The films become more ordered as the annealing temperature (T-A) increases from 400 to 600 degrees C. The extent of L2(1) ordering in the films annealed at 600 degrees C is approximate to 96%. The static magnetization measurements by vibrating sample magnetometry shows a maximum moment of 4.95 mu(B) per formula unit with low coercivity (H-C approximate to 65 Oe) in the films annealed at 600 degrees C. A rigorous analysis of the azimuthal and polar angle dependent ferromagnetic resonance (FMR) measured at several temperatures allows determination of various anisotropy fields relevant to our system as a function of T-A. Finally, we have evaluated the exchange stiffness constant down to 100 K using spin wave modes in FMR spectra. We have also estimated the exchange energies as well as stiffness constant by ab initio calculations using the Korringa-Kohn-Rostoker method.
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| Publisher |
American Institute of Physics
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| Date |
2012-01-15
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://npl.csircentral.net/3574/1/Evolution%20of%20ferromagnetic%20and%20spin-wave.pdf
Pandey, Himanshu and Joshi, P. C. and Pant, R. P. and Prasad, R. and Auluck, S. and Budhani, R. C. (2012) Evolution of ferromagnetic and spin-wave resonances with crystalline order in thin films of full-Heusler alloy Co2MnSi. Journal of Applied Physics , 111 (2). 023912-023919. ISSN 0021-8979 |
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| Relation |
http://npl.csircentral.net/3574/
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