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Journal article
Interphase exchange coupling in Fe ∕ Sm - Co bilayers with gradientFe thickness
Journal of applied physics, v 98(6), 063908
30 Sep 2005
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Abstract
We have fabricated Fe / Sm - Co bilayers with gradient Fe thicknesses in order to systematically study the dependence of exchange coupling on the thickness of the Fe layer. The Fe layer was deposited at two different temperatures (150 and 300 C) to study the effect of deposition temperature on the exchange coupling. Magneto-optical Kerr effect and x-ray magnetic circular dichroism (XMCD) have been employed as nondestructive rapid characterization tools to map the magnetic properties of the gradient samples. Systematic enhancement in exchange coupling between the soft layer and the hard layer is observed as the soft layer thickness is decreased. Separate exchange couplings of the Fe layer with Co and Sm in the hard layer are revealed through measuring the element-specific hysteresis curves using XMCD. The single-phase-like magnetization reversal critical thickness increases from 12 nm for Fe deposited at 150 C to 24 nm for Fe deposited at 300 C, indicating an important role of the state of the interface in the exchange coupling.
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Details
- Title
- Interphase exchange coupling in Fe ∕ Sm - Co bilayers with gradientFe thickness
- Creators
- Ming-hui Yu - University of Maryland, College ParkJason Hattrick-Simpers - University of Maryland, College ParkIchiro Takeuchi - University of Maryland, College ParkJing Li - Georgia Institute of TechnologyZ Wang - Georgia Institute of TechnologyJ Liu - The University of Texas at ArlingtonS Lofland - Rowan UniversitySomdev Tyagi - Drexel UniversityJ Freeland - Argonne National LaboratoryD Giubertoni - Trentino Network (Italy)M Bersani - Trentino Network (Italy)M Anderle - Trentino Network (Italy)
- Publication Details
- Journal of applied physics, v 98(6), 063908
- Publisher
- American Institute of Physics
- Number of pages
- 4
- Grant note
- DMR 0231291 / NSF DMR 00-80008 / NSF DAAD19-03-1-0038 / DARPA
- Resource Type
- Journal article
- Academic Unit
- Physics
- Web of Science ID
- WOS:000232226000059
- Scopus ID
- 2-s2.0-26244455501
- Other Identifier
- 991019173556604721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Physics, Applied