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Element-specific ferromagnetic resonance in epitaxial Heusler spin valve systems
Time-resolved x-ray magnetic circular dichroism was used to investigate epitaxial MgO(100)/Co 2 Cr 0.6 Fe 0.4 Al and MgO(100)/Co 2 Cr 0.6 Fe 0.4 Al/Cr/CoFe films. The precessional motion of the individual sublattice magnetization, excited by continuous microwave excitation in the range 2–10 GHz, was...
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Published in: | Journal of physics. D, Applied physics Applied physics, 2011-10, Vol.44 (42), p.425004-1-6 |
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Main Authors: | , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Time-resolved x-ray magnetic circular dichroism was used to investigate epitaxial MgO(100)/Co
2
Cr
0.6
Fe
0.4
Al and MgO(100)/Co
2
Cr
0.6
Fe
0.4
Al/Cr/CoFe films. The precessional motion of the individual sublattice magnetization, excited by continuous microwave excitation in the range 2–10 GHz, was detected by tuning the x-ray photon energy to the
L
3
absorption edges of Cr, Fe and Co. The relative phase angle of the sublattice magnetization's response is smaller than the detection limit of 2°. A weakly antiferromagnetically coupled CoFe layer causes an increase in the ferromagnetic resonance linewidth consisting of a constant offset and a component linearly increasing with frequency that we partly attribute to non-local damping due to spin pumping. |
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ISSN: | 0022-3727 1361-6463 |
DOI: | 10.1088/0022-3727/44/42/425004 |