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RESEARCH PRODUCT
Effect of annealing on Co2FeAl0.5Si0.5thin films: A magneto-optical and x-ray absorption study
Burkard HillebrandsWenhong WangGeorg WolfKoichiro InomataHiroaki SukegawaP. KlaerHans-joachim ElmersM. KallmayerJaroslav HamrleSimon Trudelsubject
Materials scienceCondensed matter physicsAbsorption spectroscopybusiness.industryAnnealing (metallurgy)Magnetic circular dichroismCondensed Matter PhysicsLight scatteringElectronic Optical and Magnetic MaterialsBrillouin zoneCondensed Matter::Materials ScienceMagnetizationSpin waveCondensed Matter::SuperconductivityOptoelectronicsbusinessAnisotropydescription
A series of Al and MgO-capped Co${}_{2}$FeAl${}_{0.5}$Si${}_{0.5}$ epitaxial thin films grown on MgO with various levels of L2${}_{1}$ ordering was obtained by in situ annealing. The films were studied by means of x-ray absorption spectroscopy, x-ray magnetic circular dichroism (XMCD), magneto-optical Kerr effect magnetometry, and Brillouin light scattering. We find the anisotropy constants decrease, while the spin wave stiffness increases as the samples are annealed to higher temperatures. The magnetization as determined by Brillouin light scattering reveals a maximum value at intermediate annealing temperatures. Surprisingly, the orbital-to-spin-moment ratio (as seen from XMCD) is essentially stable through the sample series and does not change upon annealing, despite the observed changes in anisotropy and exchange.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-03-21 | Physical Review B |