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Full-Text Articles in Engineering
Ferromagnetic Resonance Measurements On Epitaxial Grown Fe/Znse And Co/Znse Films On Gaas Substrates, S. A. Oliver, C. Vittoria, J. J. Krebs, B. T. Jonker, G. A. Prinz
Ferromagnetic Resonance Measurements On Epitaxial Grown Fe/Znse And Co/Znse Films On Gaas Substrates, S. A. Oliver, C. Vittoria, J. J. Krebs, B. T. Jonker, G. A. Prinz
Carmine Vittoria
Ferromagnetic resonance (FMR) measurements have been performed over a broad frequency range on epitaxial films of Co and bcc α‐Fe grown onto epilayers of ZnSe by molecular‐beam‐epitaxy techniques on (001) and (110) GaAs substrates. In‐plane and perpendicular FMR results were used in deducing the magnetic parameters and spin‐wave resonance (SWR) dispersion of the films. The magnetic parameters deduced for Fe films agree with previous results obtained on the (001) Fe/ZnSe film. Well‐resolved SWR modes were observed in the Fe/ZnSe films, allowing extraction of the exchange stiffness constant. Few spin‐wave excitations were observed for the Co/ZnSe films. Both (110) Fe/ZnSe and …
Growth And Characterization Of Thick Oriented Barium Hexaferrite Films On Mgo (111) Substrates, S. A. Oliver, S. D. Yoon, I Kozulin, M. L. Chen, C. Vittoria
Growth And Characterization Of Thick Oriented Barium Hexaferrite Films On Mgo (111) Substrates, S. A. Oliver, S. D. Yoon, I Kozulin, M. L. Chen, C. Vittoria
Carmine Vittoria
Highly oriented films of BaFe₁₂O₁₉ have been deposited onto MgO (111) substrates by pulsed laser ablation deposition. In contrast to epitaxial BaFe₁₂O₁₉ films grown on Al₂O₃ (001) substrates, these films experience an in-plane biaxial compressive stress, and do not crack or delaminate to thicknesses of at least 28 μm. X-ray diffraction, magnetometry, torque magnetometry, and ferrimagnetic resonance results all indicate excellent c-axis orientation normal to the film plane, and magnetic properties comparable to bulk values. The thickness and properties of these films approach those required for applications in low-loss self-biased nonreciprocal microwave devices
Pulsed Laser Deposition Of Epitaxial Bafe₁₂O₁₉ Thin-Films, C. A. Carosella, D. B. Chrisey, P. Lubitz, J. S. Horwitz, P. Dorsey, R. Seed, C. Vittoria
Pulsed Laser Deposition Of Epitaxial Bafe₁₂O₁₉ Thin-Films, C. A. Carosella, D. B. Chrisey, P. Lubitz, J. S. Horwitz, P. Dorsey, R. Seed, C. Vittoria
Carmine Vittoria
Epitaxial thin films of barium hexaferrite (BaFe₁₂O₁₉) have been fabricated by the pulsed laser deposition technique on basal plane sapphire. Structural studies reveal the films to be predominantly single phase and crystalline, with the c axis oriented perpendicular to the film plane. The magnetic parameters deduced from vibrating sample magnetometer and ferromagnetic resonance (FMR) measurements are close to the parameters associated with bulk materials. Post annealing of the films reduced the FMR linewidth by more than a factor of 3 so that it compares reasonably well with single-crystal films. The derivative FMR linewidth was measured to be 66 Oe at …