The Experts below are selected from a list of 249 Experts worldwide ranked by ideXlab platform
C. Vittoria - One of the best experts on this subject based on the ideXlab platform.
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microwave and magnetic properties of barium hexaferrite Films having the c axis in the Film Plane by liquid phase epitaxy technique
Journal of Applied Physics, 2003Co-Authors: Soack Dae Yoon, C. VittoriaAbstract:We report the growth of thick barium hexaferrite (BaFe12O19,BaM) Films on m-Planes ([11_00] or [101_0]) sapphire (Al2O3) substrates by the liquid phase epitaxy deposition technique. The procedure entailed the deposition of seed layers of BaFe12O19 onto the substrate by the pulsed laser ablation deposition and then dipping the substrate into a molten flux for 2 h. The total thickness ranged from 60 μm to 200 μm. The vibrating sample magnetometer (VSM) measurement data showed that the Film exhibited magnetic uniaxial anisotropy axis in the Film Plane. The coercive field was relatively small, range of Hc was from 0.007 kOe to 0.08 kOe, and the saturation magnetization (4πMs)≅4.42 kG. The ferrimagnetic resonance (FMR) linewidth (ΔH) at 59.9 GHz was ∼0.08 kOe. This value of ΔH should be contrasted with previous FMR linewidth measurement of Films deposited by the PLD technique which showed a ΔH of ∼1.20 kOe.
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Magnetic and microwave magnetic properties of barium hexaferrite permanent magnet Films having the c-axis in the Film Plane
Journal of Applied Physics, 2003Co-Authors: Soack Dae Yoon, C. Vittoria, S. A. OliverAbstract:Thick (1–14 μm) Films of ferrimagnetic barium hexaferrite (BaFe12O19 or BaM) having the c-axis ([0001]) in the Film Plane were deposited by pulsed laser deposition onto a-Plane (112¯0) sapphire (Al2O3) substrates, and were found to have a (101¯0) orientation. Torque and magnetization measurements show these Films are permanent magnets with easy magnetization direction in the Plane of the Film. Ferrimagnetic resonance (FMR) spectra exhibited linewidths of 1.00–1.40 kOe, where low-field FMR measurements do not show uniform mode broadening due to the formation of multiple domains. All Film parameters were affected by the large stress present in these Films due to crystallographic and thermal mismatches. These Films have dual functionality as gyrotropic media and permanent magnets, and are usable as either nonreciprocal microwave devices or biasing magnets.
Soack Dae Yoon - One of the best experts on this subject based on the ideXlab platform.
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microwave and magnetic properties of barium hexaferrite Films having the c axis in the Film Plane by liquid phase epitaxy technique
Journal of Applied Physics, 2003Co-Authors: Soack Dae Yoon, C. VittoriaAbstract:We report the growth of thick barium hexaferrite (BaFe12O19,BaM) Films on m-Planes ([11_00] or [101_0]) sapphire (Al2O3) substrates by the liquid phase epitaxy deposition technique. The procedure entailed the deposition of seed layers of BaFe12O19 onto the substrate by the pulsed laser ablation deposition and then dipping the substrate into a molten flux for 2 h. The total thickness ranged from 60 μm to 200 μm. The vibrating sample magnetometer (VSM) measurement data showed that the Film exhibited magnetic uniaxial anisotropy axis in the Film Plane. The coercive field was relatively small, range of Hc was from 0.007 kOe to 0.08 kOe, and the saturation magnetization (4πMs)≅4.42 kG. The ferrimagnetic resonance (FMR) linewidth (ΔH) at 59.9 GHz was ∼0.08 kOe. This value of ΔH should be contrasted with previous FMR linewidth measurement of Films deposited by the PLD technique which showed a ΔH of ∼1.20 kOe.
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Magnetic and microwave magnetic properties of barium hexaferrite permanent magnet Films having the c-axis in the Film Plane
Journal of Applied Physics, 2003Co-Authors: Soack Dae Yoon, C. Vittoria, S. A. OliverAbstract:Thick (1–14 μm) Films of ferrimagnetic barium hexaferrite (BaFe12O19 or BaM) having the c-axis ([0001]) in the Film Plane were deposited by pulsed laser deposition onto a-Plane (112¯0) sapphire (Al2O3) substrates, and were found to have a (101¯0) orientation. Torque and magnetization measurements show these Films are permanent magnets with easy magnetization direction in the Plane of the Film. Ferrimagnetic resonance (FMR) spectra exhibited linewidths of 1.00–1.40 kOe, where low-field FMR measurements do not show uniform mode broadening due to the formation of multiple domains. All Film parameters were affected by the large stress present in these Films due to crystallographic and thermal mismatches. These Films have dual functionality as gyrotropic media and permanent magnets, and are usable as either nonreciprocal microwave devices or biasing magnets.
S. A. Oliver - One of the best experts on this subject based on the ideXlab platform.
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Magnetization behavior of scandium-substituted barium hexaferrite Films having uniaxial axis in the Film Plane
Journal of Magnetism and Magnetic Materials, 2003Co-Authors: S. D. Yoon, Carmine Vittoria, S. A. OliverAbstract:Abstract Highly oriented Films of ( 1 0 1 0 ) BaSc0.6Fe11.4O19 having the magnetic easy axis (crystallographic [0 0 0 1] axis) in the Film Plane were deposited by pulsed laser deposition onto a-Plane ( 1 1 2 0 ) sapphire (Al2O3) substrates. Magnetometry and torque magnetometry measurements showed in-Plane permanent magnet (magnetic dipole) behavior below a coercive field value of 450 Oe, while high field measurements yielded a uniaxial anisotropy field value of 10 kOe. Measurements at temperatures from 123 to 650 K showed the uniaxial anisotropy field was insensitive to temperature for T
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Magnetic and microwave magnetic properties of barium hexaferrite permanent magnet Films having the c-axis in the Film Plane
Journal of Applied Physics, 2003Co-Authors: Soack Dae Yoon, C. Vittoria, S. A. OliverAbstract:Thick (1–14 μm) Films of ferrimagnetic barium hexaferrite (BaFe12O19 or BaM) having the c-axis ([0001]) in the Film Plane were deposited by pulsed laser deposition onto a-Plane (112¯0) sapphire (Al2O3) substrates, and were found to have a (101¯0) orientation. Torque and magnetization measurements show these Films are permanent magnets with easy magnetization direction in the Plane of the Film. Ferrimagnetic resonance (FMR) spectra exhibited linewidths of 1.00–1.40 kOe, where low-field FMR measurements do not show uniform mode broadening due to the formation of multiple domains. All Film parameters were affected by the large stress present in these Films due to crystallographic and thermal mismatches. These Films have dual functionality as gyrotropic media and permanent magnets, and are usable as either nonreciprocal microwave devices or biasing magnets.
V. L. Volkov - One of the best experts on this subject based on the ideXlab platform.
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51V NMR of inclusion compounds H2V12O31-y·n H2O
Journal of Inclusion Phenomena and Macrocyclic Chemistry, 1991Co-Authors: A. V. Dmitriev, S. G. Arsenov, V. L. VolkovAbstract:The parameters of hyperfine interactions on51V nuclei were determined on Films of the inclusion compound H2V12O31-y·n H2O at different stages of hydration. It was established that the axial symmetry Plane of the magnetic interaction tensor coincides with the Film Plane. The most probable direction (40° of the Film Plane) and the magnitude of the electric field gradient (EFG) on51V nuclei (egQ/h = 0.233 MHz) were found for a completely dehydrated sample. An analysis of the line width angular dependences of satellites has shown the existence of a disorientation of the main EFG direction with a distribution width of about 50° in the Film Plane. The absence of satellites and the presence of an angular dependence of the51V NMR central signal of hydrated samples allowed the conclusion that the interaction of the V-O layer with molecules of water led to an increase in the disorientation of the Film Plane.
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51V NMR of Inclusion Compounds H2V12031 _yOK/H20
1991Co-Authors: A. V. Dmitriev, S. G. Arsenov, V. L. VolkovAbstract:The parameters of hyperfine interactions on 51V nuclei were determined on Films of the inclusion compound H2VI2031 _y.n H20 at different stages of hydration. It was established that the axial symmetry Plane of the magnetic interaction tensor coincides with the Film Plane. The most probable direction (40 ° of the Film Plane) and the magnitude of the electric field gradient (EFG) on 51V nuclei (eqQ/h = 0.233 MHz) were found for a completely dehydrated sample. An analysis of the line width angular dependences of satellites has shown the existence of a disorientation of the main EFG direction with a distribution width of about 50 ° in the Film Plane. The absence of satellites and the presence of an angular dependence of the 51V NMR central signal of hydrated samples allowed the conclusion that the interaction of the V--O layer with molecules of water led to an increase in the disorientation of the Film Plane.
Sun Zhuo - One of the best experts on this subject based on the ideXlab platform.
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Giant Magnetostriction and magnetic properties of amorphous Tb/Fe/Dy and Fe/Tb/Fe/Dy nano-multilayer Films
Journal of Functional Materials and Devices, 2020Co-Authors: Sun ZhuoAbstract:Giant magnetostriction effect and magnetic properties of the amorphous alternant Tb/Fe/Dy(sample A) and Fe/Tb/Fe/Dy(sample B) nano-multilayer Films had been studied.The magnetic hysteresis loops show that sample B has better magnetic properties than sample A,and easy magnetic direction changes from perpendicular to the Film Plane(sample A) to parallel to the Film Plane(sample B).The sample B has good low-field giant magnetostriction,and it is five times higher than sample A at H=0.12T from 16ppm to 82ppm.
