Effect of magnetic field on the reconstruction of the defect-impurity state and сathodoluminescence in Si/SiO₂ structure

Impurity states in Si/SiO₂ structure have been studied using cathodoluminescence (CL). It has been found that intrinsic structure defects in Si/SiO2 are sensitive to the action of magnetic field, which can be revealed due to changes in Si/SiO₂ optical properties. The most sensitive to magnetic field (about 35 per cent) is the intensity of the 1.9 eV CL band attributed to non-bridge oxygen atoms

Magnetization spin dynamics in a (LuBi)(3)Fe5O12 (BLIG) epitaxial film

Bismuth substituted lutetium iron garnet (BLIG) films exhibit larger Faraday rotation, and have a higher Curie temperature than yttrium iron garnet. We have observed magnetic stripe domains and measured domain widths of 1.4 μm using Fourier domain polarization microscopy, Faraday rotation experiments yield a coercive field of 5 Oe. These characterizations form the basis of micromagnetic simulations that allow us to estimate and compare spin wave excitations in BLIG films. We observed that these films support thermal magnons with a precessional frequency of 7 GHz with a line width of 400 MHz. Further, we studied the dependence of precessional frequency on the externally applied magnetic field. Brillouin light scattering experiments and precession frequencies predicted by simulations show similar trend with increasing field

Magnetic force microscopy of YLaFeO films implanted by high dose of nitrogen ions

The scattering field gradient maps of surface layer magnetic domains in Y₂.₉₅La₀.₀₅Fe₅O₁₂ iron-yttrium garnet modified by high-dose ion implantation with nitrogen ions N+ were obtained by the method of magnetic force microscopy. It was found that improving the magnetic properties of thin films, which includes reducing the observed magnetic losses after high-dose implantation, is accompanied by essential ordering of magnetic domains on the surface of the implanted films. There is a direct dependence of the magnetic properties on the dose of implanted atoms, accompanied by a significant dispersion and amorphization of surface layer and formation of a clear magnetic structure

X-ray excited luminescence of ytterbium containing YAG single crystalline films

Luminescence properties of ytterbium ions in of У₃AI₅О₁₂ (УAG) epitaxial films have been investigated. The influence of growth conditions on the change of activator ions charge state and the luminescence in visible spectral region has been demonstrated. It has been established that emission bands with maxima at 480 and 580 nm are attributed to the 5d-4f transitions of Уb²⁺ ions. The emission bands with maxima at 330 nm and 500 nm correspond to transitions from charge transfer state to ²F₇/₂ and and ²F₅/₂ state of Уb³⁺ ions, respectively.Проведено исследование люминесцентных свойств ионов иттербия в эпитаксиальных пленках У₃AI₅О₁₂ (УAG). Показано влияние условий выращивания на изменение зарядового состояния ионов активатора и его свечения в видимой области спектра. Установлено, что люминесценция в полосах с максимумами при 480 нм и 580 нм в эпитаксиальных пленках УAG:Уb приписывается 5d-4f переходам ионов Уb²⁺. Полосы свечения с максимумами при 330 и 500 нм отвечают переходам из состояния переноса заряда соответственно на уровни ²F₇/₂ и ²F₅/₂ ионов Уb³⁺.Проведено дослiдження люмiнесцентних властивостей iонiв iтербiю в епiтаксiйних плiвках У₃AI₅О₁₂ (УAG). Показано вплив умов вирощування на змiну зарядового стану iонiв активатора та його свiчення у видимiй областi спектра. Встановлено, що люмiнеcценцiя в смугах з максимумами при 480 нм i 580 нм приписується 5d-4f переходам iонiв Уb²⁺. Смуги свiчення з максимумами при 330 i 500 нм вiдповiдають переходам зi стану перенесення заряду вiдповiдно на рiвнi ²F₇/₂ i ²F₅/₂ iонiв Уb³⁺

Magnetization spin dynamics in a (LuBi)3Fe5O12 (BLIG) epitaxial film

Bismuth substituted lutetium iron garnet (BLIG) films exhibit larger Faraday rotation, and have a higher Curie temperature than yttrium iron garnet. We have observed magnetic stripe domains and measured domain widths of 1.4 {\mu}{\mu}m using Fourier domain polarization microscopy, Faraday rotation experiments yield a coercive field of 5 Oe. These characterizations form the basis of micromagnetic simulations that allow us to estimate and compare spin wave excitations in BLIG films. We observed that these films support thermal magnons with a precessional frequency of 7 GHz with a line width of 400 MHz. Further, we studied the dependence of precessional frequency on the externally applied magnetic field. Brillouin light scattering experiments and precession frequencies predicted by simulations show similar trend with increasing field.Comment: Journal of Magnetism and Magnetic Materials, 201