Magnetic anisotropy and ferromagnetic resonance in inhomogeneous demagnetizing fields near edges of thin magnetic films.

Using local ferromagnetic resonance spectroscopy, we have studied the magnetic properties near edges of thin tangentially magnetized permalloy films, in which a well-defined uniaxial magnetic anisotropy was induced perpendicular to one of the edges. In the experiment, two samples with thicknesses of 90 and 300 nm and with slightly different compositions were examined. To explain the magnetization dynamics near edges, we propose a simple yet effective model of a film in the form of a rectangular prism, which yields the modified Kittel formula for the resonance frequency.

Asymmetric Interfaces in Epitaxial Off-Stoichiometric FeSi/Ge/FeSi Hybrid Structures: Effect on Magnetic and Electric Transport Properties.

Three-layer iron-rich FeSi/Ge/FeSi (0.2 < < 0.64) heterostructures on a Si(111) surface with Ge thicknesses of 4 nm and 7 nm were grown by molecular beam epitaxy.

Numerical study of structural and magnetic properties of thin films obliquely deposited on rippled substrates.

Structural modulation in thin films plays a substantial role in the formation of their magnetic properties. By producing topographic patterns in thin films, it is possible to engineer their magnetic response. Here, we report on the numerical study of the relationship between structural and static magnetic properties of thin films obliquely deposited on substrates with the sinusoidal surface.

Microstrip resonator for nonlinearity investigation of thin magnetic films and magnetic frequency doubler.

A structure that consists of a λ/4 stepped-impedance microstrip resonator is proposed as an instrument for the investigation of nonlinear effects in thin magnetic films and also can be used as a microwave frequency doubler. A conversion efficiency of 0.65% is observed at a one-layer 100 nm NiFe thin film at an input signal level of 4.

Design of bandpass filters composed of dielectric layers separated by gratings of strip conductors.

We derive the design formulas for novel multilayer bandpass filters in which every dielectric layer (resonator) is separated from the adjacent layer or external medium by a grating of strip conductors. Every grating acts as a semi-reflecting mirror. Such novel filters have wide stop bands compared to conventional filters with multilayer dielectric mirrors between resonators at the same passband width.

Multilayer bandpass filter with extended lower and upper stop bands.

We propose a novel design for a multilayer bandpass filter in which every resonant dielectric layer is separated from adjacent dielectric layers or from the ambient by a nonresonant grating of strip conductors on the layer interface. Here, every grating acts as a mirror with specified transparency. Relative to the conventional multilayer bandpass filter with multilayer dielectric mirrors, the proposed filter has multiply extended stop bands below and above the passband.

Design of optical bandpass filters based on a two-material multilayer structure.

An easy method for designing filters with equalized passband ripples of a given magnitude is proposed. The filter, which is made of two dielectric materials, comprises coupled half-wavelength resonators and multilayer mirrors. The filter design begins with the synthesis of the multimaterial filter prototype whose mirrors consist of quarter-wavelength layers.

Short-term naloxone administration in schizophrenic and manic patients. A World Health Organization Collaborative Study.

A double-blind study of the behavioral effects of short-term naloxone hydrochloride administration was performed in 32 schizophrenic and 26 manic patients in a World Health Organization collaborative project. There was a significant naloxone-associated reduction in overall physician-rated symptoms in schizophrenic patients concurrently treated with neuroleptic medication (N = 19) but not in medication-free schizophrenics (N = 13). Physician rating of auditory hallucinations showed significant naloxone-associated improvement for the total schizophrenic population, while self-ratings of auditory hallucinations showed improvement only in neuroleptic-treated schizophrenics.