Latest

1566 posts

Electron dynamics in inhomogeneous magnetic fields.

RF Safe Research Library Jan 1, 2010 NEUTRAL UNKNOWN

This paper is a review of two-dimensional electron dynamics in microscopically inhomogeneous magnetic fields, focusing on magnetic potentials varying on scales smaller than the mean free path. It covers early work on localization in random magnetic fields, methods to fabricate magnetic potentials,…

Quantitative determination of domain distribution in SrTiO3-competing effects of applied electric field and mechanical stress.

RF Safe Research Library Jan 1, 2010 NEUTRAL MEDIUM

This neutron diffraction study quantifies how tetragonal structural domains in SrTiO3 redistribute below 105 K under external electric fields and uniaxial mechanical stress. The authors report that electric field and stress act competitively, and that applying both produces complex domain…

Pressure and magnetic field dependence of valence and magnetic transitions in EuPtP.

RF Safe Research Library Jan 1, 2010 NEUTRAL MEDIUM

This laboratory study investigates how magnetic field and pressure affect valence and magnetic transitions in the compound EuPtP. High-field analysis suggests a mixed valence state at low temperature and discontinuous changes in Eu2+ fraction at two transition temperatures. Pressure increases the…

Thermodynamic behavior of the XXZ Heisenberg s = 1/2 chain around the factorizing magnetic field.

RF Safe Research Library Jan 1, 2010 NEUTRAL UNKNOWN

This paper theoretically investigates zero- and finite-temperature behavior of an anisotropic antiferromagnetic Heisenberg XXZ spin-1/2 chain under a transverse magnetic field, focusing between the factorizing and critical fields. It reports an entanglement phase transition at the factorizing…

Electric field gradients in (111)In-doped (Hf/Zr)3Al2 and (Hf/Zr)4Al3 mixed compounds: ab initio calculations, perturbed angular correlation measurements and site preference.

RF Safe Research Library Jan 1, 2010 NEUTRAL MEDIUM

This materials-physics study investigated quadrupolar hyperfine interactions of (111)In→(111)Cd probes in polycrystalline Zr4Al3 and Hf4Al3 containing minority (Zr/Hf)3Al2 phases. The authors observed a strong preference of (111)In solutes for the minority (Zr/Hf)3Al2 phases. Ab initio EFG…

Effect of two length scales on the properties of MgB(2) for arbitrary applied magnetic field.

RF Safe Research Library Jan 1, 2010 NEUTRAL MEDIUM

This paper analyzes anomalous magnetic-field and temperature dependences observed in MgB(2) superconductivity experiments using a two-order-parameter Ginzburg-Landau theory with two length scales. The authors numerically solve the nonlinear Ginzburg-Landau equations for arbitrary applied fields…

Two-dimensional electron states bound to an off-plane donor in a magnetic field.

RF Safe Research Library Jan 1, 2010 NEUTRAL UNKNOWN

A theoretical analysis is presented of electron states in a two-dimensional plane bound to an off-plane donor impurity under a magnetic field. The authors calculate energy levels (ground and first three excited states) variationally and report binding energies and mean orbital radii as functions…

Electric fields on quasiperiodic potentials.

RF Safe Research Library Jan 1, 2010 NEUTRAL UNKNOWN

This theoretical condensed-matter study examines how an electric field affects the electronic spectrum and localization in quasiperiodic chains modeled with Harper and Fibonacci potentials. It reports localized ladder spectra under strong fields and smoothing with linearly decreasing gaps under…

The modulation of the de Haas-van Alphen effect in graphene by electric field.

RF Safe Research Library Jan 1, 2010 NEUTRAL UNKNOWN

This theoretical/physics paper examines how an in-plane uniform electric field affects the de Haas-van Alphen (dHvA) effect in graphene. It reports that magnetization, magnetic susceptibility, and dHvA oscillation behavior depend on a dimensionless parameter β = E/(vF B), with divergences…

Spin polarization induced by in-plane electric and magnetic fields in two-dimensional heavy-hole systems.

RF Safe Research Library Jan 1, 2010 NEUTRAL UNKNOWN

This theoretical study uses a nonequilibrium Green function approach to analyze current-induced spin polarization in a two-dimensional heavy-hole system with cubic Rashba spin-orbit coupling under in-plane electric and magnetic fields. The authors report monotonic decreases in longitudinal…

Surface superconducting states in a yttrium hexaboride single crystal in a tilted magnetic field.

RF Safe Research Library Jan 1, 2010 NEUTRAL UNKNOWN

This experimental study examined nucleation of superconductivity at the surface of a single-crystal yttrium hexaboride (YB6) in a tilted dc magnetic field. The authors measured Hc3 on each side of the sample as a function of the angle between the field and the surface. They report Hc3/Hc2 ≈ 1.28…

An extension of the Czjzek model for the distributions of electric field gradients in disordered solids and an application to NMR spectra of 71Ga in chalcogenide glasses.

RF Safe Research Library Jan 1, 2010 NEUTRAL UNKNOWN

This paper discusses the Czjzek model for distributions of electric field gradient (EFG) tensors in disordered solids and highlights its underlying assumptions and characteristics. It then introduces an extended model that combines a defined local EFG environment with an adjustable Gaussian…

Slow relaxation of magnetoresistance in AlGaAs-GaAs quantum well structures quenched in a magnetic field.

RF Safe Research Library Jan 1, 2010 NEUTRAL UNKNOWN

This study reports slow relaxation of magnetoresistance in selectively doped p-GaAs-AlGaAs structures following application of a magnetic field. The authors emphasize efforts to rule out temperature fluctuation artifacts and state that the main relaxation features remain. They interpret the…

Electric field induced structuring in clay-oil suspensions: new insights from WAXS, SEM, leak current, dielectric permittivity, and rheometry.

RF Safe Research Library Jan 1, 2010 NEUTRAL MEDIUM

This laboratory/engineering study examined electric-field-induced structuring in clay-oil suspensions using WAXS, SEM, rheometry, and electrical measurements. Particle orientation was quantified via an orientational order parameter derived from diffraction peak azimuthal changes, and chain versus…

Ultrasonic propagation velocity in magnetic and magnetorheological fluids due to an external magnetic field.

RF Safe Research Library Jan 1, 2010 NEUTRAL MEDIUM

This engineering-focused study measured ultrasonic propagation velocity in hydrocarbon-based magnetic and magnetorheological fluids under an external magnetic field. The authors report that clustering structures formed in the fluids influence ultrasonic propagation velocity, with observed…

The influence of temperature and electric field history on the conductivity of the charge density wave system o-TaS3.

RF Safe Research Library Jan 1, 2010 NEUTRAL UNKNOWN

This laboratory study examined how temperature and prior electric-field exposure affect low-field conductivity in the charge density wave material o-TaS3. Conductivity differed between cooling and heating below the CDW transition, and applying increasing electric fields drove the system toward a…

Disordered electrical potential observed on the surface of SiO2 by electric field microscopy.

RF Safe Research Library Jan 1, 2010 NEUTRAL MEDIUM

This study characterizes the electrical potential on the surface of ~300 nm SiO2 grown on single-crystalline Si under ambient conditions using electric field microscopy. It reports an inhomogeneous surface potential with fluctuations up to ~0.4 V over ~1 µm regions. The authors propose these…

Radiofrequency microtenotomy for the treatment of plantar fasciitis shows good early results.

RF Safe Research Library Jan 1, 2010 NEUTRAL LOW

This small clinical case series evaluated TOPAZ radiofrequency coblation microtenotomy for recalcitrant plantar fasciitis in 14 patients. The abstract reports improved AOFAS hindfoot scores at 3 and 6 months and improvements in several SF-36 domains, with most patients reporting good-to-excellent…

Pedestrians, vehicles, and cell phones.

RF Safe Research Library Jan 1, 2010 CONCERN MEDIUM

This study used an immersive virtual environment to examine how divided attention affects pedestrian street-crossing performance. Thirty-six participants crossed virtual streets while undistracted, conversing hands-free on a cell phone, or listening to music. Cell phone conversation was associated…

In vitro tests reveal sample radiofrequency identification readers inducing clinically significant electromagnetic interference to implantable pacemakers and implantable cardioverter-defibrillators.

RF Safe Research Library Jan 1, 2010 NEUTRAL MEDIUM

This in vitro study tested electromagnetic compatibility between passive RFID readers and 15 pacemakers plus 15 ICDs across 134 kHz, 13.56 MHz, and 915 MHz bands. EMI reactions were common with low-frequency RFID and rare with high-frequency RFID, while no reactions were observed with…

Page 71 / 79
Prev Next