Anomalous magnetic field dependence of Y Ba(2)Cu(3)O(7 - δ): effect of orthorhombic distortion.
Research
RF Safe Research Library
Jan 1, 2010
This paper presents a theoretical model to investigate the origin of a mixed symmetry pairing state in the high-Tc superconductor YBa2Cu3O7-δ under applied magnetic fields between Hc1 and Hc2. The authors report that the model’s results, and their stated agreement with relevant experimental data, suggest orthorhombic…
Electron dynamics in inhomogeneous magnetic fields.
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RF Safe Research Library
Jan 1, 2010
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, and drift-diffusion…
Quantitative determination of domain distribution in SrTiO3-competing effects of applied electric field and mechanical stress.
Research
RF Safe Research Library
Jan 1, 2010
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 redistribution. The results…
Pressure and magnetic field dependence of valence and magnetic transitions in EuPtP.
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RF Safe Research Library
Jan 1, 2010
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 transition…
Thermodynamic behavior of the XXZ Heisenberg s = 1/2 chain around the factorizing magnetic field.
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RF Safe Research Library
Jan 1, 2010
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 field where entanglement…
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.
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RF Safe Research Library
Jan 1, 2010
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 calculations were used to…
Effect of two length scales on the properties of MgB(2) for arbitrary applied magnetic field.
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RF Safe Research Library
Jan 1, 2010
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 between Hc1 and Hc2 to…
Electric fields on quasiperiodic potentials.
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RF Safe Research Library
Jan 1, 2010
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 weak fields. When…
The modulation of the de Haas-van Alphen effect in graphene by electric field.
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RF Safe Research Library
Jan 1, 2010
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 described at a critical…
Spin polarization induced by in-plane electric and magnetic fields in two-dimensional heavy-hole systems.
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RF Safe Research Library
Jan 1, 2010
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 conductivity with…
Surface superconducting states in a yttrium hexaboride single crystal in a tilted magnetic field.
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RF Safe Research Library
Jan 1, 2010
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 for a perpendicular…
Slow relaxation of magnetoresistance in AlGaAs-GaAs quantum well structures quenched in a magnetic field.
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RF Safe Research Library
Jan 1, 2010
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 phenomenon using a…
The influence of temperature and electric field history on the conductivity of the charge density wave system o-TaS3.
Research
RF Safe Research Library
Jan 1, 2010
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 stable,…
Disordered electrical potential observed on the surface of SiO2 by electric field microscopy.
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RF Safe Research Library
Jan 1, 2010
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 fluctuations could affect…
Pedestrians, vehicles, and cell phones.
Research
RF Safe Research Library
Jan 1, 2010
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 with a lower…
In vitro tests reveal sample radiofrequency identification readers inducing clinically significant electromagnetic interference to implantable pacemakers and implantable cardioverter-defibrillators.
Research
RF Safe Research Library
Jan 1, 2010
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 ultra-high-frequency or…
The effects of microwave emitted by cellular phones on ovarian follicles in rats
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RF Safe Research Library
Jan 1, 2009
This animal study examined whether prenatal exposure to mobile phone microwaves affects ovarian development in rats. Pregnant rats were exposed to a phone placed under the cage throughout pregnancy, with mostly standby exposure and brief periodic speech-mode exposure. Female pups assessed at 21 days had fewer ovarian…
Electromagnetic fields and DNA damage
Research
RF Safe Research Library
Jan 1, 2009
This review discusses the comet assay and summarizes research on non-ionizing EMF exposure and DNA/chromosomal damage. It describes both positive and negative findings across studies, noting no consistent overall pattern for radiofrequency radiation (RFR). The authors nonetheless conclude that under certain exposure…
Scientific Committee on Emerging and Newly Identified Health Risks
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RF Safe Research Library
Jan 1, 2009
This SCENIHR Opinion updates earlier 2009 SCENIHR documents on EMF health effects and research needs, focusing on new information and remaining knowledge gaps. The abstract primarily characterizes sources and patterns of exposure across static, ELF, IF, and RF fields in both public and occupational settings. It notes…
Parenting by cell phone: parental monitoring of adolescents and family relations.
Research
RF Safe Research Library
Jan 1, 2009
This cross-sectional questionnaire study of 196 parent–adolescent dyads examined how cell phone calling patterns relate to perceptions of truthfulness, parental knowledge, and family relationships. More frequent parental calling was associated with lower perceived truthfulness, and calls made when upset were linked…
[Treatment of benign prostatic hyperplasia by radiofrequency (TUNA): a monocentric study of 28 cases treated in ambulatory surgery].
Research
RF Safe Research Library
Jan 1, 2009
This monocentric study evaluated outpatient feasibility and outcomes of radiofrequency transurethral needle ablation (TUNA) for benign prostatic hyperplasia in patients who did not respond to medical therapy. In the outpatient subgroup, urinary symptom scores, quality of life, flow measures, and residual urine…
Localizing Broca's area for transcranial magnetic stimulation: Comparison of surface distance measurements and stereotaxic positioning.
Research
RF Safe Research Library
Jan 1, 2009
This methods study evaluated an MRI-based surface distance measurements (SDM) approach for localizing Broca's area for TMS coil placement without external tracking devices. Coil positioning using SDM was compared with an advanced frameless stereotaxic navigation system. The reported mean difference between methods…
In vitro magnetic stimulation of pig phrenic nerve with transverse and longitudinal induced electric fields: analysis of the stimulation site.
Research
RF Safe Research Library
Jan 1, 2009
This in vitro study analyzed where magnetic stimulation activates pig phrenic nerves when induced electric fields are oriented longitudinally versus transversely to the nerve trunk. Longitudinal-field stimulation localized activation near the negative peak of the spatial derivative of the longitudinal electric field,…
The use of pulsed radiofrequency treatment for chronic benign pancreatitis pain.
Research
RF Safe Research Library
Jan 1, 2009
This paper reports on pulsed radiofrequency treatment as an interventional approach for pain due to chronic benign pancreatitis. The authors describe their experience in two patients and characterize the technique as minimally neurodestructive and potentially able to reduce pain perception by altering nerve…
The use of a standard radiofrequency energy delivery system to facilitate transseptal puncture.
Research
RF Safe Research Library
Jan 1, 2009
This paper describes a procedural technique for transseptal puncture that uses brief pulses of radiofrequency energy delivered from a standard electrosurgical cautery generator through the needle tip. The approach is presented as a way to facilitate septal traversal when tissue is elastic, aneurysmal, or thickened,…