Magnetic Field and Stress-Induced Splitting of the Novel Sharp Emission Line Series in Silicon Associated with P, Li, or B: No Bound Multiple-Exciton Complexes

1976 ◽  
Vol 36 (1) ◽  
pp. 48-51 ◽  
Author(s):  
R. Sauer ◽  
J. Weber
Keyword(s):  
Magnetic Field ◽  
Emission Line ◽  
The Novel ◽  
Sharp Emission Line

Impact of partially thermal electrons on the propagation characteristics of extraordinary mode in relativistic regime

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Syeda Noureen
Keyword(s):  
Magnetic Field ◽  
Maxwell Equations ◽  
Relativistic Quantum ◽  
The Novel ◽  
Propagation Characteristics ◽  
Relativistic Limit ◽  
Long Wavelength ◽  
Relativistic Regime ◽  
Dirac Distribution ◽  
Relativistic Fermi

Abstract On employing linearized Vlasov–Maxwell equations the solution of relativistic electromagnetic extraordinary mode is investigated for the wave propagating perpendicular to a uniform ambient magnetic field (in the presence of arbitrary magnetic field limit i.e., ω > Ω > k.v) in partially degenerate (i.e., for T F ≥ T and T ≠ 0) electron plasma under long wavelength limit (ω ≫ k.v). Due to the inclusion of weak quantum degeneracy the relativistic Fermi–Dirac distribution function is expanded under the relativistic limit ( m 0 2 c 2 2 p 2 < 1 $\frac{{m}_{0}^{2}{c}^{2}}{2{p}^{2}}{< }1$ ) to perform momentum integrations which generate the Polylog functions. The propagation characteristics and shifting of cutoff points of the extraordinary mode are examined in different relativistic density and magnetic field ranges. The novel graphical results of extraordinary mode in relativistic quantum partially degenerate (for μ T = 0 $\frac{\mu }{T}=0$ ), nondegenerate (for μ T ≈ − 1 $\frac{\mu }{T}\approx -1$ ) and fully/completely degenerate (for μ T ≈ $\frac{\mu }{T}\approx $ 1) environments are obtained and the previously reported results are retraced as well.

Novel synthesis of 1,5-disubstituted-1,2,3-triazolines catalysed by Zepto magnetic microspheres under the influence of a rotating magnetic field

2019 ◽  
Vol 97 (3) ◽  
pp. 163-168 ◽  
Author(s):  
Priyanka Sharma ◽  
Srinivasu V. Vallabhapurapu ◽  
Wei H. Ho ◽  
Nanjundaswamy M. Hemmaragala
Keyword(s):  
Magnetic Field ◽  
Magnetic Force ◽  
Rotating Magnetic Field ◽  
Magnetic Microspheres ◽  
The Novel ◽  
Aryl Azides ◽  
Alkyl Aryl ◽  
Novel Synthesis ◽  
Bead Diameter ◽  
Magnetic Poles

The novel reactor has been designed to perform chemical reactions under the influence of a magnetic field generated by alternating magnetic poles as a function of time. The system was successfully employed to synthesize a series of 1,5-disubstituted-1,2,3-triazolines via the regioselective [3 + 2] cycloaddition reactions between alkyl/aryl azides and nitroolefins catalysed by Zepto (para magnetic ultra-blue carboxy functionalized) microspheres (bead diameter 2.5 μm). All of the reactions went smoothly without any adverse effect on nitro, cyano, thienyl, hydroxy, halogens, and ether functions at 25 ± 2 °C and afforded 82%–99% pure products at a magnetic field of 18.99 mT and an exposure time of 180–240 min. The influence of the magnetic force exerted on the magnetic materials was found to enhance the catalytic activity of microspheres. The catalyst could easily be separated by simple centrifugation, which could be reused for at least 15 runs with no loss in activity.

scholarly journals Global characteristics of auroral Hall currents derived from the Swarm constellation: dependences on season and IMF orientation

2017 ◽  
Vol 35 (6) ◽  
pp. 1249-1268 ◽  
Author(s):  
Tao Huang ◽  
Hermann Lühr ◽  
Hui Wang
Keyword(s):  
Magnetic Field ◽  
Hall Current ◽  
Flow Direction ◽  
Magnetic Activity ◽  
The Novel ◽  
Polar Cap ◽  
Magnetic Field Data ◽  
Electrojet Current ◽  
Wind Input ◽  
The Imf

Abstract. On the basis of field-aligned currents (FACs) and Hall currents derived from high-resolution magnetic field data of the Swarm constellation, the average characteristics of these two current systems in the auroral regions are comprehensively investigated by statistical methods. This is the first study considering both current types determined simultaneously by the same spacecraft in both hemispheres. The FAC distribution, derived from the novel Swarm dual-spacecraft approach, reveals the well-known features of Region 1 (R1) and Region 2 (R2) FACs. At high latitudes, Region 0 (R0) FACs appear on the dayside. Their flow direction, up or down, depends on the orientation of the interplanetary magnetic field (IMF) By component. Of particular interest is the distribution of auroral Hall currents. The prominent auroral electrojets are found to be closely controlled by the solar wind input, but we find no dependence of their intensity on the IMF By orientation. The eastward electrojet is about 1.5 times stronger in local summer than in winter. Conversely, the westward electrojet shows less dependence on season. As to higher latitudes, part of the electrojet current is closed over the polar cap. Here the seasonal variation of conductivity mainly controls the current density. During local summer of the Northern Hemisphere, there is a clear channeling of return currents over the polar cap. For positive (negative) IMF By a dominant eastward (westward) Hall current circuit is formed from the afternoon (morning) electrojet towards the dawn side (dusk side) polar cap return current. The direction of polar cap Hall currents in the noon sector depends directly on the orientation of the IMF By. This is true for both signs of the IMF Bz component. Comparable Hall current distributions can be observed in the Southern Hemisphere but for opposite IMF By signs. Around the midnight sector the westward substorm electrojet is dominating. As expected, it is highly dependent on magnetic activity, but it shows only little response to season and IMF By polarity. An important finding is that all the IMF By dependences of FACs and Hall currents practically disappear in the dark winter hemisphere.

scholarly journals DISSIPATIVE 2D ELECTRON ON A TORUS IN EXTERNAL MAGNETIC FIELD: TRANSPORT PROPERTIES AND MAGNETIC TRANSLATIONS

1995 ◽  
Vol 09 (24) ◽  
pp. 3229-3240 ◽  
Author(s):  
G. CRISTOFANO ◽  
D. GIULIANO ◽  
G. MAIELLA ◽  
L. VALENTE
Keyword(s):  
Magnetic Field ◽  
Wave Function ◽  
Transport Properties ◽  
Ground State ◽  
Large Time ◽  
Transverse Magnetic ◽  
The Novel ◽  
Translation Operators ◽  
Magnetic Translation ◽  
Electron Ground State

The effect of dissipation on the electron ground state wave function on a torus in the presence of an external transverse magnetic field is analyzed on large time scales [Formula: see text]. Its extension to the multiparticle center of the mass wave function is also given. The novel transport properties of the system are then studied by applying Laughlin gauge argument with the use of the magnetic translation operators.

scholarly journals Low-Offset In-Plane Sensitive Hall Arrangement

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 713
Author(s):  
Siya Lozanova ◽  
Ivan Kolev ◽  
Avgust Ivanov ◽  
Chavdar Roumenin
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Output Voltage ◽  
Cross Coupling ◽  
The Novel ◽  
Temperature Drift ◽  
Low Offset ◽  
First Time ◽  
Single Configuration ◽  
Hall Elements

A novel in-plane sensitive Hall arrangement consisting of two identical n-Si three-contact (3C) elements and realized in a common technological process, is presented. In the solution, the minimization of the offset and its temperature drift is achieved by cross-coupling of the outer device contacts. This terminals’ connection provides equalizing currents between the two substrates which strongly compensate the inevitable difference in the electrical conditions in the two parts of the arrangement. As a result, the residual offset of both integrated Hall elements at the output Vout(0) and its temperature drift are strongly minimized. The residual offset is about 160 times smaller than the single-configuration one. The obtained output voltage-to-residual offset ratio at sensitivity of SRI ≈ 98 V/AT is very promising, reaching 6 × 103 at temperature T = 40 °C and induction 1 T. As a result, increased metrological accuracy for numerous applications is achieved. For a first time through the novel arrangement a suppression of sensitivity in the presence of external magnetic field could be achieved in order to obtain permanent offset information. This is one of the key results in the Hall device investigation.

Co-precipitation synthesis and photoluminescence properties of BaTiF6:Mn4+: an efficient red phosphor for warm white LEDs

2018 ◽  
Vol 6 (1) ◽  
pp. 127-133 ◽  
Author(s):  
Yong Liu ◽  
Guojun Gao ◽  
Lin Huang ◽  
Yiwen Zhu ◽  
Xuejie Zhang ◽  
...  
Keyword(s):  
Emission Line ◽  
Photoluminescence Properties ◽  
Broad Absorption ◽  
Red Phosphor ◽  
White Leds ◽  
Blue Region ◽  
Precipitation Synthesis ◽  
Co Precipitation ◽  
Sharp Emission Line

BaTiF6:Mn4+: a fluoride-based red phosphor with a sharp emission line and broad absorption in the blue region used for warm WLEDs.

Modeling and Experimental Verification of the Contact Resistance of a Novel Anisotropic Conductive Adhesive

2007 ◽  
Author(s):  
S. Manian Ramkumar ◽  
Krishnaswami Srihari
Keyword(s):  
Magnetic Field ◽  
Contact Resistance ◽  
Initial Contact ◽  
The Novel ◽  
Interfacial Resistance ◽  
Conductive Adhesives ◽  
Anisotropic Conductive Adhesive ◽  
Resistor Networks ◽  
Joint Contact ◽  
Conductive Particles

The need to eliminate lead-based materials as a means of interconnection has renewed the electronics industry’s interest in using conductive adhesives for component attach, especially Anisotropic Conductive Adhesives (ACA). Typical ACAs require the application of pressure during the curing process, to establish the electrical connection and also to capture a monolayer of conductive particles between the mating surfaces. The novel ACA discussed in this paper uses a magnetic field to align the particles in the Z-axis direction during curing and eliminates the need for pressure. The application of the magnetic field allows for the formation of conductive chains between the mating surfaces, thereby eliminating lateral conductivity. This uniqueness of the novel ACA also accommodates for any coplanarity error and the formation of effective Z-axis conductivity, with a variety of lead and bump shapes. The novel ACA also enables mass curing of the adhesive, eliminating the need for sequential assembly. As part of the study presented in this paper, the conductive chains were modeled as series and parallel resistor networks in an insulating adhesive matrix. The number of particles in the chain and hence the number of interfaces between the particles is found to influence the initial contact resistance of the joints. The interfacial resistance is derived from the experimental run. Area array packages with and without bumps, reveal varying contact resistances as indicated by the model and experiment. This paper will present a model for the conductive chain formation in the novel ACA, and discuss the experimental results obtained to verify the joint contact resistance.

1.4 eV - LUMINESCENCE BAND IN 6H-SIC: SYMMETRY OF THE ASSOCIATED DEFECT

2009 ◽  
Vol 23 (12n13) ◽  
pp. 3019-3023 ◽  
Author(s):  
A. WYSMOŁEK ◽  
R. STĘPNIEWSKI ◽  
K. WARDAK ◽  
J. BARANOWSKI ◽  
M. POTEMSKI ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Emission Line ◽  
Luminescence Band ◽  
Uniaxial Stress ◽  
Final States ◽  
High Quality ◽  
Characteristic Emission

Magneto- and piezo-spectroscopy of high quality bulk samples have been used to clarify the origin of the characteristic, V1, V2 and V3 luminescence lines observed in 6 H - SiC polytypes, correspondingly, at 1.433, 1.398, and 1.368 eV. The uniaxial stress, up to 500 MPa, was applied along [11-20] and [10-10] directions, perpendicular to the c -axis of the investigated 6 H - SiC crystals. Magnetic field was applied in different directions with respect to the c -axis. The obtained results allow us to analyze in detail the symmetry of the initial and final states responsible for the V2 emission line. This analysis leads to a conclusion which contradicts the existing identification of the defect responsible for this characteristic emission.

Sign in / Sign up

Export Citation Format

Share Document