scholarly journals Magnetically Controlled Photovoltaic Diode Structure

2002 ◽  
Vol 721 ◽  
Author(s):  
V. K. Dugaev ◽  
Yu. Vygranenko ◽  
M. Vieira ◽  
V. I. Litvinov ◽  
J. Barnaś
Keyword(s):  
Magnetic Field ◽  
Applied Magnetic Field ◽  
Diode Structure ◽  
Device Performance ◽  
Half Metallic ◽  
Material Parameters ◽  
Metallic Compound ◽  
Integrated Device ◽  
Relevant Material

AbstractWe propose a new integrated device for spintronics application, which is based on a hybrid metal-semiconductor structure. The device consists of a Si-based p-i-n photodetector sandwiched between two layers of a ferromagnetic metal (3d ferromagnet or half-metallic compound). The photocurrent flowing in such a system is shown to depend on its magnetic configuration. This, in turn, allows controlling the device performance by an externally applied magnetic field. We have estimated magnitude of the effect and also determined the role of relevant material parameters.

STRIPES, PSEUDOGAP AND SC-SDW RESONANCE IN HTSC PEROVSKITES

2000 ◽  
Vol 14 (29n31) ◽  
pp. 3577-3583 ◽  
Author(s):  
L. S. MAZOV
Keyword(s):  
Magnetic Field ◽  
Spin Density ◽  
Applied Magnetic Field ◽  
Density Wave ◽  
Spin Density Wave ◽  
Modulation Amplitude ◽  
Dynamic Nature ◽  
Crystalline Film ◽  
Single Crystalline Film

The significant role of spin stripes in HTSC system is emphasized. The evidence for spin density wave (SDW) nature of pseudogap is presented. The dependence of CuO2 lattice modulation amplitude on the temperature and applied magnetic field is studied. The indication to possible SDW-SC resonance is obtained. The possible amplification of Tc with using of artificial magnetic stripes with taking into account their dynamic nature is proposed. An example of twofold amplification of Tc in thin single-crystalline film of La-based cuprate is presented.

scholarly journals Hybridization and Field Driven Phase Transitions in Hexagonally Warped Topological Insulators

SPIN ◽  
2016 ◽  
Vol 06 (02) ◽  
pp. 1640005 ◽  
Author(s):  
Anirudha Menon ◽  
Debashree Chowdhury ◽  
Banasri Basu
Keyword(s):  
Magnetic Field ◽  
Thin Film ◽  
Phase Transition ◽  
Phase Transitions ◽  
Electric Field ◽  
Surface States ◽  
Material Parameters ◽  
Insulator Phase Transition ◽  
Tilted Magnetic Field

In this paper, we discuss the role of material parameters and external field effects on a thin film topological insulator(TI) in the context of quantum phase transition (QPT). First, we consider an in-plane tilted magnetic field and determine the band structure of the surface states as a function of the tilt angle. We show that the presence of either a hybridization term or hexagonal warping or a combination of both leads to a semi-metal to insulator phase transition which is facilitated by their [Formula: see text] symmetry breaking character. We then note that while the introduction of an electric field does not allow for this QPT since it does not break [Formula: see text] symmetry, it can be used in conjunction with a tunneling element to reach a phase transition efficiently. The corresponding critical point is then nontrivially dependent on the electric field, which is pointed out here. Then, we demonstrate that including a hexagonal warping term leads to an immediate [Formula: see text] symmetry violating QPT.

The role of applied magnetic field in Co-doped ZnS thin films fabricated by pulsed laser deposition

2021 ◽  
Vol 114 ◽  
pp. 110877
Author(s):  
Dongwen Gao ◽  
Li Wang ◽  
Xueqiong Su ◽  
Jin Wang ◽  
Ruixiang Chen
Keyword(s):  
Magnetic Field ◽  
Thin Films ◽  
Pulsed Laser Deposition ◽  
Applied Magnetic Field ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Co Doped

scholarly journals Role of the Applied Magnetic Field on the Microstructural Evolution in Alnico 8 Alloys

2014 ◽  
Vol 1 (1) ◽  
pp. 27-35 ◽  
Author(s):  
Lin Zhou ◽  
M. K. Miller ◽  
H. Dillon ◽  
A. Palasyuk ◽  
S. Constantinides ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Microstructural Evolution ◽  
Applied Magnetic Field

TRANSVERSE WAVES PROPAGATING ALONG AN APPLIED MAGNETIC FIELD IN A PLASMA

1964 ◽  
Vol 42 (5) ◽  
pp. 906-917
Author(s):  
R. E. Burgess ◽  
J. G. Cook
Keyword(s):  
Magnetic Field ◽  
Dispersion Equation ◽  
Applied Magnetic Field ◽  
Equation Of Motion ◽  
Alfven Waves ◽  
Alfven Wave ◽  
Alfvén Waves ◽  
Transverse Waves ◽  
The Magnetic Field

Transverse waves propagating along an applied magnetic field are studied, with special attention to the role of the magnetic field in determining the behavior of the wave. No restrictions are placed on the hole (or ion) mass, and the electron and hole densities may differ. The behavior of the magnetic-field-dominated waves is studied, and it is shown that it is profitable to extend the concept of an Alfvén wave to include those waves for which essentially B0 instead of B02 appears in the dispersion equation. Both intrinsic and extrinsic cases are studied.The dispersion equation approach is compared with the equation of motion and Ohm's law approach used by Watanabe for a study of Alfvén waves, and Watanabe's starting equations are generalized to make a study of Alfvén waves in solid-state plasmas with Watanabe's approach possible.

scholarly journals Linear Analysis of Converging Richtmyer–Meshkov Instability in the Presence of an Azimuthal Magnetic Field

2017 ◽  
Vol 140 (5) ◽  
Author(s):  
Abeer Bakhsh ◽  
Ravi Samtaney
Keyword(s):  
Magnetic Field ◽  
Growth Rate ◽  
Applied Magnetic Field ◽  
Linear Analysis ◽  
Mean Value ◽  
Azimuthal Magnetic Field ◽  
Suppression Mechanism ◽  
Rayleigh Taylor Instability ◽  
Initial Seed

We investigate the linear stability of both positive and negative Atwood ratio interfaces accelerated either by a fast magnetosonic or hydrodynamic shock in cylindrical geometry. For the magnetohydrodynamic (MHD) case, we examine the role of an initial seed azimuthal magnetic field on the growth rate of the perturbation. In the absence of a magnetic field, the Richtmyer–Meshkov growth is followed by an exponentially increasing growth associated with the Rayleigh–Taylor instability (RTI). In the MHD case, the growth rate of the instability reduces in proportion to the strength of the applied magnetic field. The suppression mechanism is associated with the interference of two waves running parallel and antiparallel to the interface that transport vorticity and cause the growth rate to oscillate in time with nearly a zero mean value.

Room-temperature magnetoelectric coupling, dielectric and impedance studies of 0.5Zn0.3Ni0.7Fe2O4–0.5HoMnO3 nanocomposite

2018 ◽  
Vol 32 (19) ◽  
pp. 1840060 ◽  
Author(s):  
Rajesh Debnath ◽  
S. K. Mandal ◽  
A. Nath ◽  
P. Dey
Keyword(s):  
Magnetic Field ◽  
Dielectric Constant ◽  
Grain Boundaries ◽  
Applied Magnetic Field ◽  
Room Temperature ◽  
Transverse Direction ◽  
Dominant Role ◽  
Dc Magnetic Field ◽  
Nyquist Plots

We have investigated strain mediated magnetoelectric (ME) coupling and impedance properties in 0.5Zn[Formula: see text]Ni[Formula: see text]Fe2O4–0.5HoMnO3 nanocomposites at room-temperature. The ME voltage is measured in both longitudinal and transverse direction at a frequency of 173 Hz. The impedance, real and imaginary parts of impedance and dielectric constant have been carried out in presence of DC magnetic field. With the application of magnetic field, slight decrease in dielectric constant has been observed. The impedance, real and imaginary parts of impedance are found to increase with the increase in the applied magnetic field. Nyquist plots have been fitted using three parallel combinations of resistances–capacitance circuits. Fitted parameters show the dominant role of grain boundaries, grains and interface of two types of grains of the sample.

Sign in / Sign up

Export Citation Format

Share Document