SPECIFIC HEAT OF SPIN-1 AND SPIN-3/2 MIXED 3D ISING FERROMAGNETIC MODEL IN EXTERNAL MAGNETIC FIELD

2012 ◽  
Vol 26 (16) ◽  
pp. 1250101 ◽  
Author(s):  
XIYU SU ◽  
LINGLING ZHENG ◽  
QINYING HOU
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Specific Heat ◽  
Magnetic Order ◽  
Field Range ◽  
Magnetic Field Range ◽  
Disorder Phase Transition ◽  
Ferromagnetic System ◽  
The Magnetic Field ◽  
Transition Temperature Increase

The specific heat of spin-1 and spin-3/2 mixed 3D Ising ferromagnetic system in the external magnetic field is studied by Monte Carlo method. The obtained results show that the existence of the external magnetic field makes the order-disorder phase transition temperature increase; with the crystal field increasing, the critical external magnetic field for a new magnetic order phase occurring increases, and the magnetic field range for maintaining each order phase becomes larger.

scholarly journals Магнитосопротивление и квантовые осцилляции в полуметалле WTe-=SUB=-2-=/SUB=-

2021 ◽  
Vol 63 (12) ◽  
pp. 2033
Author(s):  
А.Л. Пирозерский ◽  
Е.В. Чарная ◽  
M.K. Lee ◽  
L.-J. Chang ◽  
С.В. Наумов ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Single Crystal ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Field Range ◽  
Magnetic Field Range ◽  
Fundamental Frequencies ◽  
Shubnikov De Haas Oscillations ◽  
The Magnetic Field ◽  
Strong Spin

The discovery of extreme magnetoresistance (XMR) in non-magnetic materials attracted attention to the WTe2 semimetal. We have carried out studies of magnetoresistance in a tungsten ditelluride single crystal in the magnetic field range up to 14 T. Magnetoresistance increased with increasing field following a near quadratic law without saturation. The Shubnikov-de Haas oscillations were observed. Four fundamental frequencies were found in the oscillations spectrum, which correspond to two electron and two hole pockets caused by strong spin-orbit coupling.

scholarly journals Observation of Fractal Conductance Fluctuations over Three Orders of Magnitude

1999 ◽  
Vol 52 (5) ◽  
pp. 887 ◽  
Author(s):  
R. P. Taylor ◽  
A. P. Micolich ◽  
R. Newbury ◽  
T. M. Fromhold ◽  
C. R. Tench
Keyword(s):  
Magnetic Field ◽  
Transport Properties ◽  
Field Range ◽  
Magnetic Field Range ◽  
Physical Conditions ◽  
Fractal Behaviour ◽  
Conductance Fluctuations ◽  
Order Of Magnitude ◽  
The Magnetic Field

Fractal magneto-transport properties of mesoscopic semiconductor billiards are highly topical. In these studies, the magnetic field range over which fractal behaviour can be observed is crucial. Previous observations have been limited to approximately one order of magnitude. We present fractal conductance fluctuations observed over three orders of magnitude and discuss the physical conditions required to extend this range.

The Effect of Magnetic Field on the Hydration of Nanoscopic Hydrophobic N-Alkane Plates

2011 ◽  
Vol 228-229 ◽  
pp. 1007-1011
Author(s):  
Wei Wei Zhang ◽  
Long Qiu Li ◽  
Guang Yu Zhang ◽  
Hui Juan Dong
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Dynamics Simulation ◽  
Free Energy Barrier ◽  
Confined Water ◽  
Magnetic Exposure ◽  
Hydrophobic Solutes ◽  
The Magnetic Field ◽  
Density Of Water ◽  
Induced Adsorption

The effect of an external magnetic field on the hydration behavior of nanoscopic n-octane plates has been extensively investigated using molecular dynamics simulation in an isothermal-isobaric ensemble. The solute plates with different intermolecular spacing have also been considered to examine the effect of the topology of hydrophobic plates on the adsorption behavior of confined water in the presence of an external magnetic field with an intensity ranging from 0.1T to 1 T. The results demonstrate that magnetic exposure decreases the density of water for the plates with intermolecular spacing of a0 = 4 and 5 Å. This suggests that the free energy barrier for evaporation can be lowered by the applied field, and the hydrophobic solutes consisting of condensed n-octane molecules are apt to aggregate in the aqueous solution. In contrast, the magnetic field improves the dissolution or wetting of solutes comprised of loosely packed n-octane plates of a0=7Å. A magnetic-field-induced adsorption-to-desorption translation, which is in agreement with the experimental results provided by Ozeki, has also been observed for the plates with intermolecular spacing of a0 = 6 Å.

MAGNETIC FIELD DEPENDENCE OF CRITICAL CURRENTS IN SUPERCONDUCTING POLYCRYSTALS

1992 ◽  
Vol 06 (03) ◽  
pp. 161-169 ◽  
Author(s):  
K.I. KUGEL ◽  
T. YU. LISOVSKAYA ◽  
R.G. MINTS
Keyword(s):  
Magnetic Field ◽  
Magnetic Field Dependence ◽  
Asymptotic Form ◽  
Critical Currents ◽  
Transport Current ◽  
Wide Field ◽  
London Penetration Depth ◽  
Field Range ◽  
Crystallographic Axes ◽  
The Magnetic Field

We study the dependence of critical current j c on magnetic field H in superconducting polycrystals which are considered as systems of superconducting crystallites (isotropic or anisotropic) with Josephson contacts between them. Isotropy or anisotropy of contacts depends on the orientation of their crystallographic axes relatively to edges of contact planes. It is shown that for a system of randomly oriented isotropic contacts, the dependence j c (H) in a relatively wide field range has the asymptotic form j c ~( ln H)/H2. This differs drastically from j c (H) for single contacts. Anisotropy effects due to large differences in London penetration depth λ values corresponding to external magnetic field directed along different axes are analyzed in detail. It is shown that for uniaxal crystals with λ1=λ2≪λ3, this anisotropy leads to the relation [Formula: see text] for chaotic orientation of crystallites. The form of j c (H) curves for two different orientations of the magnetic field relatively to the transport current through the sample is found.

The magnetic field dependence of the low temperature (0.1K to 3K) residual specific heat of Pr2−x Ce x CuO4−δ

1996 ◽  
Vol 46 (S3) ◽  
pp. 1213-1214 ◽  
Author(s):  
T. E. Hargreaves ◽  
J. Akimitsu ◽  
D. F. Brewer ◽  
N. E. Hussey ◽  
H. Noma ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Low Temperature ◽  
Specific Heat ◽  
Field Dependence ◽  
Magnetic Field Dependence ◽  
The Magnetic Field

Open orbits in ReO3

1979 ◽  
Vol 57 (6) ◽  
pp. 860-863 ◽  
Author(s):  
F. S. Razavi ◽  
W. R. Datars
Keyword(s):  
Magnetic Field ◽  
Plane Wave ◽  
Relative Number ◽  
Structure Calculation ◽  
Band Structure Calculation ◽  
Wave Band ◽  
Field Range ◽  
Augmented Plane Wave ◽  
Magnetic Field Range ◽  
The Third

Open orbits in the metal oxide ReO3 were studied by the induced torque method at a temperature of 1.4 K with magnetic fields up to 5.5 T.[Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], and [Formula: see text] open orbits were detected. The results show that the third-band Fermi surface of ReO3 is connected along [Formula: see text] directions as predicted by Mattheiss' augmented-plane-wave band structure calculation. The angular magnetic field range for observation of open orbits and the relative number of primary and secondary open orbits are given.

Viscomagnetic Heat Flux Experiments as a Test of Gas Kinetic Theory in the Burnett Regime

1978 ◽  
Vol 33 (7) ◽  
pp. 749-760 ◽  
Author(s):  
G. E. J. Eggermont ◽  
P. W. Hermans ◽  
L. J. F. Hermans ◽  
H. F. P. Knaap ◽  
J. J. M. Beenakker
Keyword(s):  
Magnetic Field ◽  
Boundary Layer ◽  
Heat Flux ◽  
External Magnetic Field ◽  
Room Temperature ◽  
Flow Direction ◽  
Rectangular Channel ◽  
Gas Kinetic Theory ◽  
The Magnetic Field ◽  
Good Agreement

In a rarefied polyatomic gas streaming through a rectangular channel, an external magnetic field produces a heat flux perpendicular to the flow direction. Experiments on this “viscom agnetic heat flux” have been performed for CO, N2, CH4 and HD at room temperature, with different orientations of the magnetic field. Such measurements enable one to separate the boundary layer contribution from the purely bulk contribution by means of the theory recently developed by Vestner. Very good agreement is found between the experimentally determined bulk contribution and the theoretical Burnett value for CO, N2 and CH4 , yet the behavior of HD is found to be anomalous.

scholarly journals Fiber optic magnetic field sensor using Co doped ZnO nanorods as cladding

RSC Advances ◽  
2018 ◽  
Vol 8 (33) ◽  
pp. 18243-18251 ◽  
Author(s):  
S. Narasimman ◽  
L. Balakrishnan ◽  
Z. C. Alex
Keyword(s):  
Magnetic Field ◽  
Fiber Optic ◽  
Zno Nanorods ◽  
Magnetic Field Sensor ◽  
Maximum Sensitivity ◽  
Field Range ◽  
Magnetic Field Range ◽  
Field Sensor ◽  
Doped Zno ◽  
Co Doped

A fiber optic magnetic field sensor based on Co doped ZnO nanorods is proposed and demonstrated. The sensor has an operating magnetic field range of 17 mT to 180 mT and shows a maximum sensitivity of ∼18% for 15 at% Co doped ZnO nanorods.

Sign in / Sign up

Export Citation Format

Share Document