Phenomenological Model of the Temperature Dependence of Hysteresis Based on the Preisach Model

2021 ◽  
Author(s):  
Mourad Dafri ◽  
Abdelaziz Ladjimi ◽  
Sofiane Mendaci ◽  
Abdesselam Babouri
Keyword(s):  
Temperature Dependence ◽  
Phenomenological Model ◽  
Preisach Model

Ion Mixing of Near-Noble Transition Metal Films on Evaporated and Large-Grained Aluminum Substrates

1987 ◽  
Vol 93 ◽  
Author(s):  
E. Ma ◽  
X.-A. Zhao ◽  
M-A. Nicolet
Keyword(s):  
Low Temperature ◽  
Transition Metal ◽  
Temperature Dependence ◽  
Thermal Annealing ◽  
Phenomenological Model ◽  
Metal Films ◽  
Mixing Efficiency ◽  
Thermal Spike ◽  
Significant Difference ◽  
Aluminum Substrates

ABSTRACTIon mixing experiments using Xe ions at temperatures ranging from 77K to about 450K were conducted on Al/Ni and Al/Pt couples. Evaporated polycrystalline Al films and large-grained Al crystals were used as substrates. Xenon irradiation of Al/Pt bilayers achieves considerable intermixing and a temperature dependence is observed. Only moderate interfacial mixing with little temperature dependence is observed in Al/Ni bilayers. The mixing efficiency of Al/Ni is consistent with the phenomenological model of thermal spike mixing, and so is the absence of a pronounced temperature dependence below 450K. No significant difference is noted in ion mixing of evaporated and large-grained Al substrates. In contrast to ion mixing, Al/Pt and Al/Ni samples behave similarly upon thermal annealing and form well-defined compounds. The results are also compared with Si/metal systems, where silicides can be formed readily by low temperature thermal annealing as well as by ion mixing of bilayer samples.

scholarly journals Refractive Indices of Ge and Si at Temperatures between 4–296 K in the 4–8 THz Region

2021 ◽  
Vol 11 (2) ◽  
pp. 487
Author(s):  
Mira Naftaly ◽  
Steve Chick ◽  
Guy Matmon ◽  
Ben Murdin
Keyword(s):  
Refractive Index ◽  
Fourier Transform ◽  
Temperature Dependence ◽  
Phenomenological Model ◽  
Transmission Mode ◽  
High Resistivity ◽  
Refractive Indices ◽  
Fourier Transform Spectrometer ◽  
Mode A

Refractive indices of high resistivity Si and Ge were measured at temperatures between 4–296 K and at frequencies between 4.2–7.7 THz using a Fourier-transform spectrometer (FTS) in transmission mode. A phenomenological model of the temperature dependence of the refractive index is proposed.

Calculation of the tilt angle and susceptibility for the α–β transition in quartz using a mean field model

2017 ◽  
Vol 31 (09) ◽  
pp. 1750092 ◽  
Author(s):  
H. Yurtseven ◽  
U. Ipekoğlu ◽  
S. Ateş
Keyword(s):  
Experimental Data ◽  
Phase Transition ◽  
Temperature Dependence ◽  
Tilt Angle ◽  
Phenomenological Model ◽  
Order Parameter ◽  
Field Model ◽  
Mean Field ◽  
Mean Field Model ◽  
The Mean

Tilt angle (order parameter) and the susceptibility are calculated as a function of temperature for the [Formula: see text]–[Formula: see text] transition in quartz using a Landau phenomenological model. The tilt angle as obtained from the model is fitted to the experimental data from the literature and the temperature dependence of the tilt angle susceptibility is predicted close to the [Formula: see text]–[Formula: see text] transition in quartz. Our results show that the mean field model explains the observed behavior of the [Formula: see text]–[Formula: see text] phase transition in quartz adequately and it can be applied to some related materials.

Phenomenological model of yield strength temperature dependence for irradiated materials

2010 ◽  
Vol 2010 (4) ◽  
pp. 292-295 ◽  
Author(s):  
V. V. Krasil’nikov ◽  
S. E. Savotchenko ◽  
A. A. Parkhomenko
Keyword(s):  
Yield Strength ◽  
Temperature Dependence ◽  
Phenomenological Model

ANALYSIS OF AC TRANSPORT MEASUREMENTS ON GDSR2RUCU2O8

2003 ◽  
Vol 17 (04n06) ◽  
pp. 910-915 ◽  
Author(s):  
A. VECCHIONE ◽  
D. ZOLA ◽  
C. NOCE ◽  
G. CARAPELLA ◽  
M. GOMBOS ◽  
...  
Keyword(s):  
Critical Temperature ◽  
Curie Temperature ◽  
Temperature Dependence ◽  
Phenomenological Model ◽  
Low Frequency ◽  
Onset Temperature ◽  
Transport Measurements ◽  
Current Voltage ◽  
In Series ◽  
Physical Quantities

Low frequency transport measurements have been performed on GdSr 2 RuCu 2 O 8 pellets. The current-voltage curves measured show an irreversible behavior in whole range of temperature explored. From these curve a Curie temperature TcM=133 K and a superconducting critical temperature TcS = 14 K , with an onset temperature TcO=33 K , have been deduced. A simple phenomenological model assuming a non-linear inductance in series with a resistance has been proposed to explain experimental current-voltage curves. Within this model, the temperature dependence of some physical quantities has been also investigated.

Temperature Dependence of the Critical Electron Dose for Fatty Acid Monolayers

1982 ◽  
Vol 40 ◽  
pp. 78-79
Author(s):  
Kenneth H. Downing ◽  
Robert M. Glaeser
Keyword(s):  
Electron Beam ◽  
Fatty Acid ◽  
Inelastic Scattering ◽  
Temperature Dependence ◽  
Structural Damage ◽  
Direct Result ◽  
Second Step ◽  
Strong Temperature Dependence ◽  
Electron Dose ◽  
Covalent Bonds

The structural damage of molecules irradiated by electrons is generally considered to occur in two steps. The direct result of inelastic scattering events is the disruption of covalent bonds. Following changes in bond structure, movement of the constituent atoms produces permanent distortions of the molecules. Since at least the second step should show a strong temperature dependence, it was to be expected that cooling a specimen should extend its lifetime in the electron beam. This result has been found in a large number of experiments, but the degree to which cooling the specimen enhances its resistance to radiation damage has been found to vary widely with specimen types.

Temperature Dependence of Magnetic Domains and Wall Structures

1972 ◽  
Vol 30 ◽  
pp. 496-497
Author(s):  
Sonoko Tsukahara ◽  
Tadami Taoka ◽  
Hisao Nishizawa
Keyword(s):  
Temperature Dependence ◽  
Domain Walls ◽  
Magnetic Domain ◽  
Iron Film ◽  
Objective Lens ◽  
Lorentz Microscopy ◽  
Domain Structures ◽  
Wall Structures ◽  
Crystal Films ◽  
Metallurgical Structure

The high voltage Lorentz microscopy was successfully used to observe changes with temperature; of domain structures and metallurgical structures in an iron film set on the hot stage combined with a goniometer. The microscope used was the JEM-1000 EM which was operated with the objective lens current cut off to eliminate the magnetic field in the specimen position. Single crystal films with an (001) plane were prepared by the epitaxial growth of evaporated iron on a cleaved (001) plane of a rocksalt substrate. They had a uniform thickness from 1000 to 7000 Å.The figure shows the temperature dependence of magnetic domain structure with its corresponding deflection pattern and metallurgical structure observed in a 4500 Å iron film. In general, with increase of temperature, the straight domain walls decrease in their width (at 400°C), curve in an iregular shape (600°C) and then vanish (790°C). The ripple structures with cross-tie walls are observed below the Curie temperature.

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