Ferroelectricity Driven by Orbital Resonance of Protons in CH3NH3Cl and CH3NH3Br

2022 ◽  
Author(s):  
Chu Xin Peng ◽  
Lei Meng ◽  
Yi Yang Xu ◽  
Tian Tian Xing ◽  
Miao Miao Zhao ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Magnetic Susceptibility ◽  
Orbital Resonance ◽  
Pyroelectric Current ◽  
Methylammonium Chloride

The β and γ phases of methylammonium chloride CH3NH3Cl and methylammonium bromide CH3NH3Br are identified to be ferroelectric via pyroelectric current and dielectric constant measurements. The magnetic susceptibility also exhibits...

scholarly journals Magnetic and Electrical Transport Properties of Vanadium Telluride

1980 ◽  
Vol 35 (7) ◽  
pp. 701-703 ◽  
Author(s):  
C. Prasad ◽  
R. A. Singh
Keyword(s):  
Electrical Conductivity ◽  
Dielectric Constant ◽  
Magnetic Susceptibility ◽  
Electrical Transport ◽  
Powdered Sample ◽  
Neel Temperature ◽  
Electrical Transport Properties ◽  
Néel Temperature ◽  
Paramagnetic Curie Temperature ◽  
Temperature Range

Measurements of the magnetic susceptibility of a powdered sample of VTe in the temperature range 90 - 700 K, and of the a.c. electrical conductivity (σ), thermoelectric power (θ) and dielectric constant (ε′) of pressed pellets of the compound in the temperature range 300 -1100 K are reported. The compound is found to be antiferromagnetic with Neel temperature 420 ± 5 K. The effective paramagnetic moment and paramagnetic Curie temperature are found to be 1.6 μB and - 250 K, respectively. The dependence of σ, θ and ε′ on temperature shows no anomaly at the Neel temperature and is indicative of the metallic nature of the compound.

EFFECTIVE P, T RESTORATION IN CHERN–SIMONS SUPERCONDUCTIVITY

1994 ◽  
Vol 08 (08n09) ◽  
pp. 561-570 ◽  
Author(s):  
S. S. MANDAL ◽  
S. RAMASWAMY ◽  
V. RAVISHANKAR
Keyword(s):  
Dielectric Constant ◽  
Magnetic Susceptibility ◽  
Normal State ◽  
Time Reversal ◽  
Finite Temperature ◽  
Narrow Range ◽  
Mean Field ◽  
Smooth Transition ◽  
The Mean ◽  
Chern Simons

We present an analysis of the finite temperature Chern–Simons superconductivity model within the mean field framework. Using analytical and numerical means we compute the changes in the magnetic susceptibility, conductivity, the dielectric constant, and the specific heat as the temperature is increased. Over a narrow range of temperatures the properties of the system show a smooth transition to the normal state. Accompanying this is the near vanishing of the off-diagonal conductivity, signifying the effective restoration of parity and time reversal symmetries.

scholarly journals Coumarin 4 Laser dye/PVP Polymer/Al2O3 Nanoparticle Thin Films Induced by Er: YAG Laser Radiation

2019 ◽  
Vol 54 (4) ◽  
Author(s):  
Mithaq M. Mehdy Al-Sultani
Keyword(s):  
Thin Films ◽  
Electrical Conductivity ◽  
Dielectric Constant ◽  
Magnetic Susceptibility ◽  
Electrical Properties ◽  
Response Time ◽  
Electrical Response ◽  
Laser Wavelength ◽  
Laser Dye ◽  
Yag Laser

In this paper, thin films were made of 10-4 mol/l of Coumarin 4 laser dye dissolved in ethanol, 0.3 g of PVP polymer and 0.04 g of Al2O3 nanoparticles. The electrical properties such as dielectric constant, phase velocity of laser photons inside the film, the film permittivity and permeability, medium impedance, electrical conductivity, skin depth, the electrical response time, magnetic susceptibility and dielectric time have been studied for the prepared thin films at two different Er:YAG laser wavelengths of 1645nm and 1617 nm based on various laser powers in one time and with changed laser exposure periods in the other time. It is observed that the highest laser power consolidates each value of dielectric constant, dielectric time, electrical conductivity, the electrical response time, magnetic susceptibility and the permeability of film because of increasing the abundant energy in films within laser irradiation. The most important conclusion is that the electrical properties were much higher for the prepared thin films irradiated with 1645nm Er: YAG laser wavelength than for those irradiated with 1617nm laser wavelength.

scholarly journals Experimental Study of the Phase Transition in (CH2)8(NH3)2FeCl4-xBrx(x = 0, 1 and 2)

1988 ◽  
Vol 41 (1) ◽  
pp. 85 ◽  
Author(s):  
MA Ahmed ◽  
MM EI-Desoky ◽  
FA Radwan
Keyword(s):  
Dielectric Constant ◽  
Dipole Moments ◽  
Entropy Change ◽  
Liquid Nitrogen Temperature ◽  
Melting Points ◽  
Electric Dipole Moments ◽  
Calorimetric Measurements ◽  
Pyroelectric Current ◽  
Constant E ◽  
Transition Points

The dielectric constant E and the pyroelectric current I p for the compounds (CH2)S(NH3hFeCI4_xBrx (x = 0, 1 and 2) have been measured in the range from the liquid nitrogen temperature up to near the melting points. Measurements of the dielectric constant have been carried out at various frequencies. A calculation of the electric dipole moments at the background and transition points is given. Calorimetric measurements have also been carried out and the values of the enthalpy change I::.H and entropy change I::.S are also reported.

The magnetic susceptibility, specific heat and dielectric constant of hexagonal YMnO3, LuMnO3and ScMnO3

2001 ◽  
Vol 13 (20) ◽  
pp. 4543-4552 ◽  
Author(s):  
D G Tomuta ◽  
S Ramakrishnan ◽  
G J Nieuwenhuys ◽  
J A Mydosh
Keyword(s):  
Dielectric Constant ◽  
Magnetic Susceptibility ◽  
Specific Heat

A near-room-temperature organic–inorganic hybrid ferroelectric: [C6H5CH2CH2NH3]2[CdI4]

2017 ◽  
Vol 53 (42) ◽  
pp. 5764-5766 ◽  
Author(s):  
Bo Huang ◽  
Lin-Ying Sun ◽  
Sha-Sha Wang ◽  
Jian-Yu Zhang ◽  
Cheng-Min Ji ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Room Temperature ◽  
Optical Switches ◽  
Inorganic Hybrid ◽  
Pyroelectric Current ◽  
Switching Material

The features of synchronously switchable dielectric constant, SHG, and pyroelectric current provide a promising multifunctional switching material applied in the field of electrical/optical switches and sensors at near room temperature.

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