Identical anomalous Raman relaxation exponent in a family of single ion magnets: towards reliable Raman relaxation determination?

2020 ◽  
Vol 49 (34) ◽  
pp. 11942-11949 ◽  
Author(s):  
Gabriela Handzlik ◽  
Michał Magott ◽  
Mirosław Arczyński ◽  
Alena M. Sheveleva ◽  
Floriana Tuna ◽  
...  
Keyword(s):  
Solid State ◽  
Temperature Dependence ◽  
Relaxation Process

The results described herein suggest that the exponent n for the temperature dependence of the Raman relaxation process in the series of solid-state diluted isostructural LnIII SIMs should be identical.

Temperature Dependence of Lithium Anode Voiding in Argyrodite Solid-State Batteries

2021 ◽  
Author(s):  
Dominic Spencer Jolly ◽  
Ziyang Ning ◽  
Gareth O. Hartley ◽  
Boyang Liu ◽  
Dominic L. R. Melvin ◽  
...  
Keyword(s):  
Solid State ◽  
Temperature Dependence ◽  
Lithium Anode ◽  
Solid State Batteries

scholarly journals Quasi-synchronous thermocompensation for ISFET-based ionometric devices. Part 1: Theory and simulation

2021 ◽  
pp. 36-44
Author(s):  
O. S. Pavluchenko ◽  
О. L. Kukla
Keyword(s):  
Solid State ◽  
Temperature Dependence ◽  
Field Effect Transistors ◽  
Circuit Simulation ◽  
Intrinsic Noise ◽  
Liquid Electrolyte ◽  
Practical Implementation ◽  
Transducer Output ◽  
In Vivo Analysis

Solid-state ion selective transducers, as an alternative to the traditional liquid electrolyte-filled glass electrodes, are known for over four decades now, and find their use in various areas of industry and applied science, such as in vivo analysis of the ions activity in biological and medical research, monitoring of toxic and aggressive environments, and biosensors design. However, along with potential advantages — short response time, small size, chemical inertness and durability — solid-state devices also possess certain inherent drawbacks — namely intrinsic noise, drift and instability of sensing properties, and cross-sensitivity to various interfering environmental conditions — that inhibit their widespread acceptance. Further improvement of the fabrication technology and methodology of application of these devices is thus still an important practical task even today. This paper is a first part of the two-part work dedicated to the problem of compensating the temperature dependence of a solid-state ion selective transducer output. Specifically, presented work considers the possibility of using ion-selective field-effect transistors (ISFET) that serve as primary transducers in an ionometric device, as temperature sensors. This allows compensating the temperature dependence of ionometric signal without substantial complication of the ionometer structure, and eliminates the need to include a separate thermometric channel as part of the instrument. Ionometric and thermometric channels are combined into a unified measuring path, with the sensor functions separated in time. The ISFET operation modes are switched by changing polarity of the bias voltage, and thus direction of the current flowing through the sensor. The authors propose a corresponding secondary transducer structure and simplified schematic illustrating the implementation of its key components. The concept’s applicability is supported by the circuit simulation results. Some aspects of the practical implementation of the proposed concept will be presented further in the upcoming second part of the paper.

scholarly journals The Dynamic Properties of 5Cb Filled with Aerosil Particles Investigated by Pcs

1999 ◽  
Vol 559 ◽  
Author(s):  
F.M. Aliev ◽  
M. Kreuzer ◽  
Yu.P. Panarin
Keyword(s):  
Liquid Crystal ◽  
Temperature Dependence ◽  
Relaxation Process ◽  
Nematic Liquid Crystal ◽  
Broad Spectrum ◽  
Dynamic Properties ◽  
Relaxation Times ◽  
Correlation Spectroscopy ◽  
Relaxation Processes ◽  
Optoelectronic Application

ABSTRACTNematic liquid crystal filled with Aerosil particles, a prospective composite material for optoelectronic application, has been investigated by static light scattering and Photon Correlation Spectroscopy (PCS). The Aerosil particles in filled nematic liquid crystals (FN) form a network structure with LC domains about 2500 Å in size with a random distribution of the director orientation of each domain.We found that the properties of 5CB are considerably affected by the network. The N-I phase transition in filled 5CB was found to be smeared out and depressed. PCS experiments show that two new relaxation processes appear in filled 5CB in addition to the director fluctuation process in bulk. The slow relaxation process, with a broad spectrum of relaxation times, is somewhat similar to the slow decay, which is observed in confined nematic liquid crystal.The middle frequency process was assigned to the director fluctuations in the surface layer formed at the particle-LC interface. The decay function describing this relaxation process is a stretched exponential (β ≍ 0.7). The temperature dependence of the relaxation times of the middle frequency obeys the Vogel-Rilcher law. Such a temperature dependence, accompanied by a broad spectrum of relaxation times suggests that the dynamics of the director fluctuations near the Aerosil particle-LC interface is glass-like.

Few-Parameter Equation of State of the Shock Adiabat with Allowance for Melting

2008 ◽  
Vol 3 (4) ◽  
pp. 52-63
Author(s):  
Evgeny I. Kraus
Keyword(s):  
Solid State ◽  
Equation Of State ◽  
Temperature Dependence ◽  
Thermodynamic Functions ◽  
Melting Curve ◽  
Shock Adiabat ◽  
Elastic Component ◽  
Configuration Entropy ◽  
Model Equations ◽  
State Body

The model equations for thermodynamic functions of liquid status based on volume and temperature dependence of Gruneisen coefficient are offered. Thermal components are described by the Debye’s model. Despite the perfect analogy to solid-state body the distinction in an elastic component of energy and pressures is taken into consideration when deriving the equations. The configuration entropy is embedded into thermodynamic functions of liquid. It describes a disorderliness measure of liquid and results in the final values of the entropy when temperature formally amounts to zero. The melting curve as the boundary between phases is constructed.

Spekktroskopische Untersuchungen in der Festkörperchemie, IX / Spectroscopic Investigations in the Solid-State Chemistry, IX

1975 ◽  
Vol 30 (3-4) ◽  
pp. 198-201 ◽  
Author(s):  
Paul K. Burkert ◽  
Frank Hutter ◽  
Detlev Koth
Keyword(s):  
Solid State ◽  
Temperature Dependence ◽  
Temperature Coefficient ◽  
Asymmetry Parameter ◽  
Lattice Parameters ◽  
Coupling Constants ◽  
Solid State Chemistry ◽  
Spectroscopic Investigations ◽  
Experimental Correlation ◽  
The Absolute

The four 185Re, 187Re—NQR-transitions of RbReO4 were measured. From the NQR-coupling constants, asymmetry-parameter and normal temperature-coefficient in the range of 77-300°K one can conclude, that the anomalons temperature dependence of the NQR-frequencies of NH4ReO4 is not caused by the absolute values of certain lattice parameters.An experimental correlation of the Re—NQR-coupling constants of scheelite-structured perrhenates with the length of the elementar cell was found and discussed.

Optical Absorptions in Metal Sodium: The Temperature Dependence in the Liquid State

1974 ◽  
Vol 29 (3) ◽  
pp. 462-468
Author(s):  
N. C. Haider
Keyword(s):  
Perturbation Theory ◽  
Solid State ◽  
Temperature Dependence ◽  
Electron Density ◽  
Electron Energy ◽  
Density Of States ◽  
Optical Conductivity ◽  
Liquid State ◽  
Present Calculation ◽  
Electron Density Of States

The temperature dependence of optical absorptions in liquid Na is calculated. The electron energy values are obtained to second order in perturbation theory which are then used to determine the electron density of states. The density of states plots show some structure similar to those noted in the solid state. The optical conductivity in the liquid state is found to increase with the temperature as in the solid state. The present calculation for the optical conductivity gives a rather sharp peak around ħ ω = 1.7 eV. These results are in better agreement with the existing experimental results

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