Linear temperature dependence of the magnetic susceptibility of brominated (SN)x

2008 ◽  
pp. 438-438
Author(s):  
J. C. Scott ◽  
J. D. Kulick ◽  
G. B. Street
Keyword(s):  
Magnetic Susceptibility ◽  
Temperature Dependence ◽  
Linear Temperature Dependence ◽  
Linear Temperature

Tetraphenylarsonium-tetraoxoosinat (VII), AsPh4[OsO4] / Tetraphenylarsonium Tetraoxoosm ate (VII), AsPh4[OsO4]

1984 ◽  
Vol 39 (2) ◽  
pp. 259-261 ◽  
Author(s):  
Edgar Bilger ◽  
Jürgen Pebler ◽  
Rainer Weber ◽  
Kurt Dehnicke
Keyword(s):  
Magnetic Susceptibility ◽  
Temperature Dependence ◽  
Ir Spectrum ◽  
Linear Temperature Dependence ◽  
Linear Temperature ◽  
Tetrahedral Structure ◽  
Voltammetric Measurements

AsPh4[OsO4] is prepared by reaction of OsO4 with AsPh4I in CH2C12 solution. According to the IR spectrum , the [OsO4]⊖ ion adopts a distorted tetrahedral structure. The reciprocal magnetic susceptibility displays linear temperature dependence in the range of 4.2 to 140 K (μeff( = 1.25 B.M., 0 - 2.6°). The results of cyclo-voltammetric measurements are in accordance with a reversible oneelectron process OsO4/OsO4⊖; the redoxpotential was found to be 104(2) and 100(3) mV resp. versus SCE

Magnetic Susceptibility and Electrical Resistivity of Dilute Chromium–Titanium Alloys

1971 ◽  
Vol 49 (23) ◽  
pp. 3010-3023 ◽  
Author(s):  
C. H. Chiu ◽  
M. H. Jericho ◽  
R. H. March
Keyword(s):  
Electrical Resistivity ◽  
Magnetic Susceptibility ◽  
Temperature Dependence ◽  
Titanium Alloys ◽  
Electron Scattering ◽  
Linear Temperature Dependence ◽  
Linear Temperature ◽  
Dilute Alloys ◽  
Extra Electron ◽  
Pure Chromium

We report measurements of the magnetic susceptibility and the electrical resistivity of chromium–titanium alloys containing Ti concentrations of up to 0.6 at.%. The measurements were performed between 320 and 4.2 K. A very rapid depression of both the Néel temperature and the spin-flip temperature on alloying was observed. The paramagnetic susceptibility of pure chromium and the alloys displayed a linear temperature dependence and it is suggested that thermal expansion effects might be responsible for this linear temperature dependence. The analysis of the electrical resistivity results points to the existence of an extra electron scattering mechanism above TN in pure chromium as well as the dilute alloys.

Parametric Models of Ultrasonic Piezoelectric Transducers over a Wide Temperature Range

2015 ◽  
Vol 2015 (HiTEN) ◽  
pp. 000266-000272 ◽  
Author(s):  
Steven A. Morris ◽  
Jeremy Townsend
Keyword(s):  
Dielectric Constant ◽  
Temperature Dependence ◽  
Coupling Coefficient ◽  
Thin Disk ◽  
Piezoelectric Transducers ◽  
Parametric Models ◽  
Model Parameters ◽  
Linear Temperature Dependence ◽  
Linear Temperature ◽  
Wide Range

Piezoelectric ultrasonic transducers are used extensively in well logging and logging-while-drilling applications for pulse-echo operation. We present a method of modeling the operation of ultrasonic thin-disk piezoelectric transducers over a wide range of temperatures. The model is based on using Redwood's version of Mason's model of thin-disk transducers. Laboratory measurements in the oven of non-backed transducers in air are used to extract the Mason model parameters as a function of temperature. Derived parameters are frequency-thickness constant, dielectric constant, and thickness mode coupling coefficient. A fourth parameter, bulk density, is measured independently and assumed constant over temperature. Temperature dependence of frequency thickness constant and coupling coefficient are modeled as linear temperature coefficients. Temperature dependence of the dielectric constant must be specified as a table because of the non-linear temperature dependence of that parameter.

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