For [Zr(DFO)]+ at low temperatures, resonances were broadened compared to those at higher temperatures, and at all temperatures measured, the broadness of some methylene resonances prohibited observation of coupling constants and splitting patterns.
A high temperature magnetic resonance compatible furnace for real time in situ monitoring of materials, processes, and chemical reactions with magnetic resonance imaging and spectroscopy is described.
The performance of twin thermoacoustic prime mover is evaluated in terms of onset temperature difference, resonance frequency and pressure amplitude of the acoustic waves by varying the resonator length and charge pressures of fluid medium nitrogen.
The performance is measured in terms of onset temperature difference, resonance frequency and pressure amplitude of the oscillations generated from twin TAHE.
This work illustrates the influence of stack parameters such as plate thickness (PT) and plate spacing (PS) with resonator length on the performance of thermoacoustic engine, which are measured in terms of onset temperature difference, resonance frequency and pressure amplitude using air as a working fluid.
Such a material will have a zero coefficient of temperature with resonance frequency around a particular temperature.
With increasing temperature, the resonance peak progressively blue-shifts while the transverse mode at 524 nm remains unchanged.
After the sample annealing, only one narrow Lorentzian EPR signal with temperature-dependent resonance magnetic field position, linewidth and signal intensity was observed in SiO2 C nanopowders.
At room temperature these resonances disappear and a conductance value of 0.76 e 2/h is measured at V bg = 0 V.
At room temperature the resonances corresponding to lower NV− concentrations are practically buried in the phonon-dominated (T_{1}) [Figure 7(a)], at 77 K, however, they are well visible [Figure 7(b)], with the exception of the W5 and E8 samples.
