Temperature-dependent Magnetodielectric, Magnetoimpedance, and Magnetic field controlled dielectric relaxation response in KBiFe2O5

2022 ◽  
pp. 169047
Author(s):  
K. Chandrakanta ◽  
R. Jena ◽  
P. Pal ◽  
Md.F. Abdullah ◽  
D.P. Sahu ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Dielectric Relaxation ◽  
Relaxation Response ◽  
Temperature Dependent

scholarly journals Experimental Observation of Temperature-Driven Topological Phase Transition in HgTe/CdHgTe Quantum Wells

2019 ◽  
Author(s):  
Maksim Zholudev ◽  
Aleksandr Kadykov ◽  
Mikhail Fadeev ◽  
Michal Marcinkiewicz ◽  
Sandra Ruffenach ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Phase Transition ◽  
Quantum Wells ◽  
Topological Insulator ◽  
Critical Magnetic Field ◽  
Topological Phase ◽  
Temperature Dependent ◽  
Transition Parameter ◽  
Topological Phase Transition ◽  
Band Insulator

We report on comparison between temperature-dependent magneto¬absorption and magnetotransport spectroscopy of HgTe/CdHgTe quantum wells in terms of detection of phase transition between topological insulator and band insulator states. Our results demonstrate that temperature-dependent magnetospectroscopy is a powerful tool to discriminate trivial and topological insulator phases, yet magnetotransport method is shown to have advantages for clear manifestation of the phase transition with accurate quantitative values of transition parameter (i.e. critical magnetic field Bc).

scholarly journals Temperature-Dependent Solid-State NMR Proton Chemical-Shift Values and Hydrogen Bonding

2021 ◽  
Author(s):  
Alexander A. Malär ◽  
Laura A. Völker ◽  
Riccardo Cadalbert ◽  
Lauriane Lecoq ◽  
Matthias Ernst ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Hydrogen Bonding ◽  
Solid State ◽  
Chemical Shift ◽  
Hydrogen Bonds ◽  
Solid State Nmr ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Proton Chemical Shift ◽  
Temperature Dependent

Temperature-dependent NMR experiments are often complicated by rather long magnetic-field equilibration times, for example occurring upon a change of sample temperature. We demonstrate that the fast temporal stabilization of the magnetic field can be achieved by actively stabilizing the temperature which allows to quantify the weak temperature dependence of the proton chemical shift which can be diagnostic for the presence of hydrogen bonds. Hydrogen bonding plays a central role in molecular recognition events from both fields, chemistry and biology. Their direct detection by standard structure determination techniques, such as X-ray crystallography or cryo-electron microscopy, remains challenging due to the difficulties of approaching the required resolution, on the order of 1 Å. We herein explore a spectroscopic approach using solid-state NMR to identify protons engaged in hydrogen bonds and explore the measurement of proton chemical-shift temperature coefficients. Using the examples of a phosphorylated amino acid and the protein ubiquitin, we show that fast Magic-Angle Spinning (MAS) experiments at 100 kHz yield sufficient resolution in proton-detected spectra to quantify the rather small chemical-shift changes upon temperature variations.<br>

Temperature dependent dielectric relaxation study of tetrahydrofuran in methanol and ethanol at microwave frequency using time domain technique

1999 ◽  
Vol 82 (3) ◽  
pp. 245-253 ◽  
Author(s):  
Ajay Chaudhari ◽  
Prakash Khirade ◽  
Raghubar Singh ◽  
S.N. Helambe ◽  
N.K. Narain ◽  
...  
Keyword(s):  
Dielectric Relaxation ◽  
Time Domain ◽  
Microwave Frequency ◽  
Temperature Dependent ◽  
Relaxation Study

Effect of organo-clay on the dielectric relaxation response of silicone rubber

2009 ◽  
Vol 19 (2) ◽  
pp. 025002 ◽  
Author(s):  
N Gharavi ◽  
M Razzaghi-Kashani ◽  
N Golshan-Ebrahimi
Keyword(s):  
Dielectric Relaxation ◽  
Silicone Rubber ◽  
Relaxation Response ◽  
Organo Clay
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