Surface Relaxation Times of Conduction-Electron Spins in Superconductors and Normal Metals

1978 ◽  
Vol 41 (12) ◽  
pp. 805-808 ◽  
Author(s):  
R. Meservey ◽  
P. M. Tedrow
Keyword(s):  
Conduction Electron ◽  
Relaxation Times ◽  
Surface Relaxation ◽  
Electron Spins ◽  
Normal Metals

Pulsed ESR Study of the Conduction Electron Spin Center in μc-Si:H

1996 ◽  
Vol 452 ◽  
Author(s):  
Jiang-Huai Zhou ◽  
Satoshi Yamasaki ◽  
Junichi Isoya ◽  
Kazuyuki Ikuta ◽  
Michio Kondo ◽  
...  
Keyword(s):  
Conduction Electron ◽  
Relaxation Times ◽  
Lattice Relaxation ◽  
Inversion Recovery ◽  
Spin Lattice Relaxation ◽  
Recovery Method ◽  
Amorphous Phases ◽  
Spin Lattice ◽  
Pulse Inversion ◽  
Spin Center

AbstractThe spin-lattice relaxation times (T1) of conduction electron (CE) and dangling bond (DB) centers in μc-Si:H have been directly measured using the 3-pulse inversion recovery method. For both CE and DB, the inversion recovery curve follows a stretched exponential form. T1 of DB is about twice the T1 of CE, however the temperature dependence of T1 seems to be the same for both CE and DB and can be approximated by T−4 While the DB echo decay is modulated by both 29Si and 1H nuclei, we found no modulation of the CE echo decay by the H nucleus, indicating that CE centers are located in H-depleted phases in μc-Si:H. The modulation results are direct evidence that CE centers are located in the crystalline grains and DB centers in the amorphous phases.

Surface Rotational Dynamics of Liquids Confined in Nanopores

1996 ◽  
Vol 464 ◽  
Author(s):  
J.-P. Korb ◽  
L. Malier ◽  
F. Cros ◽  
Shu Xu ◽  
J. Jonas
Keyword(s):  
Relaxation Times ◽  
Nmr Relaxation ◽  
Rotational Dynamics ◽  
Surface Relaxation ◽  
Nanoporous Silica ◽  
Silica Glasses ◽  
H Nmr ◽  
Fast Exchange ◽  
Nmr Relaxation Times ◽  
Different Time Scales

ABSTRACT2H NMR relaxation times of selectively deuterated polar molecules confined to a set of calibrated nanoporous silica glasses are reported. These experiments, combined with the consideration of different time scales in the theory of surface relaxation, show how confinement effects can provide detailed information on the rotational dynamics of temporarily adsorbed liquid layers in presence of biphasic fast exchange.

scholarly journals A study of Supported Poly (n-butyl methacrylate) (PBMA) Thin Polymer Films Near the Glass Transition Temperature

2017 ◽  
Vol 14 (1) ◽  
pp. 31-36 ◽  
Author(s):  
Rami Omari ◽  
Gilbert Ayuk
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Correlation Functions ◽  
Relaxation Times ◽  
Surface Relaxation ◽  
Butyl Methacrylate ◽  
Surface Dynamics ◽  
Thin Polymer ◽  
Bulk Relaxation

The glass transition temperature and the surface dynamics of poly (butyl methacrylate) (PBMA) films have been studied using a phase-modulated ellipsometer equipped with a home-built sample cell with temperature controller. Experiments were performed for a range of temperatures, both above and below the glass transition temperature (Tg). In our study the glass transition temperature was obtained by plotting the ellipticity, as a function of temperature using the data from the ellipsometric cooling scan. the correlation functions governing the fluctuations were calculated at each temperature from the time-dependent fluctuations in film thickness as a function of temperature using ellipsometry data collected at 50 Hz frequency. The results indicate that at temperatures well above Tg, the correlation functions obey a simple exponential decay. However, as Tg is approached, the correlation functions are best fitted with a stretched exponential relation, indicating a broad distribution of relaxation times. In addition, the temperature dependence of surface relaxation process has been found to be much weaker compared to the bulk relaxation.

Interaction between localized and conduction-electron spins in the high-Tcsuperconductor Gd:EuBa2Cu3O6+x

1996 ◽  
Vol 53 (18) ◽  
pp. 12430-12435 ◽  
Author(s):  
D. Shaltiel ◽  
C. Noble ◽  
J. Pilbrow ◽  
D. Hutton ◽  
E. Walker
Keyword(s):  
Conduction Electron ◽  
Electron Spins

scholarly journals Strong confinement-induced engineering of the g factor and lifetime of conduction electron spins in Ge quantum wells

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
Anna Giorgioni ◽  
Stefano Paleari ◽  
Stefano Cecchi ◽  
Elisa Vitiello ◽  
Emanuele Grilli ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Conduction Electron ◽  
Electron Spins ◽  
G Factor ◽  
Strong Confinement
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