scholarly journals Theory of mixed-state effect on NMR relaxation measurements in iron pnictide superconductors

2011 ◽  
Vol 84 (22) ◽  
Author(s):  
Yi Gao ◽  
Jian-Xin Zhu ◽  
C. S. Ting ◽  
Wu-Pei Su
Keyword(s):  
Mixed State ◽  
Nmr Relaxation ◽  
Iron Pnictide ◽  
State Effect ◽  
Relaxation Measurements ◽  
Pnictide Superconductors

scholarly journals Mixed-state effect on the low-energy spin dynamics in optimally-doped iron pnictide superconductors

2014 ◽  
Vol 501 ◽  
pp. 32-35
Author(s):  
Y. Gao ◽  
T. Zhou ◽  
H.X. Huang ◽  
C.S. Ting ◽  
P.Q. Tong
Keyword(s):  
Mixed State ◽  
Spin Dynamics ◽  
Low Energy ◽  
Iron Pnictide ◽  
State Effect ◽  
Pnictide Superconductors

scholarly journals Freeze–Thaw Effect on Road Concrete Containing Blast Furnace Slag: NMR Relaxometry Investigations

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3288
Author(s):  
Liliana Maria Nicula ◽  
Ofelia Corbu ◽  
Ioan Ardelean ◽  
Andrei Victor Sandu ◽  
Mihai Iliescu ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Nmr Relaxation ◽  
Invasive Technique ◽  
Freeze Thaw ◽  
Nmr Relaxometry ◽  
Main Technique ◽  
Relaxation Measurements ◽  
Furnace Slag ◽  
Standard Techniques

The present work investigates the effect of freeze–thaw cycles on the porosity of three mixtures of road concrete containing blast furnace slag in comparison with two mixtures made with conventional materials. The main technique used in our investigations is nuclear magnetic resonance (NMR) relaxometry. This permitted the extraction of information with respect to the freeze–thaw effect on pore-size distribution, which influences both the mechanical strength and the molecular transport through the material. Moreover, by using this technique, the structure of the air voids was analyzed for the entire pore system in the cement paste and the aggregate particles. The samples under study were first dried in a vacuum oven and then saturated with water or cyclohexane where the distribution of the transverse relaxation times of the protons was recorded. The NMR relaxation measurements were performed on samples extracted from specimens maintained at 300 freeze–thaw cycles and on control samples extracted from specimens kept in water during the freeze–thaw period. Scanning Electron Microscopy (SEM) was used to analyze the microstructure of concrete samples in order to obtain information about the pore sizes and the distance between them. The results from the NMR relaxation measurements were consistent with those obtained by using standard techniques for determining the porosity and the freeze–thaw resistances. The investigations made it possible to establish the optimal composition of blast furnace slag that can be incorporated into road concrete compositions. This non-invasive technique can also complete standard techniques for assessing the porosity and the progress of internal cracks during the freeze–thaw test.

Small jump of specific heat and small gap in iron pnictide superconductors

2010 ◽  
Vol 470 ◽  
pp. S368-S369 ◽  
Author(s):  
N. Nakai ◽  
H. Nakamura ◽  
Y. Ota ◽  
Y. Nagai ◽  
N. Hayashi ◽  
...  
Keyword(s):  
Specific Heat ◽  
Iron Pnictide ◽  
Pnictide Superconductors

scholarly journals Electrodynamics of electron-doped iron pnictide superconductors: Normal-state properties

2010 ◽  
Vol 82 (5) ◽  
Author(s):  
N. Barišić ◽  
D. Wu ◽  
M. Dressel ◽  
L. J. Li ◽  
G. H. Cao ◽  
...  
Keyword(s):  
Normal State ◽  
Iron Pnictide ◽  
Pnictide Superconductors ◽  
Normal State Properties

NMR relaxation measurements in solid H2 at low ortho-H2 concentrations

1977 ◽  
Vol 28 (5-6) ◽  
pp. 415-441 ◽  
Author(s):  
Robert F. Buzerak ◽  
Moses Chan ◽  
Horst Meyer
Keyword(s):  
Nmr Relaxation ◽  
Relaxation Measurements

Dipolar spectral densities from off-resonance 1H NMR relaxation measurements

1995 ◽  
Vol 233 (5-6) ◽  
pp. 545-549 ◽  
Author(s):  
H Desvaux ◽  
P Berthault ◽  
N Birlirakis
Keyword(s):  
1H Nmr ◽  
Nmr Relaxation ◽  
Spectral Densities ◽  
Relaxation Measurements

Enhancing signal-to-noise ratio and resolution in low-field NMR relaxation measurements using post-acquisition digital filters

2018 ◽  
Vol 57 (9) ◽  
pp. 616-625 ◽  
Author(s):  
Tatiana Monaretto ◽  
Andre Souza ◽  
Tiago Bueno Moraes ◽  
Victor Bertucci-Neto ◽  
Corinne Rondeau-Mouro ◽  
...  
Keyword(s):  
Digital Filters ◽  
Signal To Noise Ratio ◽  
Nmr Relaxation ◽  
Signal To Noise ◽  
Low Field ◽  
Relaxation Measurements ◽  
Low Field Nmr ◽  
Noise Ratio
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