Evidence for the role of fluxoids in enhancing NMR spin-lattice relaxation and implications for intrinsic pinning of the flux lattice in organic superconductors

1993 ◽  
Vol 70 (19) ◽  
pp. 2956-2959 ◽  
Author(s):  
S. M. De Soto ◽  
C. P. Slichter ◽  
H. H. Wang ◽  
U. Geiser ◽  
J. M. Williams
Keyword(s):  
Lattice Relaxation ◽  
Organic Superconductors ◽  
Spin Lattice Relaxation ◽  
Spin Lattice ◽  
Flux Lattice

scholarly journals The role of the glassy dynamics and thermal mixing in the dynamic nuclear polarization and relaxation mechanisms of pyruvic acid

2014 ◽  
Vol 16 (48) ◽  
pp. 27025-27036 ◽  
Author(s):  
M. Filibian ◽  
S. Colombo Serra ◽  
M. Moscardini ◽  
A. Rosso ◽  
F. Tedoldi ◽  
...  
Keyword(s):  
Relaxation Rate ◽  
Dynamic Nuclear Polarization ◽  
Pyruvic Acid ◽  
Nuclear Polarization ◽  
Lattice Relaxation ◽  
Spin Lattice Relaxation ◽  
Relaxation Rates ◽  
Thermal Mixing ◽  
Spin Lattice

In pyruvic acid containing 15 mM trityl below 4 K 13C polarization and spin–lattice relaxation rates are proportional to the spin–lattice relaxation rate of electrons, suggesting an efficient thermal mixing scenario.

The role of the ordinary and anharmonic Raman processes in Rb2PtI6

1978 ◽  
Vol 56 (11) ◽  
pp. 1461-1467 ◽  
Author(s):  
Robert G. C. McElroy ◽  
Robin L. Armstrong
Keyword(s):  
Nuclear Spin ◽  
Lattice Relaxation ◽  
Experimental Results ◽  
Spin Lattice Relaxation ◽  
Spin Lattice ◽  
Raman Process ◽  
Nuclear Spin Lattice Relaxation ◽  
Rare Opportunity

Measurements of iodine nuclear spin lattice relaxation in Rb2PtI6 provide a rare opportunity to directly measure the separate contributions of the ordinary and anharmonic Raman processes. It is shown that for this crystal one may separately determine W1 and W2 and that these rates may be uniquely related to the two Raman processes. The experimental results show that the anharmonic Raman process is dominant but not to the total exclusion of the ordinary Raman process.

scholarly journals Role of NH4 ions in successive phase transitions of perovskite type (NH4)2ZnX4 (X = Cl, Br) by 1H MAS NMR and 14N NMR

RSC Advances ◽  
2018 ◽  
Vol 8 (21) ◽  
pp. 11316-11323 ◽  
Author(s):  
Ae Ran Lim
Keyword(s):  
Phase Transitions ◽  
Chemical Shifts ◽  
Lattice Relaxation ◽  
Lattice Relaxation Time ◽  
Spin Lattice Relaxation ◽  
1H Mas Nmr ◽  
Spin Lattice ◽  
Successive Phase ◽  
Perovskite Type

The 1H chemical shifts and the spin-lattice relaxation time, T1ρ, in the rotating frame of (NH4)2ZnX4 (X = Cl, Br) are observed in order to investigate local phenomena related to successive phase transitions.

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