Chain Flexibility and31P NMR Spin−Lattice Relaxation Measurements on Melts of Halogenated Poly(thionylphosphazenes)

1997 ◽  
Vol 30 (22) ◽  
pp. 6869-6872 ◽  
Author(s):  
R. Jaeger ◽  
G. J. Vancso ◽  
D. Gates ◽  
Y. Ni ◽  
I. Manners
Keyword(s):  
Lattice Relaxation ◽  
Spin Lattice Relaxation ◽  
Chain Flexibility ◽  
Spin Lattice ◽  
Relaxation Measurements

NMR studies of alkali intercalted carbon nanotubes

2003 ◽  
Vol 772 ◽  
Author(s):  
M. Schmid ◽  
C. Goze-Bac ◽  
M. Mehring ◽  
S. Roth ◽  
P. Bernier
Keyword(s):  
Carbon Nanotubes ◽  
Lattice Relaxation ◽  
Spin Lattice Relaxation ◽  
Energy Storage Devices ◽  
Nmr Studies ◽  
Storage Devices ◽  
Spin Lattice ◽  
Relaxation Measurements ◽  
Resonance Spin ◽  
Walled Carbon Nanotubes

AbstractLithium intercalted carbon nanotubes have attracted considerable interest as perspective components for energy storage devices. We performed 13C Nuclear Magnetic Resonance spin lattice relaxation measurements in a temperature range from 4 K up to 300 on alkali intercalated Single Walled Carbon Nanotubes in order to investigate the modifications of the electronic properties. The density of states at the Fermi level were determined for pristine, lithium and cesium intercalated carbon nanotubes and are discussed in terms of intercalation and charge transfer effects.

Novel spin dynamics in ferrimagnetic molecular chains from NMR and μSR spin–lattice relaxation measurements

2004 ◽  
Vol 272-276 ◽  
pp. 1087-1088 ◽  
Author(s):  
E. Micotti ◽  
A. Lascialfari ◽  
A. Rigamonti ◽  
S. Aldrovandi ◽  
A. Caneschi ◽  
...  
Keyword(s):  
Spin Dynamics ◽  
Lattice Relaxation ◽  
Spin Lattice Relaxation ◽  
Spin Lattice ◽  
Relaxation Measurements

scholarly journals Spin-lattice relaxation measurements and spin conversion in methane below 1 K

1981 ◽  
Vol 42 (7) ◽  
pp. 159-162 ◽  
Author(s):  
B. Bouchet ◽  
H. Glättli
Keyword(s):  
Lattice Relaxation ◽  
Spin Lattice Relaxation ◽  
Spin Conversion ◽  
Spin Lattice ◽  
Relaxation Measurements

Incommensurability and Domain Structure of K2SbF5

2002 ◽  
Vol 57 (6-7) ◽  
pp. 456-460
Author(s):  
A. M. Panich ◽  
L. A. Zemnukhova ◽  
R. L. Davidovich
Keyword(s):  
Relaxation Time ◽  
Phase Transitions ◽  
Lattice Relaxation ◽  
Lattice Relaxation Time ◽  
Spin Lattice Relaxation ◽  
Temperature Phase ◽  
X Ray Diffraction ◽  
Spin Lattice ◽  
Relaxation Measurements ◽  
Increasing Temperature

Phase transitions and incommensurability in K2SbF5 have been studied by means of 123Sb NQR spectra and spin-lattice relaxation measurements. The phase transitions occur at 117, 135 and 260 K. The line shape and temperature dependence of the spin-lattice relaxation time T1 at 135 to 260 K are characteristic for an incommensurate state with a plane wave modulation regime. At 117 to 135 K a distinct fine structure of the NQR spectra has been observed. The X-ray diffraction pattern of this phase is interpreted as a coexistence of two modulation waves along the a and b axis with wave vectors (a*/6 + b*/6) and (a*/2 + b*/2), respectively. The best interpretation that fits our NQR data is a coexistence of two domains, the structures of which are modulated with different periods in such a manner that each domain exhibits only one of the aforementioned modulation waves. Redistribution of line intensities with the variation of temperature shows that one of the domains becomes energetically preferable on cooling and is transformed into the low temperature phase at 117 K. The 123SbNQR measurements in K2SbF5 show unusually short values of T1, which become close to the spin-spin relaxation time T2 with increasing temperature. - Pacs: 61.44.Fw, 64.60, 64.70, 64.70.Rh, 76.60

Study of Li Diffusion on Metal and Semiconductor Surfaces via NQI Presented at the XVth International Symposium on Nuclear Quadrupole Interactions

2000 ◽  
Vol 55 (1-2) ◽  
pp. 15-20
Author(s):  
H. J. Jänsch
Keyword(s):  
Crystal Surface ◽  
Lattice Relaxation ◽  
Spin Lattice Relaxation ◽  
Β Decay ◽  
Spin Lattice ◽  
Quadrupole Interactions ◽  
Nuclear Quadrupole Interactions ◽  
Nuclear Spin Lattice Relaxation ◽  
Relaxation Measurements ◽  
Nuclear Quadrupole

Nuclear magnetic resonance has been used to study the diffusion of lithium on a Ru(001) single crystal surface. The quadrupolar interaction of the radioactive probe nucleus 8Li was utilized for this. In an online experiment the 8Li nuclei are produced, thermalized and highly polarized before they land on the surface studied, the parity violating β-decay revealing the sought after NMR/NQI nuclear information through the spatial asymmetry of the decay electrons. As a function of substrate temperature, alkali metal coverage and magnetic field the nuclear spin-lattice relaxation measurements show the existence of two distinctly different diffusion barriers on the surface, valued at 0.45 eV and 0.15 eV. The former is attributed to jumps from step to terrace sites, whereas the latter is the barrier between adjacent terrace sites. On the substrate Si(l 11)7x7 the relaxation measurements suggest a much higher diffusion barrier around 0.8 eV.

Rapid surface area determination via NMR spin-lattice relaxation measurements

1987 ◽  
Vol 53 (1) ◽  
pp. 39-47 ◽  
Author(s):  
P.J. Davis ◽  
D.P. Gallegos ◽  
D.M. Smith
Keyword(s):  
Surface Area ◽  
Lattice Relaxation ◽  
Spin Lattice Relaxation ◽  
Spin Lattice ◽  
Relaxation Measurements ◽  
Surface Area Determination ◽  
Area Determination

scholarly journals Determination of intramolecular microdynamical characteristics in solution of the cyclic hexadepsipeptide antibiotic pristinamycin IA from13C spin lattice relaxation measurements

Biopolymers ◽  
1982 ◽  
Vol 21 (5) ◽  
pp. 1005-1009 ◽  
Author(s):  
R. E. A. Callens ◽  
M. J. O. Anteunis ◽  
F. A. M. Borremans
Keyword(s):  
Lattice Relaxation ◽  
Spin Lattice Relaxation ◽  
Spin Lattice ◽  
Relaxation Measurements
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