scholarly journals Nuclear Spin-System Dynamics Caused by NMR Saturation for Arbitrary Spin Temperature

1997 ◽  
Vol 98 (4) ◽  
pp. 795-805 ◽  
Author(s):  
L. Buishvili ◽  
T. Buishvili ◽  
R. Khomeriki
Keyword(s):  
System Dynamics ◽  
Spin System ◽  
Nuclear Spin ◽  
Arbitrary Spin ◽  
Spin Temperature ◽  
Nuclear Spin System

scholarly journals Nuclear Spin-system Dynamics affected by Double Inhomogeneity under Multipulse Excitation in Statistical Tensor Formalism

1998 ◽  
Vol 51 (2) ◽  
pp. 415
Author(s):  
L. N. Shakhmuratova
Keyword(s):  
System Dynamics ◽  
Spin System ◽  
Nuclear Spin ◽  
Pulse Sequence ◽  
Inhomogeneous Broadening ◽  
Pulse Excitation ◽  
Repetition Period ◽  
Transient Effects ◽  
Statistical Tensor ◽  
Nuclear Spin System

New coherent transient effects formed due to double inhomogeneity, i.e. inhomogeneity in the main precession frequency (Larmor inhomogeneous broadening) and of the rf amplitude expressed in frequency units (Rabi inhomogeneous broadening), in˚uencing the nuclear spin- system dynamics during rf pulse excitation, have been predicted and investigated by use of the method of concatenation of perturbation factors (CPF) in statistical tensors (ST) formalism. Multiple pulse excitation under double inhomogeneity is examined when the repetition period of a pulse sequence is shorter than T1.

Dynamic Polarization in Single Crystals of CaF2 Containing H Atoms as Paramagnetic Impurities

1969 ◽  
Vol 24 (11) ◽  
pp. 1737-1745
Author(s):  
P. Zegers
Keyword(s):  
Single Crystals ◽  
Spin System ◽  
Nuclear Spin ◽  
Microwave Power ◽  
Modulation Frequency ◽  
Thermal Contact ◽  
Dynamic Polarization ◽  
Spin Temperature ◽  
Nuclear Spin System ◽  
Paramagnetic Centres

Formulae for dynamic polarization in solids having an inhomogeneous electron spin system and a nuclear spin system which can be described by one single spin temperature were derived. It was assumed that the spin temperature, in the rotating frame of those paramagnetic centres which fulfil ωe=ω+ωn or ωe = ω-ωn j can increase due to thermal contact with the nuclear spin- system brought about by high microwave power. Field fluctuations, at the positions of the para­magnetic centres, due to relaxation flipping of surrounding nuclei and paramagnetic centres were also taken into account. Formulae obtained for the enhancement and polarization time as a func­tion of microwave power and for the enhancement as a function of field modulation frequency and -amplitude agreed well with the experimental results in CaF2 single crystals containing H atoms.

Kinetics, hysteresis and nonadiabaticity of the phase transitions in the nuclear spin system of copper

1990 ◽  
Vol 165-166 ◽  
pp. 783-784 ◽  
Author(s):  
A.J. Annila ◽  
K.N. Clausen ◽  
A.S. Oja ◽  
K. Siemensmeyer ◽  
M. Steiner ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Spin System ◽  
Nuclear Spin ◽  
Nuclear Spin System

scholarly journals Detection of Ferromagnetic Domains in a Two-Dimensional Nuclear-Spin System

1986 ◽  
Vol 57 (23) ◽  
pp. 2943-2946 ◽  
Author(s):  
L. J. Friedman ◽  
S. N. Ytterboe ◽  
H. M. Bozler ◽  
A. L. Thomson ◽  
M. C. Cross
Keyword(s):  
Spin System ◽  
Nuclear Spin ◽  
Two Dimensional ◽  
Ferromagnetic Domains ◽  
Nuclear Spin System

Nuclear Spin System of LiquidHe3

1956 ◽  
Vol 102 (5) ◽  
pp. 1205-1208 ◽  
Author(s):  
Louis Goldstein
Keyword(s):  
Spin System ◽  
Nuclear Spin ◽  
Nuclear Spin System

A Nuclear Spin System at Negative Temperature

1951 ◽  
Vol 81 (2) ◽  
pp. 279-280 ◽  
Author(s):  
E. M. Purcell ◽  
R. V. Pound
Keyword(s):  
Spin System ◽  
Nuclear Spin ◽  
Negative Temperature ◽  
Nuclear Spin System

scholarly journals Current-induced control of the electron-nuclear spin system in semiconductors on a micrometer scale

2014 ◽  
Vol 251 (9) ◽  
pp. 1777-1785 ◽  
Author(s):  
Yuansen Chen ◽  
Jungtaek Kim ◽  
Joachim Puls ◽  
Fritz Henneberger ◽  
Gerd Bacher
Keyword(s):  
Spin System ◽  
Nuclear Spin ◽  
Nuclear Spin System ◽  
Micrometer Scale
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