scholarly journals Effect of zero field splitting interactions on the paramagnetic relaxation enhancement of nuclear spin relaxation rates in solution

1993 ◽  
Vol 98 (2) ◽  
pp. 912-921 ◽  
Author(s):  
Robert R. Sharp
Keyword(s):  
Spin Relaxation ◽  
Nuclear Spin ◽  
Paramagnetic Relaxation ◽  
Paramagnetic Relaxation Enhancement ◽  
Nuclear Spin Relaxation ◽  
Zero Field ◽  
Relaxation Rates ◽  
Zero Field Splitting ◽  
Field Splitting

Electron and nuclear spin relaxation in paramagnetic transition-metal complexes with S = 1. The effects of a non-zero average zero-field splitting on the spin energy levels

1978 ◽  
Vol 31 (3) ◽  
pp. 475 ◽  
Author(s):  
DT Pegg ◽  
DM Doddrell
Keyword(s):  
Transition Metal Complexes ◽  
Spin Relaxation ◽  
Energy Levels ◽  
Nuclear Spin Relaxation ◽  
Zero Field ◽  
Zero Field Splitting ◽  
Field Splitting ◽  
Electron Spin Relaxation ◽  
Spin Lattice ◽  
Splitting Constant

The effects of a non-zero average zero-field splitting on electron spin relaxation in paramagnetic (S = 1) complexes is treated theoretically. The spin-lattice interaction is postulated to be a simple scalar P(t). S process with correlation time Ti. This process is assumed not to modulate the zero-field splitting which, however, is modulated by the molecular tumbling. The frequency dependence of the nuclear relaxation time (Tl) now depends on the magnitude of the zero-field splitting constant (D), and, for large values of D, the value of T1 is independent of the applied field strength.

NUCLEAR RELAXATION RATES, PENETRATION DEPTH, AND ENERGY-DEPENDENT GAP FUNCTIONS IN HIGH-Tc SUPERCONDUCTORS

1992 ◽  
Vol 06 (18) ◽  
pp. 1145-1150 ◽  
Author(s):  
Q. P. LI ◽  
ROBERT JOYNT
Keyword(s):  
Penetration Depth ◽  
Spin Relaxation ◽  
Nuclear Spin ◽  
High Temperature Superconductors ◽  
Gap Function ◽  
Gap Functions ◽  
Nuclear Spin Relaxation ◽  
Relaxation Rates ◽  
Relaxation Experiments ◽  
Energy Dependent

We study the experimental consequences of a gap function which is odd in energy. This type of gap may occur in high temperature superconductors. We show that nuclear spin relaxation experiments can be used to probe the "particle-hole parity" of a gap function. We find that an exponent α=1/3 which characterizes the energy dependence is in agreement with the currently available experimental data of both the nuclear spin relaxation rate (∝T(2-α)/α) and the electromagnetic penetration depth (∝T(1-α)/α).

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