Nonlinear motion of magnetization in superfluid /sup 3/He-B. The leggett-Takagi spin relaxation effect in the pulsed NMR configuration

Journal Article · Thu Apr 01 04:00:00 EST 1982 · J. Low Temp. Phys.; (United States)

DOI:https://doi.org/10.1007/BF00682024· OSTI ID:5434041

Ooiwa, K

The recovery motion of the magnetization and the associated motion of the order parameter for the pulsed NMR geometry in superfluid /sup 3/He-B are investigated by solving the Brinkman equations including the Leggett-Takagi spin relaxation effect. It is found that the relaxation of longitudinal magnetization strongly depends upon the initial tip angles according to both the numerical and adiabatic perturbation methods. For large tip angles, these equations yield square-root and linear types of recovery. For small tip angles near the magic angle theta/sub 0/ = cos/sup -1/(-1/4), the longitudinal magnetization does not recover the full equilibrium value, and the transverse magnetization shows time-dependent resonance shifts arising from the relaxation effect.

• Research Organization: Department of Physics, Science University of Tokyo, Tokyo, Japan
• OSTI ID: 5434041
• Journal Information: J. Low Temp. Phys.; (United States), Journal Name: J. Low Temp. Phys.; (United States) Vol. 47:1; ISSN JLTPA
• Country of Publication: United States
• Language: English

Related Subjects

640450* -- Fluid Physics-- Superfluidity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
EVEN-ODD NUCLEI
HELIUM 3
HELIUM 3 B
HELIUM ISOTOPES
ISOTOPES
LIGHT NUCLEI
MAGNETIC RESONANCE
MAGNETIZATION
NONLINEAR PROBLEMS
NUCLEAR MAGNETIC RESONANCE
NUCLEI
ORDER PARAMETERS
PULSES
RELAXATION
RESONANCE
STABLE ISOTOPES
TIME DEPENDENCE