Intrinsic magnetic relaxation in goethite

Effect of Goethite Coating on the Nuclear Magnetic Resonance Relaxation Signal in Sand

Nuclear magnetic resonance relaxation is a fast and well-known method to get a measure of pore size distributions. To obtain reliable results, one needs to get information about influences like internal gradients evoked by paramagnetic impurities on the NMR relaxation signal. Therefore, we did a series of longitudinal and transverse relaxation experiments of samples with variable paramagnetic c...

Anomalous Particle Size Dependence of Magnetic Relaxation Phenomena in Goethite Nanoparticles

By use of Mössbauer spectroscopy we have studied the magnetic properties of samples of goethite nanoparticles with different particle size. The spectra are influenced by fluctuations of the magnetization directions, but the size dependence is not in accordance with the Néel-Brown expression for superparamagnetic relaxation of the magnetization vectors of the particles as a whole. The data sugge...

magnetic resonance imaging in dentistry

چکیده ندارد.

Relaxation in magnetic nanostructures

Proton Magnetic Relaxation in Gases

Measurements of the longitudinal nuclear spin relaxation time, Ti, in molecular gases are analogous to non-resonant absorption measurements; Ti is determined primarily by that part of the spin-lattice interaction which couples free molecular states of the same energy. The contribution to Ti of matrix elements of the spin-lattice interaction between rotational states of different energy is quenc...