A study of helium-3 nuclear magnetic relaxation mechanism in contact with 20 nm DyF nanoparticles.

The spin kinetics of adsorbed and liquid He in contact with a mixture of LaF (99.67 %) and DyF (0.33 %) 20 nm powders at temperatures of 1.

A study of the size and clustering effects of DyF samples.

The magnetic properties of DyF powders with a particle size of 16 nm-7 μm were studied. The saturation magnetization decreases with decreasing particle size. It was shown that magnetic moments are ordered according to the density function of the Lorentz distribution, and the disorder parameter decreases with increasing particle size.

Size effect of DyF nanoparticles on Curie temperature.

A series of DyF nanoparticles samples were synthesized by a hydrothermal treatment in an autoclave at 140 °C, 160 °C, 200 °C, and 230 °C for 24 h. The samples were characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), and temperature dependence of magnetic susceptibility. It was found that DyF particles possessed an ellipsoidal shape and size varying from 16 to 225 nm.

TheHe nuclear magnetic relaxation in nematically ordered AlOaerogels: effects ofHe and nitrogen pre-plating.

The results ofHe gas pulsed NMR spin-lattice relaxation study in high-porosity (84.9%-97.9%) nematically ordered AlOaerogels at 1.

Anisotropic reduced diffusion in dilute liquid He-He mixture in ordered aerogel.

We report on the first observation of He diffusion anisotropy in He-He liquid mixture confined in ordered aerogels at 1.5-4.2 K temperatures.