Nanocluster Magnetic Gel in Superfluid He-II

作者：Efimov V B^*; Lokhov A V; Mezhov Deglin L P; Dewhurst C; Nesvizhevsky V V; Kolmakov G V

来源：JETP Letters, 2014, 99(1): 32-36.

DOI：10.1134/S0021364014010044

The first results of the study of the structure of an impurity oxygen gel in superfluid He-II and in normal liquid helium have been obtained by the small-angle neutron scattering (SANS) method with cold neutrons. The angular dependence of the neutron scattering intensity I(q) indicates that the characteristic sizes of nanocluster aggregates forming a dispersive system (backbone) of an oxygen gel sample are distributed from 1 to approximate to 100 nm. According to the estimates made, if the working cell with superfluid helium cooled below 1.8 K is placed in a magnetic field of H %26gt;= 200 G, the magnetic structure of the nanocluster sample of oxygen gel, which is formed at the condensation of the flow of gaseous He-4 with the impurity of O-2 vapor on the surface of He-II, will be close to ferromagnetic.

• 出版日期2014-3