Soliton-Like Spin State in the A-Like Phase of 3He in Anisotropic Aerogel
Abstract
We have found a new stable spin state in the A-like phase of superfluid 3He confined to intrinsically anisotropic aerogel. The state can be formed by radiofrequency excitation applied while cooling through the superfluid transition temperature and its NMR properties are different from the standard A-like phase obtained in the limit of very small excitation. It is possible that this new state is formed by textural domain walls pinned by aerogel.

NMR on textural defects in superfluid 3He-A
Textural defects in the A phase are created in a slab geometry by an RF pulse and are stable in magnetic fields. The defects are observed as holes in NMR absorption signals with a field gradient and as a satellite peak in a homogeneous field. In order to create such defects, both the amplitude and the length of the RF pulse have to be larger than well defined thresholds.
Topological defects and coherent magnetization precession of in aerogel
Abstract We have observed for the first time the formation of the region with coherent precession of magnetization (CPM) in superfluid 3 He in aerogel covered by solid monolayers of 4 He . The signal of CPM has been observed by pulsed NMR and by CW NMR. By playing with the magnetic field gradient we were able to distinguish the spatial position of the region of CPM as well as to determine the long-scale inhomogenity of the order parameter. We have observed an evidence for existence of an enormous number of topological defects in superfluid 3 He in aerogel.