Observation of a topological transition in the 3A vortices
Abstract
Vortices in 3A in low magnetic fields (H<=20 mT) have been studied by ultrasonics. A first-order phase change between two vortex types, with dissimilar sound absorption, has been found. The magnetic field at the transition is on the order of the dipolar field Hd. The observed change occurs between continuous vortex textures with different topological charges in the d^ field (where d^ is the magnetic anisotropy vector).
- Publication:
-
Physical Review Letters
- Pub Date:
- December 1990
- DOI:
- 10.1103/PhysRevLett.65.3293
- Bibcode:
- 1990PhRvL..65.3293P
- Keywords:
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- 67.50.-b