Oleksandr V. Pylypovskyi, Denis D. Sheka, Yuri Gaididei
Phys. Rev. B 85, 224401 (2012), 10.1103/PhysRevB.85.224401
8 pages, 7 figures
The micromagnetic singularity, the so–called Bloch point, can form a metastable state in the nanosphere. We classify possible types of Bloch points and derive analytically the shape of magnetization distribution inside diﬀerent Bloch point. We show that external gradient ﬁeld can stabilize the Bloch point: the shape of the Bloch point becomes radial–dependent one and compute the magnetization structure of the nanosphere, which is in a good agrement with performed spin–lattice simulations.
Bloch point relaxation in a nanosphere
|External magnetic field
|Time is measured in
Here is lattice constant.