Structural phase transitions in lattices of magnetic bubbles
Gerasimchuk V. S., Gorobets Yu. I., Deville Kavelin K.
It is shown theoretically that a close-packed hexagonal lattice of magnetic bubbles of identical diameter can transform into a lattice of magnetic bubbles with different diameters as the temperature is lowered in a zero external field. The conditions for the existence of the latter lattice and for its transformation into a lattice of magnetic bubbles similar to the crystal lattice of graphite are determined.