Dynamic Melting of Driven Abrikosov Lattices in an Amorphous Mo_xGe_1−x Film in Tilted Field

Random organization of vortices under an anisotropic condition

“…In the transient process, the vortex-vortex (v-v) interaction is considered to be isotropic. On the other hand, under the tilted (θ = 36 • ) field, an ordered vortex configuration both for the undriven case and fast-driven steady-state case shows an expanded hexagonal lattice by a factor of 1/cosθ(≈ 1.24) along the tilt direction [15][16][17][18]. Thus, the v-v interaction along the perpendicular direction (p-direction) to the tilt direction is stronger than that along the tilt direction (t-direction).…”

“…However, when the magnetic field is tilted from normal to the sample plane, the vortex configuration and the resultant inter-vortex interaction become anisotropic. Recent studies have revealed that when the magnetic field is tilted at θ from normal to the sample plane, hexagonal vortex lattice is expanded by a factor of 1/cosθ along the tilt direction [15][16][17][18]. More recently, we have found that the relation between the dynamic melting field and the velocity of the driven anisotropic lattice changes depending on the direction of the dc drive [18], indicating that not only the static vortices but also the moving vortices feel the anisotropic interaction.…”