34 citations · 99 across the 6 of their papers we have counts for
6 papers
Magnetoresistance of composites based on graphitic disks and cones
Jozef Černák, Geir Helgesen, Fredrik Sydow Hage +1
We have studied the magnetotransport of conical and disk-shaped nanocarbon particles in magnetic fields at temperatures $2\leq T\leq300\:\mathrm{K…
Magnetic properties of carbon nanodisk and nanocone powders
Jozef Cernak, Geir Helgesen, Jozef Kovac +2
We have investigated the magnetic properties of carbon powders which consist of nanodisks, nanocones, and a small fraction of carbon-black particles. Magnetization measurements wer…
Aggregation of magnetic holes in a rotating magnetic field
Jozef Černák, Geir Helgesen
We have experimentally investigated field induced aggregation of nonmagnetic particles confined in a magnetic fluid layer when rotating magnetic fields were applied. After applicat…
Self-assembly and dynamics of magnetic holes
Arne T. Skjeltorp, Jorgen Akselvoll, Kai De Lange Kistiansen +4
Nonmagnetic particles in magnetized ferrofluids have been denoted magnetic holes and are in many ways ideal model systems to test various forms of particle self assembly and dynami…
Dynamic roughening and fluctuations of dipolar chains
Renaud Toussaint, Geir Helgesen, Eirik G. Flekkøy
Nonmagnetic particles in a carrier ferrofluid acquire an effective dipolar moment when placed in an external magnetic field. This fact leads them to form chains that will roughen d…
Interaction model for magnetic holes in a ferrofluid layer
Renaud Toussaint, Jørgen Akselvoll, Eirik G. Flekkøy +2
Nonmagnetic spheres confined in a ferrofluid layer (magnetic holes) present dipolar interactions when an external magnetic field is exerted. The interaction potential of a microsph…