10 papers
Modeling exchange bias microscopically
U. Nowak, A. Misra, K. D. Usadel
Exchange bias is a horizontal shift of the hysteresis loop observed for a ferromagnetic layer in contact with an antiferromagnetic layer. Since exchange bias is related to the spin…
Domain State Model for Exchange Bias
U. Nowak, A. Misra, K. D. Usadel
Monte Carlo simulations of a system consisting of a ferromagnetic layer exchange coupled to a diluted antiferromagnetic layer described by a classical spin model show a strong depe…
Transverse ordering of an antiferromagnet in a field with oblique angle to the easy axis
M. Acharyya, U. Nowak, K. D. Usadel
Motivated by the recent experimental observations [Phys Rev B 57 R11051 (1998)] of transverse spin ordering in FeBr_2 induced by a magnetic field with oblique angle to the easy axi…
Universality in Three Dimensional Random-Field Ground States
A. K. Hartmann, U. Nowak
We investigate the critical behavior of three-dimensional random-field Ising systems with both Gauss and bimodal distribution of random fields and additional the three-dimensional…
Influence of the temperature on the depinning transition of driven interfaces
U. Nowak, K. D. Usadel
We study the dynamics of a driven interface in a two-dimensional random-field Ising model close to the depinning transition at small but finite temperatures T using Glauber dynamic…
Modified Scaling Relation for the Random-Field Ising Model
U. Nowak, K. D. Usadel, J. Esser
We investigate the low-temperature critical behavior of the three dimensional random-field Ising ferromagnet. By a scaling analysis we find that in the limit of temperature $T \to…