Diffuse phase transitions and random-field-induced domain states of the ''relaxor'' ferroelectric

V Westphal, W Kleemann, MD Glinchuk - Physical Review Letters, 1992 - APS
The diffuseness of the ferroelectric phase transition in PbMg 1/3 Nb 2/3 O 3 is proposed to
be due to quenched random electric fields originating from charged compositional …

Domain state model for exchange bias. I. Theory

U Nowak, KD Usadel, J Keller, P Miltényi, B Beschoten… - Physical review B, 2002 - APS
For a model system consisting of a ferromagnetic layer coupled to a diluted,
antiferromagnetic layer extensive Monte Carlo simulations are performed. Exchange bias is …

[图书][B] Phase transitions in combinatorial optimization problems: basics, algorithms and statistical mechanics

AK Hartmann, M Weigt - 2006 - books.google.com
A concise, comprehensive introduction to the topic of statistical physics of combinatorial
optimization, bringing together theoretical concepts and algorithms from computer science …

Defect-induced ferromagnetism in undoped and Mn-doped zirconia thin films

J Zippel, M Lorenz, A Setzer, G Wagner, N Sobolev… - Physical Review B …, 2010 - APS
A doping-independent ferromagnetic hysteresis at 300 and 5 K was found for both undoped
and Mn-doped zirconia thin films with up to 20 at.% Mn. The lack of Mn-induced magnetic …

Exact ground-state properties of disordered Ising systems

J Esser, U Nowak, KD Usadel - Physical Review B, 1997 - APS
Exact ground states are calculated with an integer optimization algorithm for two-and three-
dimensional site-diluted Ising antiferromagnets in a field (DAFF) and random field Ising …

Modeling exchange bias microscopically

U Nowak, A Misra, KD Usadel - Journal of magnetism and magnetic …, 2002 - Elsevier
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 …

Universality in three dimensional random-field ground states

AK Hartmann, U Nowak - The European Physical Journal B-Condensed …, 1999 - Springer
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 …

Magnetization dynamics in quasiperiodic magnonic crystals

R Mehta, B Rana, S Saha - Journal of Physics: Condensed …, 2024 - iopscience.iop.org
Quasiperiodic magnonic crystals, in contrast to their periodic counterparts, lack strict
periodicity which gives rise to complex and localised spin wave spectra characterized by …

Monte Carlo studies of Ising spin glasses and random field systems

H Rieger - Annual Reviews of Computational Physics II, 1995 - World Scientific
We review recent numerical progress in the study of finite dimensional strongly disordered
magnetic systems like spin glasses and random field systems. In particular we report in …

Exchange Bias Induced by the Spin-Glass-Like State in a Te-Rich FeGeTe van der Waals Ferromagnet

S Hu, X Cui, Z Yue, P Wang, K Ohnishi, SQ Wu… - Nano Letters, 2024 - ACS Publications
We have experimentally investigated the mechanism of the exchange bias in 2D van der
Waals (vdW) ferromagnets by means of the anomalous Hall effect (AHE) together with the …