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Magnetic Relaxation of Ideal Superparamagnets Studied by Monte‐Carlo‐Simulation
Author(s) -
Kostinek J.,
Markum H.,
Rauch H.
Publication year - 1982
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221120207
Subject(s) - monte carlo method , spins , condensed matter physics , antiferromagnetism , relaxation (psychology) , ideal (ethics) , superparamagnetism , magnetization , dynamic monte carlo method , heisenberg model , coupling constant , physics , statistical physics , materials science , magnetic field , quantum mechanics , mathematics , psychology , social psychology , philosophy , statistics , epistemology
The local and total magnetization of small magnetic particles are calculated using a Monte‐Carlo‐procedure and assuming a Heisenberg nearest‐neighbor interaction. The ideal magnetic system relaxes from a non‐equilibrium to an equilibrium state and the observed time constant is obtained in units of Monte‐Carlo steps for various temperatures. Further calculations deal with a system having an antiferromagnetic coupling for the spins within the surface layer. Such systems may simulate superparamagnetic particles with an oxide layer on their surfaces.