TY - JOUR
T1 - Magnetic phase diagram of the MnAs spin system
T2 - A computer simulation
AU - Petkov, V.
AU - Mikhov, M.
PY - 1985/7/10
Y1 - 1985/7/10
N2 - The MnAs spin system has been modelled as a three-dimensional Ising system under the assumption that the exchange interactions are independent of the external conditions (i, e. a rigid spin system). The magnetic behaviour of this system in magnetic fields of 20, 40, 60 and 90kOe has been studied. The order parameter m = M/M\ (where M is magnetisation) has been obtained by Monte Carlo simulation of an 8 x 8 x 6 spin system with hexagonal symmetry under periodic boundary conditions. The relaxation behaviour of m near Tc shows that the model system undergoes a first-order phase transition from a ferromagnetic into a paramagnetic state. The resulting magnetic phase diagram is in good agreement with the experimental one. The independent behaviour of the magnetic subsystem is shown to play an essential role in the transition mechanism.
AB - The MnAs spin system has been modelled as a three-dimensional Ising system under the assumption that the exchange interactions are independent of the external conditions (i, e. a rigid spin system). The magnetic behaviour of this system in magnetic fields of 20, 40, 60 and 90kOe has been studied. The order parameter m = M/M\ (where M is magnetisation) has been obtained by Monte Carlo simulation of an 8 x 8 x 6 spin system with hexagonal symmetry under periodic boundary conditions. The relaxation behaviour of m near Tc shows that the model system undergoes a first-order phase transition from a ferromagnetic into a paramagnetic state. The resulting magnetic phase diagram is in good agreement with the experimental one. The independent behaviour of the magnetic subsystem is shown to play an essential role in the transition mechanism.
UR - http://www.scopus.com/inward/record.url?scp=33746829295&partnerID=8YFLogxK
U2 - 10.1088/0022-3719/18/19/016
DO - 10.1088/0022-3719/18/19/016
M3 - Article
AN - SCOPUS:33746829295
VL - 18
SP - 3791
EP - 3795
JO - Journal of Physics C: Solid State Physics
JF - Journal of Physics C: Solid State Physics
SN - 0022-3719
IS - 19
ER -