Spin-glass surface disorder on the magnetic behaviour of antiferromagnetic small particles
作者： Vanessa Souza Leite , Wagner Figueiredo
DOI: 10.1016/J.PHYSA.2004.11.036
关键词: Spin glass 、 Physics 、 Condensed matter physics 、 Spins 、 Magnetic field 、 Hysteresis 、 Coercivity 、 Heisenberg model 、 Antiferromagnetism 、 Particle
摘要: Abstract We studied the magnetic properties of an antiferromagnetic small particle Ising spins. The is represented by a two-dimensional array spins, where coupling between spins in core antiferromagnetic, and its surface modelled shell with competing interactions, simulating spin-glass type ordering at surface. investigated this model mean-field approximation Monte Carlo simulations. behaviour was as function temperature external field. Some experimental findings observed real nanoparticles, like hysteresis, shifted loops coercive field, are obtained for model. showed that these strongly depend on degree disorder.
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B. Martínez, X. Obradors, Ll. Balcells, A. Rouanet, C. Monty, Low Temperature Surface Spin-Glass Transition in γ - Fe 2 O 3 Nanoparticles Physical Review Letters. ,vol. 80, pp. 181- 184 ,(1998) , 10.1103/PHYSREVLETT.80.181
Birger Bergersen, Michael Plischke, Equilibrium statistical physics ,(1988)
Monte Carlo methods in statistical physics Monte Carlo methods in statistical physics. ,(1979) , 10.1007/978-3-642-82803-4
Jooyoung Lee, New Monte Carlo algorithm: Entropic sampling. Physical Review Letters. ,vol. 71, pp. 211- 214 ,(1993) , 10.1103/PHYSREVLETT.71.211
S F Edwards, P W Anderson, Theory of spin glasses Journal of Physics F: Metal Physics. ,vol. 5, pp. 965- 974 ,(1975) , 10.1088/0305-4608/5/5/017
H Kachkachi, H Mahboub, Surface anisotropy in nanomagnets: transverse or Néel? Journal of Magnetism and Magnetic Materials. ,vol. 278, pp. 334- 341 ,(2004) , 10.1016/J.JMMM.2003.12.1354
M. Dimian, H. Kachkachi, Effect of surface anisotropy on the hysteretic properties of a magnetic particle Journal of Applied Physics. ,vol. 91, pp. 7625- 7627 ,(2002) , 10.1063/1.1450846
X. Zianni, J. A. Blackman, K. N. Trohidou, Surface effects on the magnetic behavior of antiferromagnetic particles Journal of Applied Physics. ,vol. 84, pp. 2795- 2800 ,(1998) , 10.1063/1.368392
K.N. Trohidou, X. Zianni, J.A. Blackman, Magnetic Behavior of Antiferromagnetic and Composite Ferro-Antiferromagnetic Nanoparticles Physica Status Solidi (a). ,vol. 189, pp. 305- 309 ,(2002) , 10.1002/1521-396X(200202)189:2<305::AID-PSSA305>3.0.CO;2-#
Roy J. Glauber, Time‐Dependent Statistics of the Ising Model Journal of Mathematical Physics. ,vol. 4, pp. 294- 307 ,(1963) , 10.1063/1.1703954