Monte Carlo simulations of antiferromagnetic small particles
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| Natura: | Artículo científico |
| Lingua: | en |
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Sociedade Brasileira de Física
2004
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| _version_ | 1876464421910347776 |
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| author | Vanessa S. Leite |
| author_facet | Vanessa S. Leite |
| contents | Monte Carlo simulations of antiferromagnetic small particles Vanessa S. Leite Wagner Figueiredo Física, Astronomía y Matemáticas We performed Monte Carlo simulations considering two different models for antiferromagnetic small particleswith Ising spins. The spins of the particle are disposed at the sites of the two dimensional arrays with coordinationnumbers z = 4 and z = 6, around a central spin. The core spins interact antiferromagnetically and thespins at the surface of the particle are disordered. In the first model, we consider an antiferromagnetic core surroundedby a disordered surface of the spin-glass type. In the second model, the core is still antiferromagnetic,but some bonds at the surface are broken. We determined the hysteresis curves, the zero-field-cooling (ZFC)and field-cooling (FC) curves. We have shown that the model with a disordered surface of the spin-glass typefits better the experimental measurements determined for the antiferromagnetic nanoparticles. 2004 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46434224 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.2A Vol.34 |
| format | Artículo científico |
| id | redalyc_46434224 |
| institution | Redalyc |
| language | en |
| publishDate | 2004 |
| publisher | Sociedade Brasileira de Física |
| spellingShingle | Monte Carlo simulations of antiferromagnetic small particles Vanessa S. Leite Física, Astronomía y Matemáticas Monte Carlo simulations of antiferromagnetic small particles Vanessa S. Leite Wagner Figueiredo Física, Astronomía y Matemáticas We performed Monte Carlo simulations considering two different models for antiferromagnetic small particleswith Ising spins. The spins of the particle are disposed at the sites of the two dimensional arrays with coordinationnumbers z = 4 and z = 6, around a central spin. The core spins interact antiferromagnetically and thespins at the surface of the particle are disordered. In the first model, we consider an antiferromagnetic core surroundedby a disordered surface of the spin-glass type. In the second model, the core is still antiferromagnetic,but some bonds at the surface are broken. We determined the hysteresis curves, the zero-field-cooling (ZFC)and field-cooling (FC) curves. We have shown that the model with a disordered surface of the spin-glass typefits better the experimental measurements determined for the antiferromagnetic nanoparticles. 2004 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46434224 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.2A Vol.34 |
| title | Monte Carlo simulations of antiferromagnetic small particles |
| topic | Física, Astronomía y Matemáticas |
| url | https://www.redalyc.org/articulo.oa?id=46434224 |