On the deviation from a Curie-Weiss behavior of the ZnFe2O4 susceptibility: a combined ab-initio and Monte-Carlo approach
We present a numerical study of the magnetic properties of ZnFe2O4 using MonteCarlo simulations performed considering a Heisenberg model with antiferromagnetic couplings determined by Density Functional Theory. Our calculations predict that the magnetic susceptibility has a cusp-like peak centered a...
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| Autores principales: | , , , , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2019
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/107278 http://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC6354655&blobtype=pdf |
| Aporte de: |
| Sumario: | We present a numerical study of the magnetic properties of ZnFe2O4 using MonteCarlo simulations performed considering a Heisenberg model with antiferromagnetic couplings determined by Density Functional Theory. Our calculations predict that the magnetic susceptibility has a cusp-like peak centered at 13 K, and follows a Curie–Weiss behavior above this temperature with a high and negative Curie–Weiss temperature (Θ = −170 K). These results agree with the experimental data once extrinsic contributions that give rise to the deviation from a Curie–Weiss law are discounted. Additionally, we discuss the spin configuration of ZnFe2O4 below its ordering temperature, where the system presents a high degeneracy |
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