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| Natura: | Artículo científico |
| Lingua: | en |
| Pubblicazione: |
Sociedad Mexicana de Física A.C.
2012
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| Accesso online: | https://www.redalyc.org/articulo.oa?id=57030392020 |
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Sommario:
- Synthesis, structural, magnetic and ferroelectric characterization of biferroic Bi3 R2 FeTi3 O15 O.D. Gil Novoa D.A. Landínez Téllez J. Roa-Rojas Física, Astronomía y Matemáticas New materials rietveld refinement electric hysteresis magnetic susceptibility In this work we report for the first time synthesis of polycrystalline samples of Bi5 FeTi3 O15 (BFTO) and Bi3 R2 FeTi3 O15 compounds with R= Gd, Dy. The materials were synthesized by the standard solid-state reaction recipe from high purity powders of Bi2 O3 , Gd2 O3 , Dy2 O3 , Fe2 O3 and TiO2 , submitted to thermal treatments of 650, 800 and 810◦ C by 10, 20 and 24 h, respectively. We analyzed the structural characteristics by XRD technique, obtaining pure phase in all compounds with orthorhombic crystal structure. Polarization (P-E) measurements were performed, showing hysteretic behavior, which indicates that the compounds can be used as ferroelectric materials. Magnetic susceptibility measurements as a function of temperature were obtain with a MPMS SQUID Magnetometer between 5 and 300 K, on the application of an applied magnetic field of 0.01 T. Results reveal that materials evidence paramagnetic behavior. Using the Curie-Weiss fitting, we obtain the characteristic parameters C and θ0 . From the Curie constant, we determine the effective magnetic moment, which is in agreement with the theoretical expected value for Gd+3 and Dy+3 cations, calculated by the Hund’s rule. 2012 artículo científico 0035-001X https://www.redalyc.org/articulo.oa?id=57030392020 en http://www.redalyc.org/revista.oa?id=570 Revista Mexicana de Física application/pdf Sociedad Mexicana de Física A.C. Revista Mexicana de Física (México) Num.2 Vol.58