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http://hdl.handle.net/10637/14797Multiferroism Induced by Spontaneous Structural Ordering in Antiferromagnetic Iron Perovskites
| Título : | Multiferroism Induced by Spontaneous Structural Ordering in Antiferromagnetic Iron Perovskites |
| Autor : | Martínez de Irujo-Labalde, Xabier Goto, Masato Urones-Garrote, Esteban Amador Elizondo, Ulises Julio Ritter, Clemens Amano Patino, Midori Koedtruad, Anucha Tan, Zhenhong Shimakawa, Yuichi García-Martín, Susana |
| Materias: | Cations; Crystal structure; Layers; Oxides; Perovskites |
| Editorial : | American Chemical Society |
| Citación : | Xabier Martínez de Irujo-Labalde, Masato Goto, Esteban Urones-Garrote, Ulises Amador, Clemens Ritter, Midori E. Amano Patino, Anucha Koedtruad, Zhenhong Tan, Yuichi Shimakawa, and Susana García-Martín, Multiferroism Induced by Spontaneous Structural Ordering in Antiferromagnetic Iron Perovskites. Chemistry of Materials 2019 31 (15), 5993-6000. DOI: 10.1021/acs.chemmater.9b02716 |
| Resumen : | Room temperature multiferroism in polycrystalline antiferromagnetic Fe-perovskites is reported for the first time. In the perovskite-type oxides RE1.2Ba1.2Ca0.6Fe3O8 (RE = Gd, Tb) the interplay of layered ordering of the Gd(Tb), Ba and Ca atoms with the ordering of the FeO4-tetrahedra (T) and FeO6-octahedra (O) results in a polar crystal structure. The layered structure consists of the stacking sequence of RE/Ca-RE/Ca-Ba-RE/Ca layers in combination with TOOT sequence in a unit cell. A polar moment of 33.0 μC/cm2 for the Gd-oxide (30.1 μC/cm2 for the Tb one) is determined from displacements of the cations, mainly Fe, and oxygen atoms along the b-axis. These oxides present antiferromagnetic ordering doubling the c-axis, the magnetic structure in the Tb-compound remains up to 690 K, which is one of the highest transition temperatures reported in Fe-perovskites. |
| URI : | http://hdl.handle.net/10637/14797 |
| Derechos: | http://creativecommons.org/licenses/by-nc-nd/4.0/deed.es |
| ISSN : | 1520-5002 |
| Fecha de publicación : | 17-jul-2019 |
| Centro : | Universidad San Pablo-CEU |
| Aparece en las colecciones: | Facultad de Farmacia |
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