RT Journal Article
T1 Multiferroism Induced by Spontaneous Structural Ordering inAntiferromagnetic Iron Perovskites
A1 García-Martín, Susana
A1 Martínez de Irujo Labalde, Xabier
A1 Goto, Masato
A1 Urones-Garrote, Esteban
A1 Amador, Ulises
A1 Ritter, Clemens
A1 Amano Patino, Midori E
A1 Koedtruad, Anucha
A1 Tan, Zhenhong
A1 Shimakawa, Yuichi
AB 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 Gd(Tb), Ba, and Ca atoms with the ordering of 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 the TOOT sequence in a unit cell. A polar moment of 33.0 μC/cm2 for the Gd-oxide (23.2 μC/cm2 for the Tb one) is determined from the displacements of the cations, mainly Fe, and oxygen atoms along the b-axis. These oxides present antiferromagnetic ordering doubling the c-axis, and the magnetic structure in the Tb compound remains up to 690 K, which is one of the highest transition temperatures reported in Fe perovskites.
PB American Chemical Society
SN ISSN: 0897-4756
YR 2019
FD 2019
LK https://hdl.handle.net/20.500.14352/12905
UL https://hdl.handle.net/20.500.14352/12905
LA eng
DS Docta Complutense
RD 12 abr 2025