In-situ formation of barium ferrite in iron-doped “tetragonal tungsten bronze”: Elaboration of room temperature multiferroic composites
Language
en
Article de revue
This item was published in
Journal of Magnetism and Magnetic Materials. 2009, vol. 321, n° 11, p. 1773-1777
Elsevier
English Abstract
Recent studies of ceramics of formula Ba<sub>2</sub>LnFeNb<sub>4</sub>O<sub>15</sub> (Ln=rare earth) with the “tetragonal tungsten bronze” (TTB) structure have correlated their room temperature multiferroics properties to ...Read more >
Recent studies of ceramics of formula Ba<sub>2</sub>LnFeNb<sub>4</sub>O<sub>15</sub> (Ln=rare earth) with the “tetragonal tungsten bronze” (TTB) structure have correlated their room temperature multiferroics properties to the occurrence of barium ferrite parasitic phases. This work presents the elaboration of Ba<sub>2</sub>LaFeNb<sub>4</sub>O<sub>15</sub> and Ba<sub>2</sub>EuFeNb<sub>4</sub>O<sub>15</sub> composite samples with an excess of hematite in the TTB nominal composition. The influence of crystal-chemistry on the phase content and properties of Ba<sub>2</sub>LnFeNb<sub>4</sub>O<sub>15</sub> TTB composites is discussed. A particular focus on the mechanisms related to the in-situ formation of barium ferrite is given. We show that we can control the spurious ferrite phase in TTB multiferroic composites and thus modulate their magnetic response.Read less <
Italian Keywords
Multiferroics
Tetragonal tungsten bronze
Composites
Origin
Hal imported