New rhenium containing seignettomagnets and ferroelectrics

Abstract

Complex investigations are made (neutron diffraction study, high temperature X‐ray analysis, dielectric measurements at low and superhigh frequency ranges, resonance (ESR and Mössbauer effect) and magnetic measurements) on the known compounds A2BReO6 (A = Ba, Sr; B = Li, Mg, Ca, Mn, Fe, Co, Ni) and under high pressure synthesized compounds Pb2BReO6 (B = Mg, Fe, Co, Ni) with the perovskite‐type structure. The total sum of the results shows the presence of a spontaneously polarized state in the investigated compounds. Seven new seignettomagnets are found.

Perovskite and Pyrochlore Modifications of Pb2MnReO6: Synthesis, Structure, and Electronic Properties

“…7 In an attempt to probe further the influence of the A site cation on the structure and properties of these materials, we have investigated the A ) Pb members of A 2 MReO 6 . Formation of perovskite-type Pb 2 MReO 6 for M ) Mg, Mn, Fe, Co, and Ni has been known, 8 but no detailed study of structure and properties has been reported. We have chosen lead as the A-site cation because Pb 2+ with its 6s 2 lone pair is known to influence the structure and properties of AMO 3 oxides.…”

High-pressure synthesis, structural and complex magnetic properties of the ordered double perovskite Pb2NiReO6

“…Taking into account these considerations, we have revisited the structure, microstructure and magnetic properties of the Pb 2 NiReO 6 member. 20 In light of our results we have been able to determine the crystal structure and a complex microstructure. We have also established a much more elaborate magnetic behavior which operates on the lead nickel rhenate Pb 2 NiReO 6 perovskite.…”

“…It was published elsewhere the synthesis of a complete series of Pb 2 MReO 6 perovskites (M= Ni +3 , Fe +3 , Mn +3 , etc.) [20][21][22] . It was reported that these compounds crystallize in the Fm3m cubic space group with parameter 2a p (where a p ∼ 4Å is the lattice constant of the ABO 3 cubic perovskite).…”

“…To the best of our knowledge, there does not seem to be further studies concerning some other Pb 2 MReO 6 members. Taking into account these considerations, we have revisited the structure, microstructure and magnetic properties of the Pb 2 NiReO 6 member 20 . In light of our results we have been able to determine the crystal structure and a complex microstructure.…”

“…has been published elsewhere. [20][21][22] It has been reported that these compounds crystallize in the Fm3 ˉm cubic space group with the parameter 2a p (where a p ∼ 4 Å is the lattice constant of the ABO 3 cubic perovskite). Concerning the magnetic properties of these compounds, it was assumed that several members of the Pb 2 MReO 6 series (M = Fe and Ni) are ferrimagnetic, while Pb 2 CoReO 6 shows antiferromagnetic properties.…”