Large Magnetoelectric Coupling Near Room Temperature in Synthetic Melanostibite Mn₂FeSbO₆

Abstract

Multiferroic materials exhibit two or more ferroic orders and have potential applications as multifunctional materials in the electronics industry. A coupling of ferroelectricity and ferromagnetism is hereby particularly promising. We show that the synthetic melanostibite mineral Mn FeSbO (R3‾ space group) with ilmenite-type structure exhibits cation off-centering that results in alternating modulated displacements, thus allowing antiferroelectricity to occur. Massive magnetoelectric coupling (MEC) and magnetocapacitance effect of up to 4000 % was detected at a record high temperature of 260 K. The multiferroic behavior is based on the imbalance of cationic displacements caused by a magnetostrictive mechanism, which sets up an unprecedented example to pave the way for the development of highly effective MEC devices operational at or near room temperature.

Studies of Structural, Dielectric and Electrical Characteristics of Complex Perovskite: Pb(Co1/3Mn1/3W1/3)O3

“…3(a)). Also, the height of the plot (ɛꞌvs T) decreases with increasing frequency and such typical behaviour is referedas a relaxor ferro-or antiferroelectric material [16]. One peak basically disappears with increasing frequency, which is the typical relaxor-ferroelectric behavior.…”

MnFe0.5Ru0.5O3: an above-room-temperature antiferromagnetic semiconductor

“…9) is similar to the collinear FiM structure reported for Mn 2 FeSbO 6 (IL-type, R% 3) at 150 K, in which Mn and Fe sublattices are coupled AFM in the ab plane. 57 The absence of FiM in corundum MnFe 0.5 Ru 0.5 O 3 is due to cation disorder and the absence of two AF-coupled sublattices. AFM interactions also exist in related NTO-type (R3) materials such as Ni 3 TeO 6 ,M n 2 FeWO 6 ,M n 2 FeMoO 6 and Mn 2 MnWO 6 , which show more complicated magnetic structures as a result of three ordered metal sites leading to competition between the different magnetic sublattices.…”

“…The 57 Fe Mössbauer studies were performed with a conventional constant acceleration drive in transmission mode, in conjunction with a 50 mCi 57 Co:Rh source. The absorber, MnFe 0.5 Ru 0.5 O 3 , was crushed to fine powder and put into a Perspex absorber holder.…”

Complex magnetism in Ni3TeO6-type Co3TeO6 and high-pressure polymorphs of Mn3−xCoxTeO6 solid solutions

“…1 High pressure Mn2BB'O6 double perovskites (DPvs) show a plethora of magnetic behaviours, with simple antiferromagnetic (AFM), [2][3][4][5] collinear, 6 perpendicular 7 and continuously rotating ferrimagnetic structures 8 and more complex incommensurate-elliptical helices. 9 The stacking of honeycomb / triangular magnetic sublattices in ordered-corundum structures such as Ni3TeO6-type (NTO), induces a strong magnetic frustration, usually resulting in the formation of incommensurate helical magnetic structures, 10 sometimes with thermal dependence and lock-in of their propagation vector 2 at low temperatures. 11 Ambient pressure M3TeO6 (M = Mn and Co) phases crystallise in distorted corundum-based structures, also showing complex magnetic behaviours.…”