Multiferroicity and magnetoelastic coupling in α−Mn2O3 : A binary perovskite

Abstract

Multiferroics where at least two primary ferroic orders are present and coupled in a single system constitute an important class of materials. They attracted special consideration as they present both intriguing fundamental physics problems and technological importance for potential multifunctional devices. Here, we present the evidence of multiferroicity and magnetoelectric (ME) coupling in -Mn2O3; a unique binary perovskite. Corresponding to the antiferromagnetic (AFM) ordering around 80K, a clear frequency independent transition is observed in the dielectric permittivity. We showed that electric polarization emerges near AFM regime that can be modulated with magnetic field. The detailed structural analysis using synchrotron radiation X-ray diffraction demonstrates the increase in structural distortion with decreasing temperature, as well as changes in the unit cell parameters and bond lengths across the ferroelectric and magnetic ordering temperatures. This observation of multiferroicity and magnetoelastic coupling in -Mn2O3 provides insights for the exploration of ME coupling in related materials.

Molecular quantum materials: electronic phases and charge dynamics in two-dimensional organic solids

“…The materials with magneto-electric coupling, in which ferroelectricity and magnetism coexist, commonly known as multiferroics, open prospects of charge control by applied magnetic fields (and vice versa). In the 21 st century the flury of activity in the subject of multiferroicity is considerably rising worldwide due to both the intriguing fundamental physics problems and the technological importance in designing new generation of spintronics devices [105][106][107][108]. There exist several extensive review articles on multiferroicity, e.g.…”

Structural Stability and Properties of Marokite-Type γ-Mn3O4

“…Synthetic manganese oxides and manganese oxide minerals play an important role in different technological processes and applications. , For example, some of them are utilized as effective catalysts, − as supercapacitors, as ferroelectrics or multiferroics, − as elements in ion batteries, − as semiconductors, and for many other purposes. − In general, manganese oxides, including Mn-based perovskites, − are inexpensive and highly functional materials, which combine interesting electronic and magnetic properties and, therefore, have remained in the focus of recent investigations.…”

Switchable and Nonswitchable Polarization in Doubly Ordered Perovskites NaLnCoWO6 (Ln = Er, Tm, Yb, and Lu)

“…This behavior is similar to that of other pyroelectric compounds, NaYMnWO 6 and NaHoCoWO 6 . The magnetic structure of NaHoCoWO 6 and NaYCoWO 6 is collinear with a k -vector of ( 1 / 2 , 0, 1 / 2 ), and NaYMnWO 6 has a helical structure with a k -vector of (0, 0.427, 1 / 2 ). , These magnetic structures infer that the change in polarization in doubly ordered perovskites could be due to magnetoelastic coupling. − The observed change in polarization is magnetically enhanced since the structure of these materials is already polar in the paramagnetic state. Also, the nonswitchable polarization below magnetic ordering temperature reveals that the polarization contribution from magnetic ordering could be in the same direction as that of the paramagnetic state.…”