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    From magnetic susceptibility, dielectric permittivity, electric polarization and specific heat measurements, we discover spin-induced ferroelectricity and magnetoelectric coupling in Mn3TeO6 and observe two successive magnetic transitions at low temperatures. A non-ferroelectric intermediate magnetic state occurs below 23 K and a multiferroic ground state emerges below 21 K. Moreover, Mn3TeO6 is a candidate for a multiferroic material where two types of incommensurate spin structures, cycloidal and helical, coexist. Theoretically, both spin substructures may contribute to the macro electric polarization via different mechanisms.
    Magnetoelectric effect
    Citations (19)
    We have investigated the structural, magnetic, and electric properties of ferromagnetic ${\mathrm{BiMnO}}_{3}$ with a highly distorted perovskite structure. At ${T}_{E}=750--770\mathrm{K},$ a centrosymmetric--to--non-centrosymmetric structural transition takes place, which describes of the ferroelectricity in the system. The changes in the dielectric constant were induced by the magnetic ordering ${(T}_{M}\ensuremath{\approx}100\mathrm{K})$ as well as by the application of magnetic fields near ${T}_{M}.$ These features are attributed to the inherent coupling between the ferroelectric and ferromagnetic orders in the multiferroic system.
    Citations (971)
    Abstract Exploring new magnetic materials is essential for finding advantageous functional properties such as magnetoresistance, magnetocaloric effect, spintronic functionality, and multiferroicity. Versatile classes of double perovskite compounds have been recently investigated because of intriguing physical properties arising from the proper combination of several magnetic ions. In this study, it is observed that the dominant ferrimagnetic phase is coexisted with a minor multiferroic phase in single-crystalline double-perovskite Er 2 CoMnO 6 . The majority portion of the ferrimagnetic order is activated by the long-range order of Er 3+ moments below T Er = 10 K in addition to the ferromagnetic order of Co 2+ and Mn 4+ moments arising at T C = 67 K, characterized by compensated magnetization at T Comp = 3.15 K. The inverted magnetic hysteresis loop observed below T Comp can be described by an extended Stoner–Wohlfarth model. The additional multiferroic phase is identified by the ferroelectric polarization of ~0.9 μC/m 2 at 2 K. The coexisting ferrimagnetic and multiferroic phases appear to be strongly correlated in that metamagnetic and ferroelectric transitions occur simultaneously. The results based on intricate magnetic correlations and phases in Er 2 CoMnO 6 enrich fundamental and applied research on magnetic materials through the scope of distinct magnetic characteristics in double perovskites.
    Ferrimagnetism
    Magnetism
    Citations (18)
    Double perovskite manganite Y2MnCrO6 ceramic is synthesized and its multiferroic properties are investigated.Novel multiferroic properties are displayed with respect to other multiferroics, such as high ferroelectric phase transition temperature, and the coexistence of ferrimagnetism and ferroelectricity. Moreover, the ferroelectric polarization of Y2MnCrO6 below the magnetic phase temperature can be effectively tuned by an external magnetic field, showing a remarkable magnetoelectric effect. These results open an effective avenue to explore magnetic multiferroics with spontaneous magnetization and ferroelectricity, as well as a high ferroelectric transition temperature.
    Ferrimagnetism
    Manganite
    Spontaneous magnetization
    Citations (1)
    We have demonstrated that spin-driven ferroelectricity in a tetragonal multiferroic Ba(2)CoGe(2)O(7) is controlled by applying uniaxial stress. We found that the application of compressive stress along the [110] direction leads to a 45° or 135° rotation of the sublattice magnetization of the staggered antiferromagnetic order in this system. This allows the spontaneous electric polarization to appear along the c axis. The present study suggests that an application of anisotropic stress, which is the simplest way to control symmetry of matter, can induce a variety of cross-correlated phenomena in spin-driven multiferroics.
    Tetragonal crystal system
    The magnetic and multiferroic properties of a B-site ordered double perovskite Sm2CoMnO6 are investigated. The electric polarization is observed below the ferromagnetic Curie temperature of 135 K. This electric polarization of Sm2CoMnO6 can be influenced by applying a magnetic field, showing an interesting magnetoelectric effect. The origins of multiferroic properties and magnetoelectric effect are discussed.
    Metamagnetism
    Magnetoelectric effect
    Curie
    Citations (39)
    We prepare polycrystalline CuCrO(2) and CuCr(0.98)Ni(0.02)O(2) samples by solid state reaction and investigate their multiferroicity. It is revealed that the Ni-doping can not only enhance slightly magnetization but also improve ferroelectricity. It is argued that the Ni(3+)-doping destabilizes the antiferromagnetic order of Cr(3+) ions and modulates the spin configuration, leading to the weak ferromagnetism and enhanced ferroelectric polarization. The coupling between the magnetic order and ferroelectric order is also characterized. (C) 2010 Elsevier B.V. All rights reserved.
    Citations (0)