Ferroelectricity in an Ising Chain Magnet

Choi, Young Jai; Yi, Hyunjung; Lee, S.; Huang, Q.; Kiryukhin, V.; Cheong, Sang‐Wook

doi:10.1103/physrevlett.100.047601

Cited by 456 publications

(441 citation statements)

References 27 publications

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“…Polarization may appear in collinear magnets as long as the magnetic order involves different magnetic atoms between which the exchange coupling varies. This is the case, for example, for Ca 3 CoMnO 6 , which consists of one-dimensional chains of Co and Mn [65]. The magnetic order distorts the bonds, thus breaking the space inversion symmetry and allowing for polarization to develop.…”

Section: Ii) Joint-order Multi-ferroics (Type Ii)mentioning

confidence: 99%

Multi-ferroic and magnetoelectric materials and interfaces

Velev

Jaswal

Tsymbal

2011

Phil. Trans. R. Soc. A.

208

144

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The existence of multiple ferroic orders in the same material and the coupling between them have been known for decades. However, these phenomena have mostly remained the theoretical domain owing to the fact that in single-phase materials such couplings are rare and weak. This situation has changed dramatically recently for at least two reasons: first, advances in materials fabrication have made it possible to manufacture these materials in structures of lower dimensionality, such as thin films or wires, or in compound structures such as laminates and epitaxial-layered heterostructures. In these designed materials, new degrees of freedom are accessible in which the coupling between ferroic orders can be greatly enhanced. Second, the miniaturization trend in conventional electronics is approaching the limits beyond which the reduction of the electronic element is becoming more and more difficult. One way to continue the current trends in computer power and storage increase, without further size reduction, is to use multi-functional materials that would enable new device capabilities. Here, we review the field of multi-ferroic (MF) and magnetoelectric (ME) materials, putting the emphasis on electronic effects at ME interfaces and MF tunnel junctions.

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Section: Ii) Joint-order Multi-ferroics (Type Ii)mentioning

confidence: 99%

Multi-ferroic and magnetoelectric materials and interfaces

Velev

Jaswal

Tsymbal

2011

Phil. Trans. R. Soc. A.

208

144

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“…The recent discovery of magnetic control of the electric polarization in manganite 2 has attracted significant attention in pure and applied science. The following large number of studies revealed three major microscopic scenarios to induce the electric polarization by the spin system 3 : spin current [4][5][6] , exchange striction 7,8 and spin-dependent p-d hybridization mechanisms [9][10][11] .…”

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confidence: 99%

Magnetic control of transverse electric polarization in BiFeO3

et al. 2015

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Numerous attempts have been made to realize crossed coupling between ferroelectricity and magnetism in multiferroic materials at room temperature. BiFeO 3 is the most extensively studied multiferroic material that shows multiferroicity at temperatures significantly above room temperature. Here we present high-field experiments on high-quality mono-domain BiFeO 3 crystals reveal substantial electric polarization orthogonal to the widely recognized one along the trigonal c axis. This novel polarization appears to couple with the domains of the cycloidal spin order and, hence, can be controlled using magnetic fields. The transverse polarization shows the non-volatile memory effect at least up to 300 K.

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“…A variety of such mechanisms have been proposed [6]: magneto-striction is the only allowed mechanism for acentric collinear structures, and is active in the Ising system Ca 3 (Co,Mn) 2 O 6 [7] and, most likely, in the commensurate phase of YMn 2 O 5 [8]. Most other "type-II" multiferroics are cycloidal magnets, where non-collinear spins are key ingredients in the context of the so-called spincurrent model [9,10].…”

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confidence: 99%

Multiferroicity and spiral magnetism inFeVO4with quenched Fe orbital moments

et al. 2009

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FeVO4 has been studied by heat capacity, magnetic susceptibility, electric polarization and single crystal neutron diffraction experiments. The triclinic crystal structure is made of S -shaped clusters of six Fe 3+ ions, linked by VO 3− 4 groups. Two long-range magnetic ordering transitions occur at TN1=22K and TN2=15K. Both magnetic structures are incommensurate. That stable below TN1 is collinear with amplitude modulated moments whereas below TN2 the arrangement is non-collinear with a helicoidal modulation. Below TN2, FeVO4 becomes weakly ferroelectric coincidentally with the loss of the collinearity of the magnetic structure. We conclude that FeVO4 provides another example of frustrated spiral magnet similar to the classical TbMnO3 compound. However, FeVO4 has quenched orbital moments and a particular structure clarifying the respective role of anisotropy and magnetic frustration in this type of multiferroic materials.PACS numbers: 25.40. Dn, 75.25.+z, There has been a recent surge of interest in a novel class of multiferroic materials [1], in which ferroelectricity arises below a magnetic phase transition and as a direct consequence of complex magnetic ordering in systems with strong magneto-electric interactions [2]. This phenomenon, which requires lowering of the magnetocrystalline symmetry to a polar group, can only appear in complex magnetic structures, typically stabilized by magnetic frustration or strong exchange competition, as in Ni 3 V 2 O 8 [3] and TbMnO 3 [4]. By contrast, these "novel" or "type II" multiferroics are simple binary [5] or ternary oxides -a desirable feature for prospective applications.In addition to fulfilling strict magneto-structural symmetry requirements, type-II multiferroics must possess a microscopic mechanism to generate electric dipole moments. A variety of such mechanisms have been proposed [6]: magneto-striction is the only allowed mechanism for acentric collinear structures, and is active in the Ising system Ca 3 (Co,Mn) 2 O 6 [7] and, most likely, in the commensurate phase of YMn 2 O 5 [8]. Most other "type-II" multiferroics are cycloidal magnets, where non-collinear spins are key ingredients in the context of the so-called spincurrent model [9,10]. For this, a crucial role is played by relativistic spin-orbit interaction, which can take place at the ligand ionic site, as for pure e g systems, within the transition-metal t 2g orbitals or between t 2g and e g orbitals [6]. A particularly interesting case of the latter is provided by high-spin d 5 systems (S=5/2) where L=0 in the free ion and the orbital angular momentum is supposedly absent. As for the acentric magnetic structure itself, this typically comes about when a connected network of superexchange (SE) interactions is destabilized by the presence of either strong next-nearest neighbor interactions or geometrical frustration [1,11].In this letter, we describe a new multiferroic compound -FeVO 4 -in which the magnetic ion is orbitally quenched Fe 3+ (d 5 , L=0, S=5/2). The magnetic and dielectric phase diagram o...

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Ferroelectricity in an Ising Chain Magnet

Cited by 456 publications

References 27 publications

Multi-ferroic and magnetoelectric materials and interfaces

Multi-ferroic and magnetoelectric materials and interfaces

Magnetic control of transverse electric polarization in BiFeO3

Multiferroicity and spiral magnetism inFeVO4with quenched Fe orbital moments

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