Two-Step Antiferromagnetic Transitions and Ferroelectricity in Spin-1 Triangular-Lattice Antiferromagnetic Sr3NiTa2O9

Liu, Meifeng; Zhang, Huimin; Huang, Xin; Ma, Chunyang; Dong, Shuai; Liu, Junming

doi:10.1021/acs.inorgchem.5b02270

Cited by 17 publications

(12 citation statements)

References 56 publications

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“…For Heisenberg spins, a typical Y-type ground state usually appears with nearest-neighbor spins arranged with 120 • in the two-dimensional (2D) triangular lattice (see Fig. 1(b)), for example in Sr 3 NiTa 2 O 9 [17], Ba 3 MnNb 2 O 9 [18], ACrO 2 [19], RbFe(MoO 4 ) 2 [20,21], and hexagonal RMnO 3 [22]. Interestingly, such Y-type magnetism, with noncollinear spin pairs, can lead to multiferroicity in some compounds [16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

“…1(b)), for example in Sr 3 NiTa 2 O 9 [17], Ba 3 MnNb 2 O 9 [18], ACrO 2 [19], RbFe(MoO 4 ) 2 [20,21], and hexagonal RMnO 3 [22]. Interestingly, such Y-type magnetism, with noncollinear spin pairs, can lead to multiferroicity in some compounds [16][17][18][19][20][21]. While in the Ising-spin limit, spins arranged in 2D triangular lattice can also form some exotic patterns [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

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Exchange striction driven magnetodielectric effect and potential photovoltaic effect in polar CaOFeS

Zhang

Lin

Zhang

et al. 2017

Phys. Rev. Materials

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CaOFeS is a semiconducting oxysulfide with polar layered triangular structure. Here a comprehensive theoretical study has been performed to reveal its physical properties, including magnetism, electronic structure, phase transition, magnetodielectric effect, as well as optical absorption. Our calculations confirm the Ising-like G-type antiferromagnetic ground state driven by the next-nearest neighbor exchanges, which breaks the trigonal symmetry and is responsible for the magnetodielectric effect driven by exchange striction. In addition, a large coefficient of visible light absorption is predicted, which leads to promising photovoltaic effect with the maximum light-to-electricity energy conversion efficiency up to 24.2%.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Exchange striction driven magnetodielectric effect and potential photovoltaic effect in polar CaOFeS

Zhang

Lin

Zhang

et al. 2017

Phys. Rev. Materials

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“…Fitting the (T) data from 100-300 K with linear Curie-Weiss law, we obtained -28 K for the Curie-Weiss temperature (θCW) suggesting the dominance antiferromagnetic (AFM) exchange interactions. For Ca3NiNb2O9, S = 1, the effective moment (𝜇 eff ) was calculated as 3.16 μB/Ni with a corresponding Landé g factor of 2.23, based on 𝜇 eff = 𝑔√𝑆(𝑆 + 1)𝜇 B , which was comparable with those of Ba3NiNb2O9, Sr3NiNb2O9 and other compounds with Ni 2+ ions [9,10,21,28,29].…”

Section: A Neutron Powder Diffractionmentioning

confidence: 71%

Lattice distortion effects on the frustrated spin-1 triangular-antiferromagnet A3NiNb2O9 ( A=
Lu
¹
,
Ge
²
,
Wang
³

et al. 2018
Phys. Rev. B
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0
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In the geometrically frustrated materials with the low-dimensional and small spin moment, the quantum fluctuation could interfere with the complicated interplay of the spin, electron, lattice and orbital interactions, and host exotic ground states such as nematic spin-state and chiral liquid phase. While the quantum phases of the one-dimensional chain and S -½ twodimensional triangular-lattice antiferromagnet (TLAF) had been more thoroughly investigated by both theorists and experimentalists, the work on S = 1 TLAF has been limited. We induced the lattice distortion into the TLAFs, A3NiNb2O9 (A = Ba, Sr, and Ca) with S (Ni 2+ ) = 1, and applied the thermodynamic, magnetic and neutron scattering measurements. Although A3NiNb2O9 kept the non-collinear 120° antiferromagnetic phase as the ground state, the Ni 2+ -lattice changed from the equilateral triangle (A = Ba) into isosceles triangle (A = Sr and Ca). The inelastic neutron scattering data were simulated by the linear spin-wave theory, and the competition between the single-ion anisotropy and the exchange anisotropy from the distorted lattice was discussed. I. INTRODUCTIONIn the geometrically frustrated system, the complicated interaction(s) between electron, phonon, spin and orbital could lead to degenerate ground states, which introduce exotic properties and attracted a lot attention over the past decades [1][2][3]. Meanwhile, those degenerate states would easily be held by the symmetrical inconsistency and be destroyed by significant quantum fluctuations, not only induced by the complicated interactions among low dimensionality, geometrical frustration, small spin and the applied magnetic field, but also modified the classical Heisenberg model [4][5]. The triangular-lattice antiferromagnet (TLAF), one of the simplest frustrated two-dimensional (2D) material, had been suggested to be strongly influenced by the strong quantum spin fluctuations with small effective spin (S = 1/2 or 1) and exhibited a rich variety of interesting physics [6][7][8].A striking example of these quantum phenomena is the transition from a non-collinear 120° spin configuration at 0 T into fractional-magnet lattice under a finite range of applied magnetic field, such as a collinear up-up-down (uud) phase corresponding to a magnetization plateau with one-third of its saturation value [9][10][11][12][13].Recently, the theoretical research indicated the uud state as a commensurate analogue of the incommensurate spin-density-wave which was predicted and observed for frustrated one-dimensional spin-1 chains and S = ½ TLAF [14, 15], and suggested the possibility for exotic magnetic excitations. While there was an enormous theoretical activity in the domain, a full consensus on the origin of the uud state, (even the ground magnetic state, non-collinear 120 o at zero field) was limited. This is true as well for the state-of-the art experimental investigation of its spin excitations due to the lack of a triangular-lattice materials. Although the lattice distortion has been believed to influence t...

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“…The first example are some type-II multiferroics with layered triangular lattices. Two dimensional triangular lattices are typically geometrically frustrated lattices for antiferromagnets, such as CuFeO2, Ba3NiNb2O9, and a number of isostructures [81][82][83][84].…”

Section: Other Magnetoelectric Mechanisms In Multiferroicsmentioning

confidence: 99%

“…Usually the 120 o non-collinear spin order (Y-type antiferromagnetism) is stabilized by the nearest-neighbor antiferromagnetic exchanges, if the second nearest-neighbor exchange and the magnetocrystalline anisotropy are weak [85]. Such non-collinear spin texture can induce a tiny polarization perpendicular to the spin plane [81][82][83][84]. The microscopic driving force is the spin-orbit coupling but not the Dzyaloshinskii-Moriya interaction.…”

Section: Other Magnetoelectric Mechanisms In Multiferroicsmentioning

confidence: 99%

Magnetoelectricity in multiferroics: a theoretical perspective

Dong

Xiang

Dagotto

2019

National Science Review

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165

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The key physical property of multiferroic materials is the existence of a coupling between magnetism and polarization, i.e. magnetoelectricity. The origin and manifestations of magnetoelectricity can be very different in the available plethora of multiferroic systems, with multiple possible mechanisms hidden behind the phenomena. In this Review, we describe the fundamental physics that causes magnetoelectricity from a theoretical viewpoint.The present review will focus on the main stream physical mechanisms in both single phase multiferroics and magnetoelectric heterostructures. The most recent tendencies addressing possible new magnetoelectric mechanisms will also be briefly outlined.Magnetism and electricity are two fundamental physical phenomena which have been widely covered in elementary textbooks of electromagnetism and have led to a broad technological revolution within human civilization. Even today, these two crucial subjects remain at the frontier of active research, and are still attracting considerable attention within the scientific community for their indispensable scientific value and possible applications. In solids, magnetism and electricity originate from the spin and the charge degrees of freedom, respectively. The crossover between these two fascinating topics has much grown in recent years and it has developed into an emergent branch of Condensed Matter Physics calledGenerally speaking, magnetoelectric effects can exist in many systems, even in some that are nonmagnetic. In fact, the first example of a magnetoelectric effect was observed by Röntgen in 1888 in a dielectric material, which was magnetized when moving through an electric field [10]. Much more recently, the surface state of topological insulators was predicted to manifest magnetoelectric effects [11]. However, to develop magnetoelectricity of a large magnitude, and as a consequence of more considerable practical value, multiferroics seem to be the best playground. In multiferroics, both magnetic moments and electric dipole moments can be ordered, inducing robust macroscopic quantities such as magnetization and polarization. Moreover, crucially for applications, both moments are coupled. Then, these macroscopic quantities may be mutually controlled, for example modifying the magnetization by an electric voltage or modifying the polarization by a magnetic field, which is particularly useful to design new devices, such as for storage and sensors.However, conceptually the mere existence of multiferroics is highly non trivial [12]. For most magnetic materials, the magnetic moments arise from unpaired electrons in partially occupied d orbitals and/or f orbitals. However, the spontaneous formation of a charge dipole usually needs empty d orbitals as a condition of having a coordinate bond, i.e. the so-called d 0 rule. Thus, the key ions involved in typical magnetic materials and those in polar materials are different, making these two areas of research nearly isolated from each other. However, in 2003 the discovery of a large polarizatio...

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Two-Step Antiferromagnetic Transitions and Ferroelectricity in Spin-1 Triangular-Lattice Antiferromagnetic Sr₃NiTa₂O₉

Cited by 17 publications

References 56 publications

Exchange striction driven magnetodielectric effect and potential photovoltaic effect in polar CaOFeS

Exchange striction driven magnetodielectric effect and potential photovoltaic effect in polar CaOFeS

Lattice distortion effects on the frustrated spin-1 triangular-antiferromagnet A3NiNb2O9 ( A=
Lu
¹
,
Ge
²
,
Wang
³

et al. 2018
Phys. Rev. B
28
0
25
0
View full text Add to dashboard Cite

Magnetoelectricity in multiferroics: a theoretical perspective

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Two-Step Antiferromagnetic Transitions and Ferroelectricity in Spin-1 Triangular-Lattice Antiferromagnetic Sr3NiTa2O9

Cited by 17 publications

References 56 publications

Exchange striction driven magnetodielectric effect and potential photovoltaic effect in polar CaOFeS

Exchange striction driven magnetodielectric effect and potential photovoltaic effect in polar CaOFeS

Lattice distortion effects on the frustrated spin-1 triangular-antiferromagnet A3NiNb2O9 ( A=Lu1, Ge2, Wang3 et al. 2018Phys. Rev. B280250View full textAdd to dashboardCite

Magnetoelectricity in multiferroics: a theoretical perspective

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Two-Step Antiferromagnetic Transitions and Ferroelectricity in Spin-1 Triangular-Lattice Antiferromagnetic Sr₃NiTa₂O₉

Lattice distortion effects on the frustrated spin-1 triangular-antiferromagnet A3NiNb2O9 ( A=
Lu
¹
,
Ge
²
,
Wang
³

et al. 2018
Phys. Rev. B
28
0
25
0
View full text Add to dashboard Cite