Magnetically Induced Polarization in Centrosymmetric Bonds

Solovyev, I. V.; Ono, Ryota; Nikolaev, S. A.

doi:10.1103/physrevlett.127.187601

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Phys. Rev. Lett.

2021

DOI: 10.1103/physrevlett.127.187601

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Magnetically Induced Polarization in Centrosymmetric Bonds

I. V. Solovyev

Ryota Ono

S. A. Nikolaev

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2024

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Cited by 5 publications

(3 citation statements)

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“…where the first term describes isotropic exchange striction, while the following terms originate form the antisymmetric and the (traceless) symmetric anisotropy [29][30][31] . This model is derived in the framework of the modern theory of polarization in solids [22][23][24] , using perturbation expansion of the Wannier functions.…”

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confidence: 99%

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Multiferroic kinks and spin-flop transition in Ni2InSbO6 from first principles

Ono,

Solovyev,

Artyukhin

2024

npj Spintronics

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Magnetoelectric multiferroics are key materials for next-generation spintronic devices due to their entangled magnetic and ferroelectric properties. Spiral multiferroics possess ferroelectric polarization and are particularly promising for electric control of magnetism and magnetic control of ferroelectricity. In this work, we uncover long-period incommensurate states characterized by unique multiferroic kinks in corundum nickelate Ni2InSbO6, a member of a promising family of polar magnets. Utilizing a 2-orbital S = 1 model, we derive formulas for Heisenberg and anisotropic magnetic exchanges and magnetically-induced polarization, enabling their calculations from first principles. We use these parameters in Monte Carlo and Landau theory-based calculations to reproduce experimentally observed magnetic structures and polarization dependence on the magnetic field. We predict magnetic phase transitions between flat spiral, conical spiral, canted antiferromagnetic and ferromagnetic states under increasing magnetic fields. Kinks in the spiral phases repel each other through a Yukawa-like potential arising from exchange of massive magnons. We also find that suitably directed electric fields can be used to stabilize the ferromagnetic and spiral states. The findings open a new pathway to predictive first-principles modelling of multiferroics and will inspire experiments and technological applications based on multiferroic kinks.

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confidence: 99%

“…We derive analytical formulas for the symmetric and antisymmetric exchange constants in (2) and magnetically-induced electronic component of the polarization in (3) from the 2-orbital model following the strategy used in refs. 30,31 (see "Methods" for the derivation). For exchange interactions we have:…”

mentioning

confidence: 99%

Multiferroic kinks and spin-flop transition in Ni2InSbO6 from first principles

Ono,

Solovyev,

Artyukhin

2024

npj Spintronics

Self Cite

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“…The present theoretical approach has been successfully applied to other multiferroic systems. [43][44][45][46][47] More details of the calculation procedure are described in Supplemental Material. [34] As illustrated in Figs.…”

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confidence: 99%

Room-Temperature Type-II Multiferroic Phase Induced by Pressure in Cupric Oxide

et al. 2022

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According to previous theoretical work, the binary oxide CuO can become a room temperature multiferroic via tuning of the superexchange interactions by application of pressure. Thus far, however, there has been no experimental evidence for the predicted room-temperature multiferroicity.Here, we show by neutron diffraction that the multiferroic phase in CuO reaches 295 K with the application of 18.5 GPa pressure. We also develop a spin Hamiltonian based on density functional theory and employing superexchange theory for the magnetic interactions, which can reproduce the experimental results. The present study provides a stimulus to develop room-temperature multiferroic materials by alternative methods based on existing low temperature compounds, such as epitaxial strain, for tunable multifunctional devices and memory applications.

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Electric polarization evolution equation for antiferromagnetic multiferroics with the polarization proportional to the scalar product of the spins

Andreev,

Trukhanova

2024

Phys. Scr.

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The spin current model of electric polarization in multiferroics is justifiedvia the quantum hydrodynamic method and the mean-field part of the spin-orbit interaction.The spin current model is applied to derive the electric polarization proportional to the scalar product of the spins of the nearby ions,which appears to be caused by the Dzylaoshinskii-Moriya interaction.The symmetric tensor spin structure of the polarization is discussed as well.We start our derivations for the ferromagnetic multiferroic materialsand present further generalizations for the antiferromagnetic multiferroic materials.We rederive the operator of the electric dipole moment,which provides the macroscopic polarization obtained via the spin current model.Finally, we use the quantum average of the found electric dipole moment operator to derivethe polarization evolution equation for the antiferromagnetic multiferroic materials.The possibility of spiral spin structures is analyzed.

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Magnetically Induced Polarization in Centrosymmetric Bonds

Cited by 5 publications

References 53 publications

Multiferroic kinks and spin-flop transition in Ni2InSbO6 from first principles

Multiferroic kinks and spin-flop transition in Ni2InSbO6 from first principles

Room-Temperature Type-II Multiferroic Phase Induced by Pressure in Cupric Oxide

Electric polarization evolution equation for antiferromagnetic multiferroics with the polarization proportional to the scalar product of the spins

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