Symmetry, Structure, and Dynamics of Monoaxial Chiral Magnets

Togawa, Yoshihiko; Kousaka, Yusuke; Inoue, Katsuya; Kishine, Jun‐ichiro

doi:10.7566/jpsj.85.112001

Cited by 192 publications

(146 citation statements)

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“…Experimentally, the CMS has been confirmed by the Lorentz microscopy and small-angle electron diffraction in the monoaxial helimagnetic CrNb 3 S 6 [9,21]. The layered Cr-intercalated CrNb 3 S 6 exhibits a hexagonal structure belonging to the space-group P6 3 22 [22]. When a magnetic field is applied perpendicularly to the c-axis, a CMS lattice with the periodicity of L 0 =48nm appears below T C ∼127 K [22].…”

Section: Introductionmentioning

confidence: 74%

“…The layered Cr-intercalated CrNb 3 S 6 exhibits a hexagonal structure belonging to the space-group P6 3 22 [22]. When a magnetic field is applied perpendicularly to the c-axis, a CMS lattice with the periodicity of L 0 =48nm appears below T C ∼127 K [22]. However, other experiments also show the CMS can persist in a crossover region above T C [23,24].…”

Section: Introductionmentioning

confidence: 99%

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Critical phenomenon of the layered chiral helimagnetic YbNi₃Al₉

et al. 2020

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Two-dimensional layered YbNi 3 Al 9 exhibits a chiral helimagnetic ground state, which is a candidate for the field-modulated chiral magnetic soliton. In this work, the magnetism and critical phenomenon of YbNi 3 Al 9 are investigated. As H ⊥ c, a magnetic step with loop can be observed in the fielddependent magnetization, which may be corresponding to the possible chiral magnetic soliton phase transition. Based on the analysis of isothermal magnetization around T C , the critical exponents are obtained as β=0.1370(2), γ=1.7955(4), and δ=14.1043 (7), which fulfill the Widom scaling relation and Rushbrooke's law. Moreover, the obtained critical exponents are testified by the modified Arrott plot and scaling hypothesis. The critical exponents of YbNi 3 Al 9 are close to the theoretically prediction of 2D-Ising model with the spatial-dimensionality n=2 and spin-dimensionality d=1, indicating one-dimensional magnetic coupling in the two-dimensional framework. Based on universality scaling, we construct the detailed H-T phase diagram around the phase transition with H ⊥ c, which reveals that the field-induced magnetic transition for H ⊥ c is of the first-order type.

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Section: Introductionmentioning

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Critical phenomenon of the layered chiral helimagnetic YbNi₃Al₉

et al. 2020

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“…Interestingly, by substituting Cu for Ni, both T N and H c increases. At x = 0.06, a characteristic M(H) curve is observed, which is reminiscent of a chiral soliton lattice (CSL) state, a periodic array of incommensurate chiral spin twist formed in magnetic fields applied perpendicular to the helical axis in monoaxial chiral helimagnets [4,5]. CSL is a nonlinear order of topological spin structure originating from the crystal chirality through an antisymmetric interaction, the so-called Dzyaloshinskii-Moriya (DM) interaction.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Anisotropy of Chiral Magnet Yb(Ni₁₋_xCu_x)₃Al₉ at High Magnetic Fields

Ito¹,

Matsumura

Ohara³

2020

Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2019)

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We have measured the magnetization of rare-earth chiral magnets Yb(Ni 1−x Cu x ) 3 Al 9 for x=0 and 0.06 up to 14.5 T. Magnetization for the field direction H || c, which is the hard axis at low temperatures and low fields, overtakes the easy axis magnetization for H ⊥ c above ∼ 4 T. We analyzed this overtaking of the magnetization curves by considering a crystalline electric field model. It is shown that the B 66 term, which connects the |±5/2 and the |∓7/2 states through the off-diagonal matrix element, is responsible for the characteristic magnetization process in this compound. We also introduce orbital dependent exchange interactions to explain the temperature dependence of magnetic susceptibility.

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“…When the magnetic field is applied, this system is a good playground for study of the two pictures mentioned above. Magnetic properties under the field have two regimes at zero temperature depending on the field direction 12,[29][30][31] . The magnetic field perpendicular to the helical axis induces a chiral soliton lattice, where higher order harmonics are introduced: In the particle picture, each soliton can be regarded as the 2π-domain wall of Bloch type, and its periodic array results in the soliton lattice.…”

Section: Introductionmentioning

confidence: 99%

Chiral solitons in monoaxial chiral magnets in tilted magnetic field

et al. 2018

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We thoroughly study the zero temperature properties of a monoaxial chiral spin system under the tilted magnetic field. The magnetic phase diagram includes two kinds of continuous phase transition and one discontinuous phase transition. We clarify the properties of the phase transition in terms of the helical wave picture and the particle (soliton) picture, and also in terms of the interaction between solitons. The interacting-soliton picture well describes most of the discontinuous phase transition. In addition, we investigate several instabilities of the modulated structures such as an isolated soliton and the surface modulation, since their instabilities should be important to the observable changes of the magnetic properties. For this purpose, we perform the energy landscape analyses as well as the excitation spectral analyses; The former approach gives an intuitive interpretation. We clarify the mechanisms of the instabilities through these analyses, and draw the stability lines of solitons in the magnetic phase diagram.

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Symmetry, Structure, and Dynamics of Monoaxial Chiral Magnets

Cited by 192 publications

References 132 publications

Critical phenomenon of the layered chiral helimagnetic YbNi₃Al₉

Critical phenomenon of the layered chiral helimagnetic YbNi₃Al₉

Magnetic Anisotropy of Chiral Magnet Yb(Ni₁₋_xCu_x)₃Al₉ at High Magnetic Fields

Chiral solitons in monoaxial chiral magnets in tilted magnetic field

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Symmetry, Structure, and Dynamics of Monoaxial Chiral Magnets

Cited by 192 publications

References 132 publications

Critical phenomenon of the layered chiral helimagnetic YbNi3Al9

Critical phenomenon of the layered chiral helimagnetic YbNi3Al9

Magnetic Anisotropy of Chiral Magnet Yb(Ni1−xCux)3Al9 at High Magnetic Fields

Chiral solitons in monoaxial chiral magnets in tilted magnetic field

Contact Info

Product

Resources

About

Critical phenomenon of the layered chiral helimagnetic YbNi₃Al₉

Critical phenomenon of the layered chiral helimagnetic YbNi₃Al₉

Magnetic Anisotropy of Chiral Magnet Yb(Ni₁₋_xCu_x)₃Al₉ at High Magnetic Fields