Terahertz absorption spectroscopy study of spin waves in orthoferrite 
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 in a magnetic field

Amelin, Kirill; Nagel, U.; Fishman, Randy; Yoshida, Yoshiyuki; Sim, Hasung; Park, Kisoo; Park, Je‐Geun; Rõõm, T.

doi:10.1103/physrevb.98.174417

Cited by 16 publications

(24 citation statements)

References 19 publications

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“…that yields |d(θ)| ∼ = 3.2 K = 0.28 meV in YFeO 3 given H D = 140 kOe [17]. This value is in good agreement with the data of recent experiments [52,53] which make it possible to obtain information on the Dzyaloshinskii vectors based on measurements of the spin-wave spectrum. It is worth noting that despite F z ≈ 0.01 the d(θ) parameter is only one order of magnitude smaller than the exchange integral in YFeO 3 .…”

Section: Overt and Hidden Canting In Orthoferritessupporting

confidence: 89%

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Dzyaloshinskii Interaction and Exchange-Relativistic Effects in Orthoferrites

Moskvin

2021

J. Exp. Theor. Phys.

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We present an overview of the microscopic theory of the Dzyaloshinskii-Moriya (DM) coupling and related exchange-relativistic effects such as exchange anisotropy, electron-nuclear antisymmetric supertransferred hyperfine interactions, antisymmetric magnetogyrotropic effects, and antisymmetric magnetoelectric coupling in strongly correlated 3d compounds focusing on orthoferrites RFeO3 (R is a rare-earth ion or yttrium Y). Most attention in the paper centers around the derivation of the Dzyaloshinskii vector, its value, orientation, and sense (sign) under different types of the (super)exchange interaction and crystal field. Microscopically derived expression for the dependence of the Dzyaloshinskii vector on the superexchange geometry allows one to find all the overt and hidden canting angles in orthoferrites RFeO3 as well as corresponding contribution to magnetic anisotropy. Being based on the theoretical predictions regarding the sign of the Dzyaloshinskii vector we have predicted and study in detail a novel magnetic phenomenon, weak ferrimagnetism in mixed weak ferromagnets with competing signs of the Dzyaloshinskii vectors. The ligand NMR measurements in weak ferromagnets are shown to be an effective tool to inspect the effects of DM coupling in an external magnetic field. Along with orthoferrites RFeO3 and weak ferrimagnets RFe1−xCrxO3, although to a lesser extent, we address such typical weak ferromagnets as α-Fe2O3, FeBO3, and FeF3.

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Section: Overt and Hidden Canting In Orthoferritessupporting

confidence: 89%

“…however, this relation yields the exchange integrals (J = 36.8 K in YFeO 3 ) that can be one and a half or even twice less than the values obtained by other methods [11,50,51]. Most recent precise experimental data yield for YFeO 3 J c = 58.2 K, J ab = 53.6 K [52] or J c = J ab = 51.5 K [53].…”

Section: жэтфmentioning

confidence: 90%

Dzyaloshinskii Interaction and Exchange-Relativistic Effects in Orthoferrites

Moskvin

2021

J. Exp. Theor. Phys.

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“…Spin canting typically arises when the Dzyaloshinskii-Moriya (DM) interaction is allowed by symmetry (e.g. in orthoferrite YFeO 3 DM exchange induces a ∼0.3 • canting of Fe spins [27], which is small due to the DM interaction being approximately thirty times weaker than Heisenberg exchange [28]). By comparison, Mn3 spins in R 2 CuMnMn 4 O 12 exhibit canting angles of up to ∼30 • (Fig.…”

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confidence: 99%

Spontaneous Rotation of Ferrimagnetism Driven by Antiferromagnetic Spin Canting

et al. 2020

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Spin-reorientation phase transitions that involve the rotation of a crystal's magnetisation have been well characterised in distorted perovskite oxides such as the orthoferrites. In these systems spin reorientation occurs due to competing rare earth and transition metal anisotropies coupled via f − d exchange. Here, we demonstrate an alternative paradigm for spin reorientation in distorted perovskites. We show that the R2CuMnMn4O12 (R = Y or Dy) triple A-site columnar ordered quadruple perovskites have three ordered magnetic phases and up to two spin reorientation phase transitions. Unlike the spin reorientation phenomena in other distorted perovskites, these transitions are independent of rare earth magnetism, but are instead driven by an instability towards antiferromagnetic spin canting likely originating in frustrated Heisenberg exchange interactions, and the competition between Dzyaloshinskii-Moriya and single-ion anisotropies.

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“…It is worth noting that another labeling of the Fe 3+ positions, different to that used here, is found in the literature (see, for example, Refs. [8,9]), in which case the basis vectors G, C, A may differ in sign.…”

Section: Crystal and Magnetic Structure Of Rare-earth Orthoferritesmentioning

confidence: 99%

Structure–Property Relationships for Weak Ferromagnetic Perovskites

Moskvin

2021

Magnetochemistry

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Despite several decades of active experimental and theoretical studies of rare-earth orthoferrites, the mechanism of the formation of their specific magnetic, magnetoelastic, optical, and magneto-optical properties remains a subject of discussion. This paper provides an overview of simple theoretical model approaches to quantitatively describing the structure–property relationships—in particular, the interplay between FeO6 octahedral deformations/rotations and the main magnetic and optic characteristics, such as Néel temperature, overt and hidden canting of magnetic sublattices, magnetic and magnetoelastic anisotropy, and optic and photoelastic anisotropy.

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Terahertz absorption spectroscopy study of spin waves in orthoferrite YFeO3 in a magnetic field

Cited by 16 publications

References 19 publications

Dzyaloshinskii Interaction and Exchange-Relativistic Effects in Orthoferrites

Dzyaloshinskii Interaction and Exchange-Relativistic Effects in Orthoferrites

Spontaneous Rotation of Ferrimagnetism Driven by Antiferromagnetic Spin Canting

Structure–Property Relationships for Weak Ferromagnetic Perovskites

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