Optical investigation of DyFeO3

Schuchert, H.; Hüfner, S.; Faulhaber, R.

doi:10.1007/bf01394703

Cited by 17 publications

(8 citation statements)

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“…1. The SR where the Fe 3+ spins reorient from a configuration of canted antiferromagnetism along the a axis with weak ferromagnetism along the c axis to a configuration of antiferromagnetism along the b axis with no effective moment vector below T SR1 suggests the transition configuration of type 4 → 1 , and similar behavior was also observed in DyFeO 3 [37,38] and ErCrO 3 [39]. In the high-temperature (HT) phase, the Fe 3+ anisotropy favors the 4 configuration (see the colored zone marked 4 in Fig.…”

Section: Methodssupporting

confidence: 60%

Twofold spin reorientation and field-induced incomplete phase transition in single-crystalDy0.5Pr0.5FeO3

Cao

Liu

et al. 2014

Phys. Rev. B

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We report an intriguing twofold spin reorientation transition of type 4 (G x ,A y ,F z ) → 1 (A x ,G y ,C z ) → 2 (F x ,C y ,G z ) for the Fe 3+ magnetic sublattice near spin reorientation temperatures T SR1 ß 77 K and T SR2 ß 45 K in a rare-earth orthoferrite Dy 0.5 Pr 0.5 FeO 3 single crystal. Magnetic-field-induced incomplete spin-configuration transitions ( 4 → 41 → 42 for H = 20 kOe and 4 → 42 for H = 40 kOe) were observed by measurement of magnetization as a function of temperature. The spin reorientation temperature of a Dy 0.5 Pr 0.5 FeO 3 single crystal can be controlled by changing the magnitude of the applied magnetic field. We also show that spin reorientation of the 1 → 4 type between T SR2 and T SR1 can be induced by an applied magnetic field along the c axis. The origin of the intriguing magnetic behavior is ascribed to the anisotropic effective field whose strength is determined by the interactions with R 3+ (R = Dy, Pr) spins and can be modified by the external applied magnetic field. It provides deeper insight into the Fe 3+ -R 3+ magnetic interaction which dominates the sophisticated magnetic phase transitions in the rare-earth orthoferrites.

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Section: Methodssupporting

confidence: 60%

Twofold spin reorientation and field-induced incomplete phase transition in single-crystalDy0.5Pr0.5FeO3

Cao

Liu

et al. 2014

Phys. Rev. B

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“…The crystal field splits multiplet 6 H 15/2 into doublets with the energies E 0 = 0, E 1 ≈ 52 cm −1 , E 2 ≈ 147 cm −1 , E 3 ≈ 225 cm −1 , etc. [21]. The ground Ising doublet with the energy E 0 = 0 is described by the wave function | ± 15/2 ; the first excited doublet with the energy E 1 ≈ 52 cm −1 is the Ising doublet described by the wave functions | ± 13/2 (Appendix C).…”

Section: Nonstationary Theory For Ultrashort Electromagnetic Pulsesmentioning

confidence: 99%

“…The irreducible representation for the antiferromagnetic mode C c is 1 . Equations (21) show that the electric field products E c E a are coupled with the C a and F b modes, while E 2 c and E 2 a excite the C c mode.…”

Section: Ultrashort Inverse Quantum Cotton-mouton Effectmentioning

confidence: 99%

“…The Néel temperature T N for spins of Fe 3+ ions is 600-700 K, while the Néel temperature T N of Dy 3+ ions is around 10 K. To exclude any interactions between magnetic moments of Fe 3+ and Dy 3+ , we also consider DyAlO 3 . The Dy 3+ ion in DyFeO 3 has a well-studied electronic structure and welldefined low-lying states [21][22][23]. The absorption spectrum of the Dy 3+ ion reveals excited electronic states very close to the photon energy of Ti-sapphire lasers with the central wavelength λ = 0.8 μm.…”

Section: Introductionmentioning

confidence: 97%

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Quantum theory of femtosecond optomagnetic effects for rare-earth ions in DyFeO3

et al. 2021

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Our theoretical analysis shows that a femtosecond laser pulse can efficiently launch magnetization dynamics of Dy 3+ ions in DyFeO 3 and DyAlO 3 . Excitation of electrons from the ground state to the low-lying electronic level of Dy 3+ ions by circularly or linearly polarized light can be seen as a result of an effective magnetic field acting on the magnetic moments of the rare-earth ions. It is shown that the launched magnetization dynamics can be expressed as a combination of coherent oscillations of mutually parallel and mutually antiparallel magnetic moments of Dy 3+ ions, respectively. While the antiparallel magnetic moments lie in the plane perpendicular to the wave vector of light in the medium k, the parallel magnetic moments are aligned along k. The magnetization dynamics depend strongly on the duration and the shape of the pumping laser pulse, as well as on the anisotropy in properties of the rare-earth ion.

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“…To calculate N(t), we take the pulse duration τ = 40 fs and T 1 = T 2 ≈ 3 ps that is inferred from the Dy absorption bands [39]. However, it should be noted that since τ T 1 , the THz emission calculated with the help of this model hardly depends on T 1 .…”

Section: Modeling Of the Photo-induced Magnetizationmentioning

confidence: 99%

Terahertz magnetization dynamics induced by femtosecond resonant pumping ofDy3+subsystem in the multisublattice antiferromagnetDyFeO3

Mikhaylovskiy¹,

Huisman²,

Popov

et al. 2015

Phys. Rev. B

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Resonant optical pumping of f − f electronic transitions in the Dy 3+ subsystem with femtosecond laser pulses in the multisublattice antiferromagnet DyFeO 3 produces a strongly pronounced effect on the induced magnetization dynamics. Analyzing the polarization and spectral properties of the emitted THz radiation, we infer that the resonant pumping magnetizes the partially ordered Dy 3+ ions on a femtosecond time scale with the induced longitudinal change of the magnetization reaching almost 1%. We also show that for laser photon energies close to the f − f resonance of Dy 3+ ions, a minimum in the efficiency of spin-wave excitation in the Fe 3+ subsystem via the inverse Faraday effect is observed. This observation reveals that the resonant photo-induced magnetization in the Dy 3+ subsystem and the off-resonant excitation of spin waves in the Fe 3+ subsystem are intrinsically competing processes.

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Optical investigation of DyFeO3

Cited by 17 publications

References 0 publications

Twofold spin reorientation and field-induced incomplete phase transition in single-crystalDy0.5Pr0.5FeO3

Twofold spin reorientation and field-induced incomplete phase transition in single-crystalDy0.5Pr0.5FeO3

Quantum theory of femtosecond optomagnetic effects for rare-earth ions in DyFeO3

Terahertz magnetization dynamics induced by femtosecond resonant pumping ofDy3+subsystem in the multisublattice antiferromagnetDyFeO3

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