Investigation of iron borate on the submillimeter waves

Polupanov, V. N.; Dakhov, N. F.; Kiselyev, V. K.; Seleznev, V. N.

doi:10.1007/bf02068285

Cited by 4 publications

(5 citation statements)

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“…The absolute values of the frequencies and the field dependencies are in very good agreement with the two modes of antiferromagnetic resonance in this compound [26,43,44]. Figure 2(d) shows how the Fourier amplitudes of the modes depend on the strength of the THz electric field.…”

supporting

confidence: 67%

“…If the THz pulse triggers spin dynamics, it can be translated in the dynamics of the magnetization. FeBO 3 has two modes of antiferromagnetic spin resonance: a low frequency quasiferromagnetic mode (q-FM) and a high frequency quasiantiferromagnetic mode (q-AFM) [43,44]. In spherical coordinates, where θ is the angle between L and the z axis, and ψ is the angle between the x axis and projection of L on the xy plane, one finds L ¼ 2jM 1;2 jðsin θ cos ψ; sin θ sin ψ; cos θÞ.…”

mentioning

confidence: 99%

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Terahertz Optomagnetism: Nonlinear THz Excitation of GHz Spin Waves in Antiferromagnetic FeBO3

Mashkovich¹,

Grishunin

Mikhaylovskiy

et al. 2019

Phys. Rev. Lett.

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A nearly single cycle intense terahertz (THz) pulse with peak electric and magnetic fields of 0.5 MV=cm and 0.16 T, respectively, excites both modes of spin resonances in the weak antiferromagnet FeBO 3 . The high frequency quasiantiferromagnetic mode is excited resonantly and its amplitude scales linearly with the strength of the THz magnetic field, whereas the low frequency quasiferromagnetic mode is excited via a nonlinear mechanism that scales quadratically with the strength of the THz electric field and can be regarded as a THz inverse Cotton-Mouton effect. THz optomagnetism is shown to be more energy efficient than similar effects reported previously for the near-infrared spectral range.

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confidence: 67%

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confidence: 99%

Terahertz Optomagnetism: Nonlinear THz Excitation of GHz Spin Waves in Antiferromagnetic FeBO3

Mashkovich¹,

Grishunin

Mikhaylovskiy

et al. 2019

Phys. Rev. Lett.

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“…1c ), which corresponds to the frequency of the quasi-antiferromagnetic mode in FeBO 3 (ref. 35 ). The amplitude of the oscillations gradually decreases as the temperature approaches the Néel temperature T N ∼350 K (see Supplementary Fig.…”

Section: Resultsmentioning

confidence: 99%

Ultrafast optical modification of exchange interactions in iron oxides

et al. 2015

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Ultrafast non-thermal manipulation of magnetization by light relies on either indirect coupling of the electric field component of the light with spins via spin-orbit interaction or direct coupling between the magnetic field component and spins. Here we propose a scenario for coupling between the electric field of light and spins via optical modification of the exchange interaction, one of the strongest quantum effects with strength of 103 Tesla. We demonstrate that this isotropic opto-magnetic effect, which can be called inverse magneto-refraction, is allowed in a material of any symmetry. Its existence is corroborated by the experimental observation of terahertz emission by spin resonances optically excited in a broad class of iron oxides with a canted spin configuration. From its strength we estimate that a sub-picosecond modification of the exchange interaction by laser pulses with fluence of about 1 mJ cm−2 acts as a pulsed effective magnetic field of 0.01 Tesla.

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“…At RT, the magnon frequency was determined in [4] between 25 GHz and 64 GHz depending on the sample orientation, without external magnetic field. The optical antiferromagnetic mode was measured to be ~0.3 THz in an external field of 0.1 T at RT [5]. However, to the best of our knowledge, there is no measurement reported in the literature of dynamically resolved measurements of the relaxation following the excitation close to the magnon frequency.…”

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confidence: 89%

“…2(d)) displays a decrease of some frequencies with an increase of the external magnetic field. The frequencies between 0.3 THz and 0.35 THz are of particular interest: according to [5] and the extrapolation of the data of [8] to room temperature, the anti-ferromagnetic mode is located between these frequencies. This mode has then been excited with the single-cycle THz pulse.…”

mentioning

confidence: 99%