Magnetization states of canted antiferromagnetic YFeO3 investigated by terahertz time-domain spectroscopy

Kim, T. H.; Kang, Chul; Kee, Chul‐Sik; Lee, J.-H.; Cho, B. K.; Gruenberg, P.; Tokunaga, Yusuke; Tokura, Y.; Lee, J. S.

doi:10.1063/1.4937158

Cited by 14 publications

(17 citation statements)

References 22 publications

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“…5(c). The two anisotropy energies are deduced through the two resonant frequency formulas, where ω Sigma = 0.3 THz 15, 40 and ω Gamma = 0.52 THz and found to be and . All parameters are in good agreement with reference 43 .…”

Section: Resultssupporting

confidence: 66%

“…4). When vertically polarized THz magnetic pulse ( h y // b ) transmits through YFeO 3 with a thickness of 1.5 mm 40 , l experiences a driving toque and is tilted effectively by the spectral component around resonant frequency. Simultaneously, m starts to precess and oscillate along the z -axis due to internal magnetic fields.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, the factors are calculated using the cardinal sine or sinc function: f a ~sinc(2 π × 0.3 THz/ c × 1.5 mm) ~ 0.99 and f b ~ sinc(2 π × 0.3 × 10 12 s −1 / c × (−0.21) × 1.5 mm) ~ 0.84, where c is the speed of light. Fourth, the spin wave (or emission wave) perpendicular to the incident magnetic field is significantly dependent on the magnetization state 40 . To remove this effect, we saturated magnetization by applying h z,DC .

Figure 5THz emission waves and magnetic hysteresis curve.…”

Section: Resultsmentioning

confidence: 99%

“…The exchange energy, J , is deduced using the asymmetric exchange model 40 : J = M 0 D y / M s = 72.5 emu/g × 1.4 meV/1.54 emu/g = 63.7 meV, where M 0 is magnetic moment of ions per unit mass, and M s is the saturation magnetization in Fig. 5(c).…”

Section: Resultsmentioning

confidence: 99%

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Field-driven dynamics and time-resolved measurement of Dzyaloshinskii-Moriya torque in canted antiferromagnet YFeO3

Kim

Gruenberg

Han

et al. 2017

Sci Rep

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Electrical spin switching in an antiferromagnet is one of the key issues for both academic interest and industrial demand in new-type spin devices because an antiferromagnetic system has a negligible stray field due to an alternating sign between sub-lattices, in contrast to a ferromagnetic system. Naturally, questions arise regarding how fast and, simultaneously, how robustly the magnetization can be switched by external stimuli, e.g., magnetic field and spin current. First, the exploitation of ultrafast precessional motion of magnetization in antiferromagnetic oxide has been studied intensively. Regarding robustness, the so-called inertia-driven switching scenario has been generally accepted as the switching mechanism in antiferromagnet system. However, in order to understand the switching dynamics in a canted antiferromagnet, excited by magnetic field, accurate equation of motion and corresponding interpretation are necessary. Here, we re-investigate the inertia-driven switching process, triggered by the strict phase matching between effective driving field, dh/dt, and antiferromagnetic order parameters, l. Such theoretical approaches make it possible to observe the static parameters of an antiferromagnet, hosting Dzyaloshinskii–Moriya (DM) interaction. Indeed, we estimate successfully static parameters, such as DM, exchange, and anisotropy energies, from dynamical behaviour in YFeO3, studied using terahertz time-domain spectroscopy.

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Section: Resultssupporting

confidence: 66%

Section: Resultsmentioning

confidence: 99%

Figure 5THz emission waves and magnetic hysteresis curve.…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Field-driven dynamics and time-resolved measurement of Dzyaloshinskii-Moriya torque in canted antiferromagnet YFeO3

Kim

Gruenberg

Han

et al. 2017

Sci Rep

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“…[110][111][112][113][114][115][116][117][118][119][120][121][122][123][124][125] THz emission from spinpolarized currents emphasizing spin-dependent transport has become a contemporary topic of research. Such phases are useful in spintronics devices for the readout and writing of magnetic data.…”

Section: Thz Emission Spectroscopy Of Tmfeo 3 and Erfeo 3 Orthoferritesmentioning

confidence: 99%

Terahertz Emission Functionality of High‐Temperature Superconductors and Similar Complex Systems

Rana

Tonouchi

2019

Advanced Optical Materials

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During the past two decades, terahertz (THz) science and technology have rapidly expanded in all fundamental and applied aspects of physical, chemical, and biological sciences. In physical sciences, these developments have been twofolds: i) the use of THz technology in understanding the complexities of materials and ii) the exploration of new THz functionalities of emerging materials for further advancement of THz technology. Here, the THz emission spectroscopy and the ultrafast functionality of three pillars of electronic and magnetic condensed matter systems that emerged in the following order: high-temperature superconductors, colossal magnetoresistive manganites, and magnetoelectric multiferroics are reviewed. Emission functionality refers to the emitted THz radiation that carries the information of the underlying functional property of the material such that the overall effect evolves as the THz decoding of the information in a noninvasive manner and on an ultrafast timescale.The HTSC is one of the most attractive perovskite oxides in terms of fundamental science and future applications such as in quantum information and THz devices. Superconductivity

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Terahertz Electrodynamics in Transition Metal Oxides

Prajapati

Dagar

et al. 2019

Advanced Optical Materials

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The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adom.201900958. 2−y 2 , d z 2 ) levels. [35] The splitting of the d-orbital was successfully explained by the crystal field theory. The ground state properties of these materials are mainly governed by the two interactions; i) the electron correlations (U) and, ii) SOC (λ) in the crystal field split narrow bands. [36] Among d electron systems, electrons in 3d TMOs experiences large electron correlations due to localized nature of 3d orbitals. The idea of electron-electron interaction was given by Sir N. F. Mott in 1949. It originated from the fact that the NiO was expected to be a metal according to the band theory, while the experiments showed insulating behavior. [37][38][39][40][41] This disagreement of experiments with the theory was explained by Hubbard who attributed the insulating state to the splitting

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Magnetization states of canted antiferromagnetic YFeO3 investigated by terahertz time-domain spectroscopy

Cited by 14 publications

References 22 publications

Field-driven dynamics and time-resolved measurement of Dzyaloshinskii-Moriya torque in canted antiferromagnet YFeO3

Field-driven dynamics and time-resolved measurement of Dzyaloshinskii-Moriya torque in canted antiferromagnet YFeO3

Terahertz Emission Functionality of High‐Temperature Superconductors and Similar Complex Systems

Terahertz Electrodynamics in Transition Metal Oxides

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