Adjusted oscillator strength matching for hybrid magnetic and electric excitations in Dy<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow /><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>Fe<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow /><mml:mrow><mml:mn>5</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>O<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display

Rogers, P. D.; Choi, Youn-Seok; Standard, E. C.; Kang, Tae Sun; Ahn, K. H.; Dubroka, Adam; Maršík, Přemysl; Ch, Wang; Bernhard, C.; Park, S.; Cheong, Sang‐Wook; Kotelyanskii, Michael; Sirenko, A. A.

doi:10.1103/physrevb.83.174407

Cited by 19 publications

(14 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several important aspects for analysis of the optical spectra for samples with the magnetic permeability μ = 1 are summarized in Ref. 4. Examples of our recent RAE measurements are in Refs.…”

Section: Introductionmentioning

confidence: 99%

Synchrotron radiation-based far-infrared spectroscopic ellipsometer with full Mueller-matrix capability

Stanislavchuk

Kang

Rogers

et al. 2013

Review of Scientific Instruments

Self Cite

View full text Add to dashboard Cite

We developed far-IR spectroscopic ellipsometer at the U4IR beamline of the National Synchrotron Light Source in Brookhaven National Laboratory. This ellipsometer is able to measure both, rotating analyzer and full-Mueller matrix spectra using rotating retarders, and wire-grid linear polarizers. We utilize exceptional brightness of synchrotron radiation in the broad spectral range between about 20 and 4000 cm(-1). Fourier-transform infrared (FT-IR) spectrometer is used for multi-wavelength data acquisition. The sample stage has temperature variation between 4.2 and 450 K, wide range of θ-2θ angular rotation, χ tilt angle adjustment, and X-Y-Z translation. A LabVIEW-based software controls the motors, sample temperature, and FT-IR spectrometer and also allows to run fully automated experiments with pre-programmed measurement schedules. Data analysis is based on Berreman's 4 × 4 propagation matrix formalism to calculate the Mueller matrix parameters of anisotropic samples with magnetic permeability μ ≠ 1. A nonlinear regression of the rotating analyzer ellipsometry and∕or Mueller matrix (MM) spectra, which are usually acquired at variable angles of incidence and sample crystallographic orientations, allows extraction of dielectric constant and magnetic permeability tensors for bulk and thin-film samples. Applications of this ellipsometer setup for multiferroic and ferrimagnetic materials with μ ≠ 1 are illustrated with experimental results and simulations for TbMnO3 and Dy3Fe5O12 single crystals. We demonstrate how magnetic and electric dipoles, such as magnons and phonons, can be distinguished from a single MM measurement without adducing any modeling arguments. The parameters of magnetoelectric components of electromagnon excitations are determined using MM spectra of TbMnO3.

show abstract

Section: Introductionmentioning

confidence: 99%

Synchrotron radiation-based far-infrared spectroscopic ellipsometer with full Mueller-matrix capability

Stanislavchuk

Kang

Rogers

et al. 2013

Review of Scientific Instruments

Self Cite

View full text Add to dashboard Cite

show abstract

“…Detailed investigations of spin excitations in high magnetic field provide the experimental basis for the construction of accurate microscopic magnetic Hamiltonians [7][8][9][10] . THz spectroscopy has also provided the observations of electromagnons [11][12][13][14][15][16][17][18] which are electric-dipole-active spin excitations that receive their electric-dipole activity via microscopic magnetoelectric interactions.…”

Section: Introductionmentioning

confidence: 99%

Terahertz-frequency magnetoelectric effect in Ni-doped CaBaCo4O7

et al. 2017

View full text Add to dashboard Cite

We present a study of terahertz frequency magnetoelectric effect in ferrimagnetic pyroelectric CaBaCo 4 O 7 and its Ni-doped variants. The terahertz absorption spectrum of these materials consists of spin excitations and low-frequency infrared-active phonons. We studied the magnetic-fieldinduced changes in the terahertz refractive index and absorption in magnetic fields up to 17 T.We find that the magnetic field modulates the strength of infrared-active optical phonons near 1.2 and 1.6 THz. We use the Lorentz model of the dielectric function to analyze the measured magnetic-field dependence of the refractive index and absorption. We propose that most of the magnetoelectric effect is contributed by the optical phonons near 1.6 THz and higher-frequency resonances. Our experimental results can be used to construct and validate more detailed theoretical descriptions of magnetoelectricity in CaBaCo 4−x Ni x O 7 .

show abstract

“…On the other hand, the electromagnon can be excited by the light E vector rather than by the light H vector and thus the resonance shows up in the dielectric constant spectrum EðoÞ. Up to date, the emergence of electromagnons was argued in a variety of magnetic oxides such as perovskite R MnO 3 [8][9][10], R Mn 2 O 5 [11], hexagonal YMnO 3 [12], BiFeO 3 [13], Ba 2 Mg 2 Fe 12 O 22 [14,15], CuFe 1Àx Ga x O 2 [16], Ba 2 CoGe 2 O 7 [17], and Dy 3 Fe 5 O 12 garnet [18]. Contrary to the origin of the ferroelectricity in multiferroics based on Eq.…”

Section: Introductionmentioning

confidence: 97%

Terahertz magnetoelectric response via electromagnons in magnetic oxides

Kida¹,

Tokura²

2012

Journal of Magnetism and Magnetic Materials

View full text Add to dashboard Cite

Terahertz magnetic resonance driven by the light electric field, now referred to as electromagnon, has stimulated interest due to its strong candidate for future spin-electronics. One unique characteristic of electromagnons is the terahertz magnetochromism, a color change by external magnetic field, as recently demonstrated in the hexaferrite. By taking perovskite manganites and hexaferrite as model cases, the current understating of the electromagnon activity is discussed in terms of the symmetric exchange mechanism.Comment: 18 pages including 4 figures, Short overview of electromagnon study, Comments are welcom

show abstract

Adjusted oscillator strength matching for hybrid magnetic and electric excitations in Dy3Fe5O

Cited by 19 publications

References 24 publications

Synchrotron radiation-based far-infrared spectroscopic ellipsometer with full Mueller-matrix capability

Synchrotron radiation-based far-infrared spectroscopic ellipsometer with full Mueller-matrix capability

Terahertz-frequency magnetoelectric effect in Ni-doped CaBaCo4O7

Terahertz magnetoelectric response via electromagnons in magnetic oxides

Contact Info

Product

Resources

About