Electromagnon excitation in the field-induced nonlinear ferrimagnetic phase of Ba2Mg2Fe12O22 studied by polarized inelastic neutron and terahertz time-domain optical spectroscopy

Nakajima, Taro; Takahashi, Youtarou; Kibayashi, Shunsuke; Matsuda, Masaaki; Kakurai, Kazuhisa; Ishiwata, Shintaro; Taguchi, Yasujiro; Tokura, Yoshinori; Arima, Taka-hisa

doi:10.1103/PhysRevB.93.035119

Title: Electromagnon excitation in the field-induced nonlinear ferrimagnetic phase of Ba₂Mg₂Fe₁₂O₂₂ studied by polarized inelastic neutron and terahertz time-domain optical spectroscopy

Abstract

We have studied magnetic excitations in a field-induced noncollinear commensurate ferrimagnetic phase of Ba₂Mg₂Fe₁₂O₂₂ by means of polarized inelastic neutron scattering (PINS) and terahertz (THz) time-domain optical spectroscopy under magnetic field. A previous THz spectroscopy study reported that the field-induced phase exhibits electric-dipole-active excitations with energies of around 5 meV [Kida et al., Phys. Rev. B 83, 064422 (2011)]. In the present PINS measurements, we observed inelastic scattering signals around 5 meV at the zone center in the spin-flip channel. This directly shows that the electric-dipole-active excitations are indeed of magnetic origin, that is, electromagnons. In addition, the present THz spectroscopy confirms that the excitations have oscillating electric polarization parallel to the c axis. In terms of the spin-current model (Katsura-Nagaosa-Balatsky model), the noncollinear magnetic order in the field-induced phase can induce static electric polarization perpendicular to the c axis, but not dynamic electric polarization along the c axis. Furthermore, we suggest that the electromagnon excitations can be explained by applying the magnetostriction model to the out-of-phase oscillations of the magnetic moments, which is deduced from the present experimental results.

Authors:

Nakajima, Taro ^[1]; Takahashi, Youtarou ^[2]; Kibayashi, Shunsuke ^[3]; Matsuda, Masaaki ^[4]; Kakurai, Kazuhisa ^[5]; Ishiwata, Shintaro ^[3]; Taguchi, Yasujiro ^[1]; Tokura, Yoshinori ^[6]; Arima, Taka-hisa ^[7]

RIKEN Center for Emergent Matter Science (CEMS), Saitama (Japan)
Univ. of Tokyo, Tokyo (Japan); Japan Science and Technology Agency, Tokyo (Japan)
Univ. of Tokyo, Tokyo (Japan)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
RIKEN Center for Emergent Matter Science (CEMS), Saitama (Japan); Japan Atomic Energy Agency, Ibaraki (Japan)
RIKEN Center for Emergent Matter Science (CEMS), Saitama (Japan); Univ. of Tokyo, Tokyo (Japan)
RIKEN Center for Emergent Matter Science (CEMS), Saitama (Japan); Univ. of Tokyo, Kashiwa (Japan)

Publication Date:: Tue Jan 19 00:00:00 EST 2016

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1266005

Alternate Identifier(s):: OSTI ID: 1235785

Grant/Contract Number:: AC05-00OR22725; IPTS-11376.1

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review B

Additional Journal Information:: Journal Volume: 93; Journal Issue: 3; Journal ID: ISSN 2469-9950

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats


                    Nakajima, Taro, Takahashi, Youtarou, Kibayashi, Shunsuke, Matsuda, Masaaki, Kakurai, Kazuhisa, Ishiwata, Shintaro, Taguchi, Yasujiro, Tokura, Yoshinori, and Arima, Taka-hisa. Electromagnon excitation in the field-induced nonlinear ferrimagnetic phase of Ba2Mg2Fe12O22 studied by polarized inelastic neutron and terahertz time-domain optical spectroscopy.  United States: N. p., 2016. 
Web.  doi:10.1103/PhysRevB.93.035119.

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                    Nakajima, Taro, Takahashi, Youtarou, Kibayashi, Shunsuke, Matsuda, Masaaki, Kakurai, Kazuhisa, Ishiwata, Shintaro, Taguchi, Yasujiro, Tokura, Yoshinori, & Arima, Taka-hisa. Electromagnon excitation in the field-induced nonlinear ferrimagnetic phase of Ba2Mg2Fe12O22 studied by polarized inelastic neutron and terahertz time-domain optical spectroscopy.  United States.  https://doi.org/10.1103/PhysRevB.93.035119

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                    Nakajima, Taro, Takahashi, Youtarou, Kibayashi, Shunsuke, Matsuda, Masaaki, Kakurai, Kazuhisa, Ishiwata, Shintaro, Taguchi, Yasujiro, Tokura, Yoshinori, and Arima, Taka-hisa. Tue .  
"Electromagnon excitation in the field-induced nonlinear ferrimagnetic phase of Ba2Mg2Fe12O22 studied by polarized inelastic neutron and terahertz time-domain optical spectroscopy".  United States.  https://doi.org/10.1103/PhysRevB.93.035119.  https://www.osti.gov/servlets/purl/1266005.

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@article{osti_1266005,

  title        = {Electromagnon excitation in the field-induced nonlinear ferrimagnetic phase of Ba2Mg2Fe12O22 studied by polarized inelastic neutron and terahertz time-domain optical spectroscopy},

  author       = {Nakajima, Taro and Takahashi, Youtarou and Kibayashi, Shunsuke and Matsuda, Masaaki and Kakurai, Kazuhisa and Ishiwata, Shintaro and Taguchi, Yasujiro and Tokura, Yoshinori and Arima, Taka-hisa},

  abstractNote = {We have studied magnetic excitations in a field-induced noncollinear commensurate ferrimagnetic phase of Ba2Mg2Fe12O22 by means of polarized inelastic neutron scattering (PINS) and terahertz (THz) time-domain optical spectroscopy under magnetic field. A previous THz spectroscopy study reported that the field-induced phase exhibits electric-dipole-active excitations with energies of around 5 meV [Kida et al., Phys. Rev. B 83, 064422 (2011)]. In the present PINS measurements, we observed inelastic scattering signals around 5 meV at the zone center in the spin-flip channel. This directly shows that the electric-dipole-active excitations are indeed of magnetic origin, that is, electromagnons. In addition, the present THz spectroscopy confirms that the excitations have oscillating electric polarization parallel to the c axis. In terms of the spin-current model (Katsura-Nagaosa-Balatsky model), the noncollinear magnetic order in the field-induced phase can induce static electric polarization perpendicular to the c axis, but not dynamic electric polarization along the c axis. Furthermore, we suggest that the electromagnon excitations can be explained by applying the magnetostriction model to the out-of-phase oscillations of the magnetic moments, which is deduced from the present experimental results.},

  doi          = {10.1103/PhysRevB.93.035119},

  journal      = {Physical Review B},

  number       = 3,

  volume       = 93,

  place        = {United States},

  year         = {Tue Jan 19 00:00:00 EST 2016},

  month        = {Tue Jan 19 00:00:00 EST 2016}

}

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Works referencing / citing this record:

Electromagnon Resonance at Room Temperature with Gigantic Magnetochromism
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Title: Electromagnon excitation in the field-induced nonlinear ferrimagnetic phase of Ba2Mg2Fe12O22 studied by polarized inelastic neutron and terahertz time-domain optical spectroscopy

Abstract

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Low-magnetic-field control of dielectric constant at room temperature realized in Ba _0.5 Sr _1.5 Zn ₂ Fe ₁₂ O ₂₂
journal, July 2009

Polarization Analysis of Thermal-Neutron Scattering
journal, May 1969

Theory of Electromagnons in CuO
journal, May 2015

Possible evidence for electromagnons in multiferroic manganites
journal, January 2006

Low-Magnetic-Field Control of Electric Polarization Vector in a Helimagnet
journal, March 2008

Electric Polarization Rotation in a Hexaferrite with Long-Wavelength Magnetic Structures
journal, April 2005

Ferroelectric Polarization Reversal by a Magnetic Field in Multiferroic Y-type Hexaferrite Ba ₂ Mg ₂ Fe ₁₂ O ₂₂
journal, February 2008

Realization of Giant Magnetoelectricity in Helimagnets
journal, January 2010

Neutron diffraction studies on the multiferroic conical magnet ${Ba}_{2} {Mg}_{2} {Fe}_{12} O_{22}$
journal, May 2010

Two distinct ferroelectric phases in the multiferroic $Y$ -type hexaferrite ${Ba}_{2} {Mg}_{2} {Fe}_{12} O_{22}$
journal, November 2009

Magnetic Structure Change in Ba ₂ Mg ₂ Fe ₁₂ O ₂₂
journal, April 1986

Cation Distribution and Helimagnetic Structure of the Ba ₂ (Zn _{1- x} Mg _x ) ₂ Fe ₁₂ O ₂₂ System as Revealed by Magnetization Measurements and Neutron Diffraction
journal, September 2001

Role of the Dzyaloshinskii-Moriya interaction in multiferroic perovskites
journal, March 2006

Spin Current and Magnetoelectric Effect in Noncollinear Magnets
journal, July 2005

Ferroelectricity in Spiral Magnets
journal, February 2006

Gigantic terahertz magnetochromism via electromagnons in the hexaferrite magnet Ba $_{2}$ Mg $_{2}$ Fe $_{12}$ O $_{22}$
journal, February 2011

Electric-dipole-active magnetic resonance in the conical-spin magnet ${Ba}_{2} {Mg}_{2} {Fe}_{12} O_{22}$
journal, December 2009

Origin of Electromagnon Excitations in Multiferroic $R {MnO}_{3}$
journal, January 2009

Systematics of electromagnons in the spiral spin-ordered states of $R {MnO}_{3}$
journal, May 2009

Terahertz time-domain spectroscopy of electromagnons in multiferroic perovskite manganites [Invited]
journal, January 2009

Electromagnons in Multiferroic ${YMn}_{2} O_{5}$ and ${TbMn}_{2} O_{5}$
journal, January 2007

Theory of Electromagnons in the Multiferroic Mn Perovskites: The Vital Role of Higher Harmonic Components of the Spiral Spin Order
journal, April 2010

Colossal magnon-phonon coupling in multiferroic ${Eu}_{0.75} Y_{0.25} Mn O_{3}$
journal, August 2007

Magnetic and Magnetoelectric Excitations in ${TbMnO}_{3}$
journal, March 2009

Electrically driven spin excitation in the ferroelectric magnet ${DyMnO}_{3}$
journal, September 2008

VESTA : a three-dimensional visualization system for electronic and structural analysis
journal, May 2008

Magnetic and magnetoelectric excitations in TbMnO$_3$
text, January 2009

Terahertz time-domain spectroscopy of electromagnons in multiferroic perovskite manganites
text, January 2009

Realization of giant magnetoelectricity in helimagnets
text, January 2010

Spin current and magneto-electric effect in non-collinear magnets
text, January 2004

Ferroelectricity in spiral magnets
text, January 2005

Possible evidence for electromagnons in multiferroic manganites
text, January 2006

Electromagnons in multiferroic YMn2O5 and TbMn2O5
text, January 2006

Electromagnon Resonance at Room Temperature with Gigantic Magnetochromism
journal, April 2018

Study of the Structural and Magnetic Properties of Co-Substituted Ba2Mg2Fe12O22 Hexaferrites Synthesized by Sonochemical Co-Precipitation
journal, April 2019

Giant magnetoelectric effects achieved by tuning spin cone symmetry in Y-type hexaferrites
journal, September 2017

Electromagnon in the Y-type hexaferrite ${BaSrCoZnFe}_{11} {AlO}_{22}$
journal, April 2018