Coupled R and Fe Magnetic Excitations in RFe3(Bo3)4 Multiferroics

A.M. Kuzmenko; A.A. Mukhin; V.Y. Ivanov; L.N. Bezmaternikh

doi:10.4028/www.scientific.net/SSP.190.269

Paper Titles

Interplay between Local Electronic Structure, Crystalline Structure and Magnetic Ordering in Intermetallic Compounds Ce₂Fe_17−xMn_x
p.251

Spectrum of the Coupled Waves in Magnetics Having the Ferromagnetic Spiral
p.257

Magnetic Properties of Nd_0.6Dy_0.4Fe₃(Bo₃)₄
p.261

The Influence of Magnetoelectric Interactions on the Domain Walls in Multiferroics
p.265

Coupled R and Fe Magnetic Excitations in RFe₃(Bo₃)₄ Multiferroics
p.269

Ellipsometric Study of Anisotropy Permittivity of Hexagonal Manganites RMnO₃ (R = Ho, Tm, Yb)
p.273

Charge Density and Density Waves in Vicinity of the Phase Transition to an Incommensurate Magnetic Structure in RMn₂O₅ Oxides
p.277

Bending Modes and Magnetoelectric Effects in Asymmetric Ferromagnetic-Ferroelectric Structure
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Spatially Modulated Antiferromagnetic Structures in Multiferroic with Biaxial Anisotropy
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HomeSolid State PhenomenaSolid State Phenomena Vol. 190Coupled R and Fe Magnetic Excitations in...

Coupled R and Fe Magnetic Excitations in RFe₃(Bo₃)₄ Multiferroics

Abstract:

Various resonance modes were observed in the transmission spectra of rare-earth iron borates RFe₃(BO₃)₄ (R = Nd³⁺, Sm³⁺, Gd³⁺) at the frequency range 100-600 GHz, which were attributed to collective magnetic excitations in the exchange coupled Fe-and R-subsystems, i.e. antiferromagnetic (Fe) resonance and electron transitions in the R-ions. Strong interaction of the Fe and R oscillations was revealed and theoretically analyzed taking into account feature of the R-ion ground state. Intensities of the coupled modes (contributions to magnetic permeability) strongly depend on a difference of Fe and R ions g-factors that allows defining the sign of the latter. In particular, an appreciable intensity of exchange (Nd) modes in NdFe₃(BO₃)₄ is caused by g^Nd_,|| < 0 whereas in GdFe₃(BO₃)₄ with g_Gd g_Fe 2 the exchange (Gd) modes were hided due to compensation of Fe and Gd contributions. In SmFe₃(BO₃)₄, despite a negligible Sm g-factor, the Sm modes were clear observed due to their excitation via coupling with the Fe-subsystem.

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Solid State Phenomena (Volume 190)

Pages:

269-272

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.190.269

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Online since:

June 2012

Authors:

A.M. Kuzmenko, A.A. Mukhin, V.Y. Ivanov, L.N. Bezmaternikh

Keywords:

Magnetic Resonance, Rare-Earth Iron Borates, Terahertz Spectroscopy

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