Submillimeter backward-wave oscillator spectroscopy of the rare-earth orthoferrites

Author

Kozlov, G.V. ; Lebedev, S.P. ; Mukhin, A.A. ; Prokhorov, A.S. ; Fedorov, L.V. ; Balbashov, A.M. ; Parsegov, I.Yu.

Author_Institution

Inst. of Gen. Phys., Acad. of Sci., Moscow, Russia

Volume

29

Issue

6

fYear

1993

fDate

11/1/1993 12:00:00 AM

Firstpage

3443

Lastpage

3445

Abstract

The complex dielectric permittivity and the complex magnetic permeability of the orthoferrites RFeO₃ (R=Y, Tm, Dy, Gd, Ho, Er, Tb) and Y_1-xLu_xFeO₃ have been investigated at submillimeter wavelengths v=100-1000 GHz. The parameters of the two antiferromagnetic resonance modes (resonance frequencies, linewidths, and mode contributions to the static permeability) have been obtained. The authors observed the electronic transitions inside the TM³⁺, Er³⁺, Ho³⁺ ground multiplets and found a strong influence of this excitation on the AFMR mode behavior. A permittivity increase (up to 30%) in TmFeO₃ resulting from the electrodipolar transitions in Tm³⁺ was observed

Keywords

antiferromagnetic properties of substances; antiferromagnetic resonance; ferrites; magnetic permeability; permittivity; rare earth compounds; spin dynamics; weak ferromagnetism; 100 to 1000 GHz; DyFeO₃; ErFeO₃; GdFeO₃; HoFeO₃; TbFeO₃; TmFeO₃; Y_1-xLu_xFeO₃; YFeO₃; antiferromagnetic resonance modes; backward-wave oscillator spectroscopy; complex dielectric permittivity; complex magnetic permeability; electrodipolar transitions; electronic transitions; ground multiplets; linewidths; mode contributions; rare-earth orthoferrites; resonance frequencies; spin dynamics; spin reorientation phase transitions; static permeability; submillimeter wavelengths; weak ferromagnets; Absorption; Crystals; Dielectrics; Frequency measurement; Interference; Magnetic resonance; Optical receivers; Oscillators; Permeability; Spectroscopy;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.281190

Filename

281190