Title :
Terahertz and sub-terahertz spectroscopy of magnetic excitations in solids
Author :
Prokhorov, A. ; Dressel, M. ; Loidl, A. ; Mukhin, A. ; Pimenov, A. ; Spektor, I. ; Travkin, V.
Author_Institution :
Gen. Phys. Inst., Acad. of Sci., Moscow, Russia
fDate :
27 Sept.-1 Oct. 2004
Abstract :
Various kinds of magnetic excitations (antiferromagnetic resonances, impurity modes, crystal field transitions) are studied in La1-xSrxMnO3 manganites and molecular cluster Mn12-ac by means of quasioptical BWO spectroscopic technique. Different measurement regimes (transmittivity and reflectivity vs frequency and/or magnetic field for a definite polarization) enable to extract spectra of magnetic permeabilities μ\´(ν) and μ"(ν) and identify the origin of observed excitations.
Keywords :
antiferromagnetic materials; antiferromagnetic resonance; backward wave oscillators; ferromagnetic-antiferromagnetic transitions; infrared spectra; lanthanum compounds; magnetic impurities; magnetic permeability; manganese; metal clusters; strontium compounds; submillimetre wave spectra; La1-xSrxMnO3; Mn; antiferromagnetic resonances; crystal field transitions; definite polarization; impurity modes; magnetic excitations; magnetic permeabilities; quasioptical BWO spectroscopic technique; reflectivity; subterahertz spectroscopy; terahertz spectroscopy; transmittivity; Antiferromagnetic materials; Frequency measurement; Impurities; Magnetic field measurement; Magnetic resonance; Permeability measurement; Reflectivity; Solids; Spectroscopy; Strontium;
Conference_Titel :
Infrared and Millimeter Waves, 2004 and 12th International Conference on Terahertz Electronics, 2004. Conference Digest of the 2004 Joint 29th International Conference on
Print_ISBN :
0-7803-8490-3
DOI :
10.1109/ICIMW.2004.1422128
