Title :
Antiferromagnetic resonance and impurity spin excitations in YFeO3: submillimeter quasioptical spectroscopy in high magnetic fields
Author :
Mukhin, A.A. ; Lobanov, A.N. ; Goiran, M. ; Leotin, J. ; Volkov, A.A.
Author_Institution :
A.M. Prokhorov Gen. Phys. Inst., Russian Acad. of Sci., Moscow
Abstract :
Transmission polarization control spectra T(B) of YFeO3 weak ferromagnet measured in long-pulsed magnetic fields in Faraday geometry exhibit strong effects of polarization plane rotation near the quasiferromagnetic AFMR as well as low frequency impurity modes. New ascending impurity branch including five lines was observed at high magnetic field (10 - 30 T) at 96 GHz and 140 GHz in addition to the known low-field descending impurity branch. Simulated transmission spectra reproduce well the main features of the experimental results.
Keywords :
antiferromagnetic resonance; excited states; infrared spectroscopy; magnetic fields; submillimetre wave spectroscopy; yttrium compounds; Faraday geometry; YFeO3; ascending impurity branch; frequency 140 GHz; frequency 96 GHz; impurity spin excitations; long-pulsed magnetic fields; quasiferromagnetic antiferromagnetic resonance; submillimeter quasioptical spectroscopy; transmission polarization control spectra; Antiferromagnetic materials; Frequency measurement; Geometry; Impurities; Magnetic field measurement; Magnetic fields; Magnetic resonance; Polarization; Rotation measurement; Spectroscopy; antiferromagnetic resonance; field; high magnetic; impurity mode; polarimetry; submillimeter wave spectroscopy;
Conference_Titel :
Infrared and Millimeter Waves, 2007 and the 2007 15th International Conference on Terahertz Electronics. IRMMW-THz. Joint 32nd International Conference on
Conference_Location :
Cardiff
Print_ISBN :
978-1-4244-1438-3
DOI :
10.1109/ICIMW.2007.4516835
