Magnetooptical Effects at Submillimetre Wavelengths Near AFMR in YFeO3
Magnetooptical Effects at Submillimetre Wavelengths Near AFMR in YFeO3
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YFeO3 中近 AFMR 亚毫米波长的磁光效应
DOI：
10.1051/jp4:19971290
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
I. Parsegov
中科院分区：
文献类型：
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作者：
A. Mukhin;V. Travkin;S. P. Lebedev;A. Prokhorov;A. Balbashov;I. Parsegov
用准光学亚毫米返波振荡器光谱仪测量了YFeO 3单晶在AFMR模（ν110 cm-1）附近的透射谱T（ν）、椭圆率谱ρ（ν）和法拉第转角谱αF（ν）。在AFMR附近观察到T（ν）、ρ（ν）和αF（ν）谱的共振行为。通过理论计算和计算机模拟，可以描述所观测到的T（v）、ρ（v）和αF（v）谱，并确定YFeO 3的介电常数和磁导率的对角和非对角分量。揭示了沿磁矩（m ~ 250 Oe）方向的弱磁场对共振线的线形和强度的异常影响，并用共振线内两个简正模的干涉解释了这种影响.
Spectra of the transmission T(ν), ellipticity ρ(ν) and Faraday rotation angle αF(ν) have been measured in YFeO 3 single crystals near AFMR mode (ν110 cm -1 ) using the quasi-optical submillimetre backward-wave-oscillator spectrometer. A resonance behaviour of the T(ν), ρ(ν) and αF(ν) spectra was observed near AFMR. The theoretical calculations and computer simulations made it possible to describe the observed T(v), ρ(ν) and αF(ν) spectra and to determine both diagonal and non-diagonal components of the permittivity and permeability of the YFeO 3 . An unusual effect of the weak magnetic field (H250 Oe) along magnetic moment (m∥c-axis) on the line-shape and intensity of the resonance line was revealed and explained by an interference of two normal modes inside the resonance line.