Investigations of spin dynamics for ZnCr2Se4 and CoCr2O4 chromium spinels in terahertz region

Terahertz (THz) time domain spectroscopy (THz-TDS) of a CoCr 2 O 4 and ZnCr 2 Se 4 single crystals have been performed under magnetic fields up to 10 Tesla and low temperatures. We observed the magnetic resonances originated from the spin dynamics of inter-sublattice exchange and screw spin structur...

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Published in2016 Progress in Electromagnetic Research Symposium (PIERS) p. 4510
Main Authors Fuhai Su, Peng Zhang, Hongying Mei, Shile Zhang, Xuliang Chen, Xuan Luo, Zhaorong Yang, Jianming Dai, Li Pi
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.08.2016
Subjects
Chromium
Magnetic domains
Magnetic resonance
Perpendicular magnetic anisotropy
Physics
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Summary:Terahertz (THz) time domain spectroscopy (THz-TDS) of a CoCr 2 O 4 and ZnCr 2 Se 4 single crystals have been performed under magnetic fields up to 10 Tesla and low temperatures. We observed the magnetic resonances originated from the spin dynamics of inter-sublattice exchange and screw spin structure in THz frequency region, which show pronouncedly anisotropic effect. The phase and polarization sensitive detection in THz-TDS allow us to reveal the large circular absorption dichroism and Faraday rotations under magnetic field in these materials.
DOI:10.1109/PIERS.2016.7735665