Xinxi Zeng

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The terahertz magnetic properties of perovskite-like SmFeO3 ceramic are investigated over a broad temperature range, especially at ultralow temperatures, using terahertz time-domain spectroscopy. It is shown that both resonant frequencies of quasi-ferromagnetic and quasi-antiferromagnetic modes have blue shifts with the decreasing temperature due to the(More)
Both continuous and discontinuous spin reorientation transitions in the HoFeO₃ orthoferrite have been further investigated in this paper. Here, we use terahertz spectroscopy through the terahertz ferromagnetic and antiferromagnetic resonances to study the thermodynamics of the spin reorientation transitions in HoFeO₃ ceramics. The spin reorientations are(More)
We investigate the resonant modes of split-ring resonator (SRR) metamaterials that contain high-permittivity BST block numerically and experimentally. We observe interesting mode-jumping phenomena from the BST-included SRR absorber structure as the excitation wave is incident perpendicularly to the SRR plane. Specifically, when the electric field is(More)
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