Magnetic resonances in EuSn$_2$As$_2$ single crystal
I.A. Golovchanskiy, E.I. Maltsev, I.V. Shchetinin, V.A. Vlasenko, P.S., Dzhumaev, K. Pervakov, O.V. Emelyanova, A.Yu. Tsvetkov, N.N. Abramov, V.M., Pudalov, V.S. Stolyarov
TL;DR
This study investigates the magnetic resonances in EuSn₂As₂ single crystals using broad-band ferromagnetic resonance spectroscopy, revealing the antiferromagnetic resonance mode, a transition to paramagnetic resonance, and an additional spectral line linked to Eu sub-lattice magnetism.
Contribution
It provides detailed spectroscopic analysis of EuSn₂As₂, identifying magnetic resonance modes and discovering an unexplained spectral line related to Eu magnetism.
Findings
Observation of acoustic resonance mode in antiferromagnetic phase
Transition to paramagnetic resonance above ordering temperature
Detection of an additional spectral line with unclear origin
Abstract
In this work, we report the broad-band ferromagnetic resonance spectroscopy of EuSnAs single crystals at different temperatures in combination with magnetization measurements and structural characterization. We observe conventional collective acoustic resonance mode of the A-type antiferromagnetic spin-flop phase in the Eu sub-lattice, and its transition to the paramagnetic resonance above the ordering temperature. Furthermore, we observe reproducibly additional well-defined spectral line. The origin of the additional line remains unclear. However, its temperature dependence attributes it to magnetism in the Eu sub-lattice.
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