Magnetic resonances in EuSn${}_2$As${}_2$ single crystal

Abstract

In this work, we report the broad-band ferromagnetic resonance spectroscopy of EuSn${}_2$As${}_2$ 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.

6 pages, 4 figures, 34 references

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• Antiferromagnetic topological insulators
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Cited by in corpus (1)

• Universal negative magnetoresistance in antiferromagnetic metals caused by symmetry breaking of electron wave functions