Microwave non-reciprocity of magnon excitations in a non-centrosymmetric antiferromagnet Ba${}_2$MnGe${}_2$O${}_7$

Abstract

We have investigated the microwave non-reciprocity for a non-centrosymmetric antiferromagnet Ba${}_2$MnGe${}_2$O${}_7$. The magnon modes expected by the conventional spin wave theory for staggered antiferromagnets are certainly observed. The magnitudes of exchange interaction and magnetic anisotropy are obtained by the comparison with the theory. The microwave non-reciprocity is identified for one of these mode. The relative magnitude of microwave non-reciprocity can be explained with use of spin wave theory and Kubo formula.

References in corpus (11)

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Cited by in corpus (9)

• Thermal Hall effect and topological edge states in a square lattice antiferromagnet
• Nonreciprocal Magnon by Symmetric Anisotropic Exchange Interaction in Honeycomb Antiferromagnet
• Designing Rashba-Dresselhaus effect in magnetic insulators
• Phase diagram of the square lattice Hubbard model with Rashba-type antisymmetric spin-orbit coupling
• Discovering momentum-dependent magnon spin texture in insulating antiferromagnets: Role of the Kitaev interaction
• Electrodynamics of magnetoelectric media and magnetoelectric fields
• In-situ electric field control of THz non-reciprocal directional dichroism in the multiferroic Ba${}_2$CoGe${}_2$O${}_7$
• Nonreciprocal magnon excitations by the Dzyaloshinskii-Moriya interaction on the basis of bond magnetic toroidal multipoles
• Classification of magnon thermal Hall systems based on U(1) to non-Abelian gauge fields