Brandi L. Wooten

Oct 2, 2023 | link.aps.org | Dung Vu |Aerospace Engineering |Ryan Nelson |Brandi L. Wooten

In magnetic materials with strong spin-lattice coupling, magnon-phonon interactions can change the sensitivity of the lattice thermal conductivity in an applied magnetic field. Applying an out-of-plane magnetic field to change MnBi2Te4 between antiferromagnetic (AFM), canted antiferromagnetic (CAFM), and ferromagnetic (FM) phases, we controlled the lattice thermal conductivity, generating both a positive and a negative magnetic field dependence.