Anisotropic gigahertz frequency antiferromagnetic resonance in layered van der Waals semiconductor

Antiferromagnetic spintronics in layered van der Waals magnetic systems provides unique advantages in manipulating magnon modes and provides emerging device concepts for microwave electronics. CrSBr, an air-stable vdW antiferromagnetic semiconductor, exhibits intralayer ferromagnetic order and interlayer antiferromagnetic coupling with in-plane magnetic easy axis. In this talk, we report anisotropic gigahertz frequency antiferromagnetic resonance of bulk CrSBr using broadband microwave absorption spectroscopy. We observe a rich spectrum of resonances that reflect crystalline uniaxial anisotropy, with signatures of the spin-flop transition. The role of interlayer antiferromagnetic exchange will also be discussed.