  The recent isolation of two-dimensional (2D) magnets offers tantalizing
opportunities for spintronics and magnonics at the limit of miniaturization.
One of the key advantages of atomically-thin materials is their outstanding
deformation capacity, which provides an exciting avenue to control their
properties by strain engineering. Herein, we investigate the magnetic
properties, magnon dispersion and spin dynamics of the air-stable 2D magnetic
semiconductor CrSBr ($T_C$ = 146 K) under mechanical strain using
first-principles calculations. Our results provide a deep microscopic analysis
of the competing interactions that stabilize the long-range ferromagnetic order
in the monolayer. We showcase that the magnon dynamics of CrSBr can be modified
selectively along the two main crystallographic directions as a function of
applied strain, probing the potential of this quasi-1D electronic system for
magnon straintronics applications. Moreover, we predict a strain-driven
enhancement of $T_C$ considering environmental screening by ~30%, allowing the
propagation of spin waves at higher temperatures.
