Magneto-Optical Sensing of the Pressure Driven Magnetic Ground States in Bulk CrSBr.

We report on low temperature magneto-photoluminescence experiments performed on a semiconducting bulk van der Waals antiferromagnet. Applying hydrostatic pressure strongly modifies the interlayer exchange interaction strength, by 1700 % at P = 6 GPa, and the magnetocrystalline anisotropy parameters, providing the unique oportunity explore the magnetic phase diagram of this anisotropic antiferromagnet. By probing the evolution of excitons in this bulk material, we describe the different magnetic phases by extracting the saturation magnetic field at different values of the applied pressure. We generate a spin-flop magnetic phase which is stabilized because of the modified competition between interlayer exchange and magnetocrystalline anisotropy.

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