What is Spin Wave?

• A spin wave is a collective motion of a magnetic moment in magnetically ordered materials.
• It is a propagating disturbance in the ordering of a magnetic material.
• These low-lying collective excitations occur in magnetic lattices with continuous symmetry. 
• The spin wave plays an important role in spintronics as a carrier of spin current, that is, a flow of spin angular momentum. 

What is Spintronics?

• It is also known as spin electronics, or the study of the intrinsic spin of the electronand its associated magnetic moment.
• In solid-state devices offer to harness electron spins.
• Their collective precession can carry information encoded in its amplitude, phase, wavelength, and frequency without any physical motion of particles, eliminating unwanted energy waste and promising wave-based computing.