Creation of magnetic rogue waves

Rogue waves, first discovered in the ocean, are extraordinarily large amplitude waves which can form in relatively calm environments. Magnetic materials also support waves, but with a completely different set of underlying physics. We demonstrate the possibility of generating magnetic rogue waves by applying an abstract form of time reversal. Magnetic systems have important differences from the other media which admit rogue waves; they are inherently anisotropic and have many tunable parameters such as the magnitude and direction of an applied field. We investigate the role of anisotropy and these tunable parameters in the formation and properties of magnetic rogue waves. Through analytic calculations, we identify the important wave vectors and frequencies, typically ranging from 10 to 25 GHz, of the spin waves involved in the creation of magnetic rogue waves. We then correlate this information with the overall efficiency of the rogue wave generation process.