Open AccessBistability of Cavity Magnonics System with Magnon Kerr Effect
Author(s) -
Debabrata Ganthya,
Arumay Parai,
Paresh Chandra Jana
Publication year - 2022
Publication title -
international journal of soft computing and engineering
Language(s) - English
Resource type - Journals
ISSN - 2231-2307
DOI - 10.35940/ijsce.b3552.0512222
Subject(s) - magnon , magnonics , bistability , condensed matter physics , yttrium iron garnet , physics , polariton , spin wave , quantum mechanics , ferromagnetism , spin polarization , spin hall effect , electron
In this study a comprehensive theory is developed for a hybrid cavity magnonics system consisting of a microwave cavity strongly coupled to spin excitations or magnons in a single-crystal yttrium iron garnet (YIG) sample with the magnons exhibiting nonlinear Kerr effect caused by magnetocrystalline anisotropy in YIG. The system dynamics is analysed in Hamilton Langevin formulation and it is shown that the magnon frequency shift due to Kerr nonlinearity is bistable with a upper and a lower branch of cavity magnon polaritons (CMP). Further by analytically and graphically studying different conditions imposed on the bistability equation it is demonstrated that the bistability is controllable by tuning the system parameters involved.