Bistability of Cavity Magnonics System with Magnon Kerr Effect
Debabrata Ganthya1, Arumay Parai2, Paresh Chandra Jana3

1Debabrata Ganthya*, Department of Physics, Vidyasagar University, Midnapore, India.
2Arumay Parai, Department of Physics, Vidyasagar University, Midnapore, India.
3Paresh Chandra Jana, Department of Physics, Vidyasagar University, Midnapore, India.
Manuscript received on 21 March 2022. | Revised Manuscript received on 01 April 2022. | Manuscript published on 30 May 2022. | PP: 1-6 | Volume-12 Issue-2, May 2022. | Retrieval Number: 100.1/ijsce.B35520512222 | DOI: 10.35940/ijsce.B3552.0512222
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Abstract: 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. 
Keywords: Kerr Effect Caused by Magne to Cry Stalline Anisotropy in YIG.
Scope of the Article: Nano electronics and Quantum Computing