Spin coherence on the ferromagnetic spherical surface

Spintronics on flat surfaces has been studied over the years, and scenario is relatively well-known; however, there a lack of information when we consider non-flat surfaces. In this paper, are concerned about spin dynamics ferromagnetic model spherical surface. We use Schwinger bosonic formalism for describing thermodynamics operators in terms spinon operators. Opposite to two-dimensional model, which disordered at finite temperature, curvature surface provides non-zero critical temperature boson condensation, characterizes order even absence external magnetic fields. The then analyzed low-temperature regime. addition, presence both static oscillating fields, necessary condition inducing resonance, show systematically that well-described by $SU(2)$ coherent states, correct magnetization. archived results can be applied diversity experiments such as superfluidity, angular momentum injection pumping spin-transfer torque non-conventional junctions, magnon dissipation, magnetoelectronics