title: Rotational properties of ferromagnetic nanoparticles driven by a precessing magnetic field in a viscous fluid.
abstract: We study the deterministic and stochastic rotational dynamics of ferromagnetic nanoparticles in a precessing magnetic field. Our approach is based on the system of effective Langevin equations and on the corresponding Fokker-Planck equation. Two key characteristics of the rotational dynamics, namely the average angular frequency of precession of nanoparticles and their average magnetization, are of interest. Using the Langevin and Fokker-Planck equations, we calculate both analytically and numerically these characteristics in the deterministic and stochastic cases, determine their dependence on the model parameters, and analyze in detail the role of thermal fluctuations.
authors.affiliation: Sumy State University, 2 Rimsky-Korsakov Street, UA-40007 Sumy, Ukraine.
authors.forename: T V
authors.initials: TV
authors.lastname: Lyutyy
authors.affiliation: Sumy State University, 2 Rimsky-Korsakov Street, UA-40007 Sumy, Ukraine.
authors.forename: S I
authors.initials: SI
authors.lastname: Denisov
authors.affiliation: Sumy State University, 2 Rimsky-Korsakov Street, UA-40007 Sumy, Ukraine.|NanoBioMedical Center, Adam Mickiewicz University, Umultowska 85, PL-61-614 Poznań, Poland.
authors.forename: V V
authors.initials: VV
authors.lastname: Reva
authors.affiliation: Sumy State University, 2 Rimsky-Korsakov Street, UA-40007 Sumy, Ukraine.
authors.forename: Yu S
authors.initials: YS
authors.lastname: Bystrik
mesh_terms: D016880:Anisotropy; D060526:Magnetic Fields; D059346:Magnets / Q000737:chemistry*; D008962:Models, Theoretical; D053758:Nanoparticles; D012399:Rotation; D013269:Stochastic Processes; D013696:Temperature; D014783:Viscosity