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Some radiopulsars have anomalous braking index values . It is shown that such anomalous values may be related to nondipolar magnetic field. Precession of a neutron star leads to rotation (in the reference frame of the star) of its angular velocity    Ω    around the direction of neutron star magnetic dipole   m   with an angular velocity    Ω    p   . This process may cause altering of electric current flowing through the inner gap and consequently the current losses on the time‐scale of precession period   T p  = 2π/Ω  p   . It occurs because the electric current in the inner gap is determined by Goldreich‐Julian charge density  ρ  GJ  =−  Ω  ·  B  /(2π c ) , that depends on the angle between direction of small scale magnetic field and the angular velocity    Ω   .

The influence of nondipolar magnetic field and neutron star precession on braking indices of radiopulsars