Spin dynamics of paramagnetic centers with anisotropic g tensor and spin of 1/2.

ABSTRACT: The influence of g tensor anisotropy on spin dynamics of paramagnetic centers having real or effective spin of 1/2 is studied. The g anisotropy affects both the excitation and the detection of EPR signals, producing noticeable differences between conventional continuous-wave (cw) EPR and pulsed EPR spectra. The magnitudes and directions of the spin and magnetic moment vectors are generally not proportional to each other, but are related to each other through the g tensor. The equilibrium magnetic moment direction is generally parallel to neither the magnetic field nor the spin quantization axis due to the g anisotropy. After excitation with short microwave pulses, the spin vector precesses around its quantization axis, in a plane that is generally not perpendicular to the applied magnetic

SUBMITTER: Maryasov AG 

PROVIDER: S-EPMC3418606 | biostudies-literature | 2012 Aug

REPOSITORIES: biostudies-literature