Electron spin resonance of palladium-related defect in silicon

A different Pd-related defect from a substitutional Pd with (C2v) symmetry was detected by ESR measurement. New ESR signal of the Pd-related defect showed different g-value and symmetry from those of the substitutional Pd. The Pd-related defect has anisotropic character of monoclinic (C1h) symmetry. The calculated g-values are g1=1.97, g2=2.03, g3=2.16, and the g1 axis is along <1 1 0> direction. The g2 and g3 axes are perpendicular to the g1 axis, and the g2 axis is rotated from <1 0 0> to <1 1 1> direction at the angle of 51 deg. In addition to the Pd-related defect, we have found other ESR signals in Pd and hydrogen-diffused Si. The ESR signals showed the hyperfine structure of hydrogen. Therefore, it is though that the ESR signals are originated from Pd-H complex defect.