I. Dragieva et al., IMPEDANCE SPECTROSCOPY AND XPS COMPARATIVE INVESTIGATIONS OF THE STATE OF BORON ATOMS IN AN AMORPHOUS METALLIC MATRIX, Journal of solid state chemistry, 133(1), 1997, pp. 273-278
The purpose of this study is to compare the investigations of amorphou
s magnetic ribbons combining the usual structural methods with physica
l impedance spectroscopy (PIS) and X-ray photoelectron spectroscopy (X
PS), The samples are commercially available rapidly quenched ribbons f
or torroidal transformers, Two types of ribbons were thermally treated
below the temperature of amorphous-crystalline phase transition. Two
binding energies of B 1s electrons are determined by XPS in one of the
as-quenched ribbons, which show impedance time constant spectra witho
ut dispersion, The other ribbon, possessing only one value of binding
energy of the B 1s electron (B-I state) in a rapidly as-quenched state
, undergoes transition to a still amorphous state but acquires high el
ectromagnetic losses and show another value of the binding energy of t
he B 1s electron (B-II state) after the heat-treatment procedure, This
latter type of ribbons show structural impedance spectra containing v
arious time constant values. (C) 1997 Academic Press.