Af. Mukhamedgalieva et al., CHANGES IN THE VALENCE STATE OF IRON AND MAGNETIZATION OF FERRUGINOUSQUARTZITE IRRADIATED BY CO2-LASER LIGHT, High energy chemistry, 28(4), 1994, pp. 329-331
The changes in the valence state of iron and the magnetization of ferr
uginous quartzite irradiated by CO2-laser light were studied; the inci
dent power density was 10(4) - 10(5) W/cm2. It was established that th
e specific saturation magnetization decreased with increasing irradiat
ion intensity; it was also found that this decrease is due to the crys
tal lattice structure changes that cause a decrease in the fraction of
iron ions in ferromagnetic state and an increase in the fraction of i
ron ions in the paramagnetic state with their partial reduction.