Magnetic properties of Fe2O3-Sb2O3-TeO2 glasses

Influence of melting temperature on iron ions behavior in B2O3–BaO–Fe2O3 glasses studied by magnetic susceptibility

“…For higher concentrations of Fe 2 O 3 , these data indicate that the iron ions in the glasses experience negative superexchange interactions and are predominantly antiferromagnetically coupled. Therefore, in the 3B 2 O 3 Á BaO glass matrix, the iron ions behave magnetically similarly as in other oxide glasses [4][5][6][7][8][9]. The increase of melting temperature determines the increase of the disorder in the S2 glasses, which are reflected in appearance by the magnetic superexchange interactions between iron ions at higher Fe 2 O 3 content.…”

“…In this way we consider that in these glasses are presented with both Fe 3+ and Fe 2+ ions. Having in view this supposition and using the atomic magnetic moment values of free Fe 3+ and Fe 2+ ions, we can estimate in first approximation the molar fraction of these ions in the investigated glasses [8]. The results are presented in Tables 1 and 2.…”

Ferroelectricity in the glassy material of the composition Bi2O3–Pb3O4–CuO–K2O

“…(5) becomes negligible [33,34], then the conductivity, , and the pre-exponential factor o in Eq. (5) is expressed by the following equation [28,29]:…”

“…The conduction mechanism in these glasses was understood by the small polaron hopping (SPH) model [33][34][35] based on strong electron-lattice interaction. The experimental results of conductivity and other transport properties of many borate glasses containing transition metal ions supported the SPH model [31][32][33][34][35][36]. At low or intermediate temperatures (below  D /2,  D : the Debye temperature) where polaron binding energy is less than kT (k is the Boltzmann constant and T is the absolute temperature), the threedimensional (3D) variable-range hopping (VRH) [33,36] with T 1/4 dependence of conductivity takes place.…”

Holographic recording in [Sb(PO3)3]n–Sb2O3 glassy films by photoinduced volume and refraction index changes

“…Particularly, antimony oxide glasses were studied because of their more extended infrared transmission [12][13][14] and non-linear optical properties [15,16]. Several works have been also reported on the reversible and irreversible photoinduced effects in amorphous antimony chalcogenide thin films [17][18][19][20].…”