Magnetic behaviour of xNd2O3 (1−x) PbB4O7 glasses

Magnetic behaviour of x Nd 2 O 3 (1 − x )[0.95Na 2 B 4 O 7 ·0.05PbO] glasses

“…The obtained µ values belong to the 3.20-3.47µ B range, where µ B is the Bohr magneton. Note that these values are relatively close to but somewhat smaller than the magnetic moment of the free Nd 3+ ion, 3.68µ B [13]. This behaviour is in agreement with the assumption of weak antiferromagnetic interactions between the Nd 3+ ions.…”

“…We note important differences in the compositional dependence of θ p (representative for the compositional evolution of the amount of coupled Nd 3+ ions) for the xNBP and [13,14]. Thus, the authors of [13] reported |θ p | values of zero for x ≤ 0.15, followed by a linear increase with respect to x up to |θ p | ≈ 30 K, for 0.15 < x ≤ 0.50, while the author of [14] observed a relatively constant |θ p | of ≈ 41 K for all the investigated compositional range (0.05 ≤ x ≤ 0.23). Figure 2 shows for the xNBP glasses a compositional dependence of |θ p | which is intermediary between the two limits represented by the data reported by the authors of [13] and [14].…”

“…Thus, the authors of [13] reported |θ p | values of zero for x ≤ 0.15, followed by a linear increase with respect to x up to |θ p | ≈ 30 K, for 0.15 < x ≤ 0.50, while the author of [14] observed a relatively constant |θ p | of ≈ 41 K for all the investigated compositional range (0.05 ≤ x ≤ 0.23). Figure 2 shows for the xNBP glasses a compositional dependence of |θ p | which is intermediary between the two limits represented by the data reported by the authors of [13] and [14]. It is reasonable to consider that the differences in the compositional behaviour of θ p are due to differences in the "thermal history" of the analysed glass systems.…”

“…Thus, neodymium was the active ion in the first glass laser and in the first fiber amplifier [1]. Studies concerning glasses with other rare-earth ions such as gadolinium, holmium and europium were also reported (i.e., [7][8][9][10][11][12][13][14]).…”

“…Relatively few and sometimes contradictory data concerning the magnetic behaviour of glasses containing neodymium ions is available. Thus, the magnetic behaviour of xNd 2 O 3 (1 − x)PbB 4 O 7 glasses with 0.01 < x ≤ 0.50 and 0.05 ≤ x ≤ 0.23 was studied by Ardelean et al [13] and Valente [14]. These authors report appreciable differences concerning the technologically important neodymium ion concentration at which coupled Nd 3+ ion species occur in the glass matrix.…”