Magnetic Field Distribution Analysis of the Broadened Mössbauer Spectra of Zinc Ferrite

Abstract

I n some magnetically ordered compounds, broadened Mossbauer spectra are interpreted as arising from hyperfine field (H,) distributions. These distributions measured at several temperatures are used to determine both a possible distribution of transition temperatures in the sample aa well as the set of curves of H, as a function of temperature. The method of calculation is applied to ZnFe,O,. Les spectres Mossbauer Blargis de certains mrnpos& magnbtiquea peuvent traduire des distributions du champ megnbtique interne ( H J . Ayant d6termin6 les distributions deIf, diffhrentes tempbratures, il est possible d'en dbduire ir la fois une 6ventuelle distribution de la tempbrature de transition ( TN) dens 1'6chantillon e t le r6seau des courbes donnant 1'6volution thermique de H,. Kous avons applique la m6thode B l'btude de ZnF%O,.

Influence of silicon and cobalt substitutions on magnetostriction coefficient of cobalt ferrite

“…Then, the spectra were recorded at 4 K again with 5 T applied field. Now, there is evidence that the recoilless fractions for ions on A-and B-sites are equal, and thus no error is introduced on this account [6]. The absence of second and fifth lines ( m = 0) in the 4 K spectra (Fig.…”

Mecanosynthesis of partially inverted zinc ferrite

“…When it is obtained by solid-state reaction, ZnFe 2 O 4 has a normal spinel structure in which Zn 2+ cations occupy tetrahedral (A) sites, while all the Fe 3+ cations occupy octahedral (B) sites. At room temperature, the Mössbauer spectrum is characterized by a paramagnetic doublet [25], while at 4 K it is a well-defined sextet [26]. If some Fe 3+ cations occupy partially the A sites, at 4 K the Mössbauer spectrum is constituted by two sextets which strongly overlap.…”

Automation in M�ssbauer spectroscopy data analysis

“…The use of hyperfine parameter distribution (Figure 10) in Mö ssbauer spectroscopy was proposed in 1971 by Varret et al [41] and Widrow [42], giving the first two algorithms for the deconvolution problem. An extensive review on the evaluation of distributed Mö ssbauer parameters has been communicated by Campbell and Aubertin [43] and other workers [44][45][46][47].…”