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Concentration Dependence of Room Temperature Magnetic Ordering in Dilute Fe: Ge1 − x Te x Alloy

“…Figure 2 illustrates the singlet state for x = 0. The isomer shift evaluated is 0.31 mm/s, which agrees quite well with the earlier reported value of FeGe 2 phase [11]. While the FeGe 2 phase is antiferromagnetic below room temperature, it shows a paramagnetic behavior at 300 K and appears to be singlet in 57 Fe Mossbauer spectra.…”

Structure, hyperfine interactions and magnetization studies of mechanically alloyed Fe50Ge50 and Fe62Ge38

“…This phase was present in the samples milled for 5 and 10 h, too. The obtained value of δ agrees very well with the data obtained for nanocrystalline Fe 33 Ge 67 alloy prepared by mechanical alloying (δ = 0.316 mm s −1 ) [8]. The value of δ for the paramagnetic component changed to 0.44 mm s −1 for the samples milled for 20, 50 and 100 h and this component originates from the cubic FeGe (B20) phase, as suggested by the XRD data.…”

“…The structure of the steady state products in the Fe-Ge system obtained by mechanical alloying has been determined by Kwon et al in a broad range of concentrations (up to 67 at.% Ge) [6]. Hyperfine interactions in ball-milled Fe-Ge alloys with the 9-40 at.% Ge content have been investigated by Cabrera and Sanchez [7] and in Fe 33 Ge 67 alloy by De Lima et al [8].…”

Thermal stability and hyperfine interactions of mechanically alloyed Fe–Ge phases

“…This iron oxide is in nonmagnetic state because in the Mössbauer spectrum there are no sextets with characteristic hyperfine magnetic fields (about 50 and 48 T [11]). The doublet with the high value of the quadrupole splitting was attributed to the iron oxide, in which Fe ions are probable in Fe 2+ oxidation state ( [5] and reference therein).…”

“…Moreover, a very few papers concerning hyperfine interactions in the mechanically alloyed Fe-Ge phases have appeared in the modern literature [2][3][4][5][6][7].…”