Journal ArticleDOI
Mössbauer studies of the magnetic behavior of amorphous Mn x Sn1−x alloys
TLDR
In this article, low temperature in situ119Sn Mossbauer effect (ME) studies in vapor quenched amorphous MnxSn1−x (0.09 <x <0.95) alloys between 150 and 4.2 K were presented.Abstract:
We present systematic low temperature in situ119Sn Mossbauer effect (ME) studies in vapor quenched amorphous MnxSn1−x (0.09<x<0.95) alloys between 150 and 4.2 K. It is shown that the magnetic behavior of the system is correctly displayed by the transferred magnetic hyperfine (hf) interactions detected at the119Sn site. Combining the results of the concentration dependence of the transferred magnetic hf field and the ordering temperature with recent ac-magnetic susceptibility data reported on this system, a complete magnetic phase diagram is proposed. The effect of an external magnetic field (up to about 3 T) on the spin correlations in the spin-glass state is also discussed.read more
Citations
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Vapor quenched Ag1-xFex alloys : in situ Mössbauer studies
TL;DR: In this article, in situ Mossbauer measurements on Ag-Fe films and occurence of aging effects were obtained at 5.5 K. The results for composition dependence of lattice parameters and average hyperfine fields were compared with values reported in the literature for films prepared in different conditions.
Journal ArticleDOI
Relaxation and spin correlations in 119Sn‐doped a‐Fe90Sc10
D. Wiarda,D. H. Ryan +1 more
Abstract: Combined 119Sn and 57Fe Mossbauer measurements have been made on a Sn‐doped sample of a‐Fe‐Sc both around Tsg (117±2 K) to examine the onset of order, and at 12 K to investigate spin correlations. The different time scales probed by the Sn and Fe Mossbauer transitions allow us to confirm that cluster relaxation effects do not contribute to the ordering at Tsg, while the large transferred hyperfine field (Bhf) at the Sn sites, in an alloy known to exhibit isotropic spin freezing, is inconsistent with the simple view of the transferred field arising as a vector sum over the nearest‐neighbor moments.
Journal ArticleDOI
Pb1−x Fe x films prepared by vapor condensation
TL;DR: In this article, the vapor condensation technique was used to prepare films of Pb1−xFex (0.10≤x≤0.74) deposited onto a kapton substrate at temperatures (Ts) of 20, 200 and 300 K. In situFe Mossbauer measurements were performed to study the solubility of the Fe-Pb binary system.
References
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Journal ArticleDOI
Hyperfine field distributions from Mossbauer spectra
TL;DR: In this article, a simple procedure for obtaining the distributions of magnetic hyperfine fields from Mossbauer spectra is outlined, based on which a simple algorithm is proposed to obtain the distribution of hyperfine magnetic fields from the spectra.
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119 Sn hyperfine fields in MnSn 2
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Mössbauer effect of 119 Sn in amorphous superconducting metals
TL;DR: In this article, the Debye-Waller Factor (DWF) obtained from the spectra is identical for the crystalline and for the disordered phase, but the DWF of the amorphous phase is smaller than the DWFs of the crystaline phase athigh temperatures, but it shows a stronger temperature dependence, reaching the latter one at about 4 K. From this low-temperature result, the differences of the Eliashberg function and of the superconducting transition temperature in these two phases cannot be related to changes in the phonon spectrumF(ω),
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Internal Magnetic Fields in Manganese-Tin Alloys
TL;DR: In this article, the tin sites in two manganese-tin alloys have been studied as a function of temperature to above the Curie points, and a possible quadrupole interaction of about 27 Mc/sec was observed in the case of the pure ferromagnetic transition elements.
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Magnetic behavior of Fe x Sn 1 − x amorphous alloys near the critical composition
TL;DR: In this paper, a multicritical magnetic phase diagram with paramagnetic, ferromagnetic, and spin-glass-like phases is proposed, and high-field magnetization measured up to 150 kOe strongly suggests that local anisotropy, randomly oriented through the material, might successfully compete with exchange interactions for some of the iron clusters.