3 edition of A Mössbauer study of single-crystal Zr-0.065 at % @@Fe found in the catalog.
A Mössbauer study of single-crystal Zr-0.065 at % @@Fe
by Reactor Materials Research Branch, Chalk River Laboratories in Chalk River, Ont
Written in English
|Other titles||Analyse Mössbauer du Zr monocristallin à 0,065 % (Atomique) de @@Fe.|
|Statement||by J.A. Sawicki ... [et al.].|
|Series||AECL research -- 11126, AECL research (Series) -- 11126.|
|Contributions||Sawicki, J. A., Chalk River Laboratories. Reactor Materials Research Branch., AECL Research.|
|LC Classifications||TN799.Z5 M67 1994|
|The Physical Object|
|Pagination||9 p. :|
Four 57 Fe-labeled tetrachloroferrates(III) of organic cations (1-butylmethylimidazolium, 1-allylmethylimidazolium, 1-methylpropylpyrrolidinium, tetraphenylphosphonium) were examined by temperature-dependent Mössbauer spectroscopy. The hyperfine and dynamic parameters of the iron(III) site were determined. Single crystal X-ray diffraction data of [Ph 4 P][FeCl 4] were collected at. Four 57 Fe-labeled tetrachloroferrates(III) of organic cations (1-butylmethyl-imidazolium, 1-allylmethylimidazolium, 1-methylpropylpyrrolidinium, tetraphenylphosphonium) were examined by temperature-dependent Mössbauer spectroscopy. The hyperfine and dynamic parameters of the iron(III) site were determined. Single crystal X-ray diffraction data of [Ph 4 P][FeCl 4] were collected at.
Proceedings of the 31st International Conference on the Applications of the Mössbauer Effect (ICAME ) held in Kobe, Japan, September , Y. Yoshida (Ed) Professor Rudolf L. Mössbauer passed away just before this conference on 14 September At . Synthetic samples with different chemical compositions along the hedenbergite–aegirine (CaFe 2+ Si 2 O 6 –NaFe 3+ Si 2 O 6) solid-solution series have been investigated by single-crystal X-ray diffraction and 57 Fe Mössbauer spectroscopy. All compounds show C2/c symmetry, both at K and at low temperature ( K). The structural changes within the hedenbergite–aegirine series are.
57 Fe Mössbauer spectroscopic study of zinc showed that the samples were in a single crystal phase, except that a little bit of the crystal phase of Fe appeared for the samples calcined at a. deconvoluted each Mössbauer spectrum by pro ﬁle ﬁtting with a set of Lorentzian functions. As a result, we found signals associated with only two iron oxidation states, Fe(II) and Fe(III), in all of the spectra. The Mössbauer spectra for the REE ore samples, along with their deconvoluted Fe(II) and Fe(III) proﬁles, are shown in Figure 3.
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Single crystals of Zr at% Fe (95% 57 Fe), from a common parent, have been studied by Mössbauer spectroscopy, using both transmission and conversion-electron modes. In the “as grown” state the Fe is present as the meta-stable phase, t-Zr 2 Fe. Vacuum annealing, in the range – K, results in gradual decomposition of t-Zr 2 Fe and the diffusion of Fe from the bulk to the Cited by: 8.
Get this from a library. A Mössbauer study of single-crystal Zr at % ⁵⁷Fe. [J A Sawicki; Chalk River Nuclear Laboratories. Reactor Materials Research Branch.]. The Mössbauer effect as generally applied to the study of minerals relies on the fact that 57 Fe, which is a decay product of 57 Co, is unstable.
57 Fe decays by giving off a gamma ray (γ-ray), along with other types of 1 shows the nuclear decay scheme for 57 Co → 57 Fe and various backscattering processes for 57 Fe that can follow resonant absorption of an incident gamma. Mössbauer studies of single crystal Pr1/3Sr2/3FeO3 In this study, the CO at x=2/3 disappeared in the case of R=Sm.
which suggests that the superexchange interaction for Gd-Fe-O-Fe is. Outline of 57 Fe synchrotron radiation Mössbauer source. (A) Conceptual diagram of energy domain Mössbauer spectroscopy using a Doppler shifted 57 Fe-SR-Mössbauer radiation.
(B) Light oven for heating an oscillated 57 FeBO 3 single crystal to near the Néel temperature. (C) External view of the high-precision diffractometer. Single-crystal Mössbauer spectroscopy is used to study magnetic structure of Sr 2 Fe 2 O 5.
• Complete Hamiltonian for hyperfine interactions in excited and ground states was solved. • Fe 3+ magnetic moments are parallel to the shortest crystallographic axis c. • The orientation of nuclear electric field gradient is similar to that in Ca. In this first single-crystal Mössbauer study of mica we have measured the room-temperature spectra for different orientations (with respect to the -γ-ray flux) of a well-characterized monocrystalline wafer of natural phlogopite.
We apply a new method (D. Rancourt, Nucl. Instrum. The Mössbauer study showed that iron ions in both samples were in Fe 3+ state. About 10% of Fe 3+ ions in HoFe Sc O 3 were found to be in local environment with the coordination number 4. Collecting Mössbauer spectra in the temperature range of 14–K allowed estimating magnetic phase transition temperatures (T M) for HoFeO 3 and.
Polycrystalline,, and single crystal, YIG samples have been thoroughly investigated over the past six decades with Mössbauer spectroscopy, and these data are used as the basis of this comparative study of sample-A and sample-B. Fig. 1, Fig. 2 show Mössbauer spectra (MS) for both samples, collected at RT (T = to K), K and K.
The kinetic origin of the hysteresis loop was demonstrated in temperature rate dependent magnetic measurements. Spin transition in the α-form is accompanied by symmetry breaking from a single Fe(II) site in the HS state to two distinct Fe(II) sites in the low spin (LS) state.
In the β-form, the single crystal XRD has revealed a re-entrant. However, the metrical parameters at 30 K are clearly more consistent with the IS state, while the high temperature structure at K lies closer to the HS state.
As observed in the VT single crystal structure study, the Fe–P increases from IS to HS, contrary to the Fe–Cl distance (Table 1).
For the IS structure, the optimized geometry. “A study of metastable phases in the Fe - Zr system after laser irradiation with the help of Mössbauer spectroscopy,” Metallofizika, 6(6), – (). Google Scholar Mössbauer spectra of 57 Fe in a single-crystal YbFe 2 O 4, an antiferromagnetic Ising spin system on a triangular lattice, were measured below the Neel temperature, T ost groups of absorption spectra, those due to Fe ions in a 3+-like state, were investigated extensively as a function of the external magnetic field during measurement (H meas) as well as that during cooling (H.
The assignment of iron absorption doublets and their Mössbauer parameters are discussed in terms of the single crystal structure data of one of the samples studied in this work. Cation distributions are also given.
The occupancies of cations at the tetrahedral (Z) site are Fe 3+ >Al 3+, Ti 4+, and the relative enrichments at Z site are always.
Single‐phase, single‐crystal Fe 16 N 2 () films and Fe‐11 at. %N martensite films of – Å thickness have been epitaxially grown on In Ga As() substrates by evaporating Fe in an atmosphere of mixed gas of N 2 and NH 3, followed by annealing. The saturation magnetizations 4πM s ’s for Fe 16 N 2 and Fe‐N martensite films have been measured to be around 29 and The reaction between N-methydiethanolamine (mdeaH2), benzoic acid, FeCl3, and DyCl3 yields a decanuclear coordination cluster, [Dy3Fe7(μ4-O)2(μ3-OH)2(mdea)7(μ-benzoate)4(N3)6]2H2O7CH3OH (1) whose single crystal structure exhibits three and seven crystallographically distinct Dy(III) and Fe(III) ions; six of the Fe(III) ions are pseudo-octahedrally coordinated, whereas the seventh has a.
Mössbauer spectrometry provides unique measurements of electronic, magnetic, and structural properties within materials. A Mössbauer spectrum is an intensity of γ-ray absorption versus energy for a specific resonant nucleus such as 57Fe or Sn. Mössbauer.
An 57 Fe Mössbauer spectroscopic study has been conducted on the single-crystal NdFe 3 (BO 3) 4 to investigate its magnetic structure and multiferroicity. In the multiferroic state below the Néel temperature T N = 29 K, the magnitude of the quadrupole coupling constant e 2 qQ/2 becomes smaller than that in the paramagnetic phase.
The decrease is explained by the spin–orbit coupling due to. Mössbauer spectra of the low temperature phase of single crystal magnetite were measured with a magnetic field along various directions in (1 \bar10) plane after cooled in the magnetic field along .
Measured spectra were found to be sensitive to the direction of the applied magnetic field. The metal complexes, [M(Hdammthiol) 2]Cl3H 2 O [M = Cr(III) (1), Fe(III) (2)] [where H 2 dammthiol is the thiol form of the ligand, diacetylmonoxime morpholine N-thiohydrazone] were synthesized by metal template reactions of diacetylemonoxime with morpholineN-thiohydrazide in the presence of CrCl 3 6H 2 O and FeCl 3 6H 2 O.
Both the complexes (1 and 2) were characterized by single. Recently, the iron containing langasite-type crystal Ba3NbFe3Si2O14 has attracted great attention as a new magnetically induced multiferroic. In this work, magnetic, structural and electronic properties of the multiferroic Ba3NbFe3Si2O14 were investigated by several methods, including synchrotron X-ray diffraction, Raman spectroscopy and synchrotron Mössbauer source technique at high.
1. Introduction. Mössbauer spectroscopy 1−4 (MS, and its synchrotron derivatives 5,6) is a very powerful experimental tool in different fields of chemistry, material science, and physics, as this technique can obtain invaluable information on the local electronic structure, symmetry, and magnetic gh it can be applied to more than 40 kinds of nuclide, the properties of 57 Fe.In order to clarify the complex Fe distribution evidenced by Baldi et al.
[Proc. CIMTEC ()], a 57Fe Mössbauer and diffuse reflectance spectroscopy study has been undertaken. Fe was found.