Study of Magnetic Properties of Fe100-xNix Nanostructures Using the Mössbauer Spectroscopy Method

Hyperfine interactions of 57Fe nuclei in Fe100-xNix nanostructures synthesized in polymer ion-track membranes were studied by Mössbauer spectroscopy. The main part of obtained nanostructures was Fe100-xNix nanotubes with bcc structure for 0 ≤ x ≤ 40, and with fcc structure for 50 ≤ x ≤ 90. The length, outside diameter and wall thickness of nanotubes were 12 μm, 400 ± 10 nm and 120 ± 5 nm respectively. For the studied nanotubes a magnetic texture is observedalong their axis. The average value of the angle between the direction of the Fe atom magnetic moment and the nanotubes axis decreases with increasing of Ni concentration for nanotubes with bcc structure from ~50° to ~40°, and with fcc structure from ~55° to ~46°. The concentration dependences of the hyperfine parameters of nanotubes Mössbauer spectra are qualitatively consistent with the data for bulk polycrystalline samples. With Ni concentration increasing the average value of the hyperfine magnetic field increases from ~328 kOe to ~335 kOe for the bcc structure and drops to ~303 kOe in the transition to the fcc structure and then decreases to ~290 kOe at x = 90. Replacing the Fe atom with the Ni atom in the nearest environment of Fe atom within nanotubes with bcc structure lead to an increase in the hyperfine magnetic field by “6–9 kOe”, and in tubes with fcc structure—to a decrease in the hyperfine magnetic field by “11–16 kOe”. The changes of the quadrupole shift and hyperfine magnetic field are linearly correlated with the coefficient −(15 ± 5)·10−4 mm/s/kOe.

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Microstructure Evolution and Mossbauer Spectroscopy Research of Nanostructured Ni3 Fe Intermetallic

Journal of Metastable and Nanocrystalline Materials ◽

10.4028/www.scientific.net/jmnm.32.1 ◽

2021 ◽

Vol 32 ◽

pp. 1-13

Author(s):

Amel Kaibi ◽

Abderrahim Guittoum ◽

Nassim Souami ◽

Mohamed Kechouane

Keyword(s):

Magnetic Field ◽

Mössbauer Spectroscopy ◽

Mössbauer Spectra ◽

Milling Time ◽

Mossbauer Spectroscopy ◽

Hyperfine Magnetic Field ◽

X Ray Diffraction ◽

X Ray ◽

Mossbauer Spectra ◽

Mößbauer Spectroscopy

Nanocrystalline Ni75Fe25 (Ni3Fe) powders were prepared by mechanical alloying process using a vario-planetary high-energy ball mill. The intermetallic Ni3Fe formation and different physical properties were investigated, as a function of milling time, t, (in the range 6 to 96 h range), using X-Ray Diffraction (XRD) and Mössbauer Spectroscopy techniques. X-ray diffraction were performed on the samples to understand the structural characteristics and get information about elements and phases present in the powder after different time of milling. The refinement of XRD spectra revealed the complete formation of fcc Ni (Fe) disordered solid solution after 24 h of milling time, the Fe and Ni elemental distributions are closely correlated. With increasing the milling time, the lattice parameter increases and the grains size decreases. The Mössbauer experiments were performed on the powders in order to follow the formation of Ni3Fe compound as a function of milling time. From the adjustment of Mössbauer spectra, we extracted the hyperfine parameters. The evolution of hyperfine magnetic field shows that the magnetic disordered Ni3Fe phase starts to form from 6 h of milling time and grow in intensity with milling time. For the milling time more than 24 h, only the Ni3Fe disordered phase is present with a mean hyperfine magnetic field of about 29.5 T. The interpretation of the Mossbauer spectra confirmed the results obtained by XRD.

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Mean hyperfine fields at 57Fe in dilute iron-based alloys studied by Mössbauer spectroscopy

Nukleonika ◽

10.1515/nuka-2015-0010 ◽

2015 ◽

Vol 60 (1) ◽

pp. 39-42 ◽

Cited By ~ 1

Author(s):

Rafał Idczak ◽

Robert Konieczny ◽

Jan Chojcan

Keyword(s):

Magnetic Field ◽

Mössbauer Spectroscopy ◽

Solid Solutions ◽

Room Temperature ◽

Mossbauer Spectroscopy ◽

Hyperfine Magnetic Field ◽

Hyperfine Fields ◽

Mößbauer Spectroscopy ◽

The Mean ◽

Iron Based

Abstract The room temperature Mössbauer spectra of 57Fe were measured for numerous dilute iron-based alloys Fe1−xDx (D = Al, Co, Cr, Mn, Mo, Ni, Os, Pt, Re, Ru, Ta, Ti, V, W, Zn), annealed at 1270 K for 2 h before the measurements. The spectra were analyzed using the Hesse–Rübartsch method in order to determine the mean hyperfine magnetic field <B> at the 57Fe nuclei as a function of concentration x of the minority component of the alloy. As the binary alloys are one-faze solid solutions of an element D in iron, a linear relationship between <B> and x is observed. The result supports the suggestion that Mössbauer spectroscopy is a useful tool for the study of dissolution of different elements in iron.

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Studies about the design of magnetic bionanocomposite

Physical Sciences Reviews ◽

10.1515/psr-2019-0122 ◽

2020 ◽

Vol 0 (0) ◽

Author(s):

Robert Müller ◽

Janna Kuchinka ◽

Thomas Heinze

Keyword(s):

Magnetic Field ◽

Drug Delivery ◽

Mössbauer Spectroscopy ◽

Fatty Acid ◽

Optical Microscopy ◽

High Frequency ◽

Mossbauer Spectroscopy ◽

Fatty Acid Esters ◽

Iron Oxide Particles ◽

Mößbauer Spectroscopy

Abstract Magnetic nanocomposites are a class of smart materials that have attracted recent interest as drug delivery systems or as medical implants. A new approach toward the biocompatible nanocomposites suitable for remote melting is presented. It is shown that magnetite nanoparticles (MNPs) can be embedded into a matrix of biocompatible thermoplastic dextran esters. For that purpose, fatty acid esters of dextran with adjustable melting points in the range of 30–140 °C were synthesized. Esterification of the polysaccharide by activation of the acid as iminium chlorides guaranteed mild reaction conditions leading to high-quality products as confirmed by Fourier-transform infrared (FTIR) and nuclear magnetic resonance (NMR) spectroscopy as well as by gel permeation chromatography (GPC). A method for the preparation of magnetically responsive bionanocomposites (BNCs) was developed consisting of combined dissolution/suspension of the dextran ester and hydrophobized MNPs in an organic solvent followed by homogenization with ultrasonication, casting of the solution, drying and melting of the composite for a defined shaping. This process leads to a uniform distribution of MNPs in BNC as revealed by scanning electron microscope (SEM). Samples of different geometries were exposed to high-frequency alternating magnetic field (AMF). It could be shown that defined remote melting of such biocompatible nanocomposites is possible for the first time. This may lead to a new class of magnetic remote-control systems, which are suitable for controlled release applications or self-healing materials. BNCs containing biocompatible dextran fatty acid ester melting close to human body temperature were prepared and loaded with Rhodamine B (RhB) or green fluorescent protein (GFP) as model drugs to evaluate their potential use as drug delivery system. The release of the model drugs from the magnetic BNC investigated under the influence of a high-frequency AMF (20 kA/m at 400 kHz) showed that on-demand release is realized by applying the external AMF. The BNC possessed a long-term stability (28 d) of the incorporated iron oxide particles after incubation in artificial body fluids. Temperature-dependent mobility investigations of MNP in the molten BNC were carried out by optical microscopy, magnetometry, alternating current (AC) susceptibility, and Mössbauer spectroscopy measurements. Optical microscopy shows a movement of agglomerates and texturing in the micrometer scale, whereas AC susceptometry and Mössbauer spectroscopy investigations reveal that the particles perform diffusive Brownian motion in the liquid polymer melt as separated particles rather than as large agglomerates. Furthermore, a texturing of MNP in the polymer matrix by a static magnetic field gradient was investigated. First results on the preparation of cross-linkable dextran esters are shown. Cross-linking after irradiation of the BNC prevents melting that can be used to influence texturing procedures.

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Study of hyperfine interactions in carbonaceous chondrite Isheyevo (CH/CB) using Mössbauer spectroscopy with high velocity resolution

Hyperfine Interactions ◽

10.1007/s10751-008-9655-3 ◽

2007 ◽

Vol 177 (1-3) ◽

pp. 73-79 ◽

Cited By ~ 1

Author(s):

M. I. Oshtrakh ◽

V. I. Grokhovsky ◽

K. A. Uymina ◽

V. A. Semionkin

Keyword(s):

Mössbauer Spectroscopy ◽

High Velocity ◽

Mossbauer Spectroscopy ◽

Carbonaceous Chondrite ◽

Hyperfine Interactions ◽

High Velocity Resolution ◽

Mößbauer Spectroscopy

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Applications of 61Ni Mössbauer spectroscopy

Canadian Journal of Physics ◽

10.1139/p87-204 ◽

1987 ◽

Vol 65 (10) ◽

pp. 1294-1300 ◽

Cited By ~ 4

Author(s):

C. A. McCammon

Keyword(s):

Mössbauer Spectroscopy ◽

Experimental Method ◽

Mossbauer Spectroscopy ◽

Hyperfine Interactions ◽

Electronic Transitions ◽

Spin Structures ◽

Mössbauer Studies ◽

Mößbauer Spectroscopy

The number of 61Ni Mössbauer studies, although small, indicates that definitive measurements are possible once experimental obstacles have been overcome. The experimental method and hyperfine interactions in 61Ni are discussed briefly, followed by a review of results obtained from 61Ni Mössbauer experiments during the last 10 years. The results are discussed in relation to the determination of spin structures, the study of electronic transitions, and the study of hyperfine interactions.

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