Hydrogen Induced Changes on the Hyperfine Magnetic Field of Amorphous Fe-Ni-Zr Alloys

Ternary alloys, (Fe50−x/2Co50−x/2)Snx(x ≤ 33 at.%), are prepared by mechanical alloying from powder mixtures of the three elements. As-milled alloys are studied by X-ray diffraction and 57Fe and 119Sn Mössbauer spectroscopy. The solubility of Sn in near-equiatomic bcc FeCo is increased from ~0.5 at. % at equilibrium to ~20 at.% in the used milling conditions. The average 119Sn hyperfine magnetic field at room temperature is larger, for any x, than the corresponding fields in mechanically alloyed Fe-Sn solid solutions.

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Determination of the hyperfine magnetic field in magnetic carbon-based materials: DFT calculations and NMR experiments

Scientific Reports ◽

10.1038/srep14761 ◽

2015 ◽

Vol 5 (1) ◽

Cited By ~ 16

Author(s):

Jair C. C. Freitas ◽

Wanderlã L. Scopel ◽

Wendel S. Paz ◽

Leandro V. Bernardes ◽

Francisco E. Cunha-Filho ◽

...

Keyword(s):

Magnetic Field ◽

Dft Calculations ◽

Hyperfine Magnetic Field ◽

Magnetic Carbon ◽

Carbon Based

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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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Elaboration, Structure and Mössbauer Spectroscopy of Nanostructured Fe100−xSix Powders Elaborated by Mechanical Alloying

SPIN ◽

10.1142/s2010324717500023 ◽

2017 ◽

Vol 07 (02) ◽

pp. 1750002 ◽

Cited By ~ 1

Author(s):

M. Hemmous ◽

A. Guittoum

Keyword(s):

Magnetic Field ◽

Solid Solution ◽

Mechanical Alloying ◽

Hyperfine Magnetic Field ◽

Lattice Parameter ◽

X Ray Diffraction ◽

X Ray ◽

Grain Sizes ◽

The Mean ◽

Xrd Studies

We have studied the effect of the silicon concentration on the structural and hyperfine properties of nanostructured Fe[Formula: see text]Six powders ([Formula: see text], 20, 25 and 30[Formula: see text]at.%) prepared by mechanical alloying. The X-ray diffraction (XRD) studies indicated that after 72[Formula: see text]h of milling, the solid solution bcc-[Formula: see text]-Fe(Si) is formed. The grain sizes, [Formula: see text]D[Formula: see text] (nm), decreases with increasing Si concentration and reaches a minimum value of 11[Formula: see text]nm. We have found that the lattice parameter decreases with increasing Si concentration. The changes in values are attributed to the substitutional dissolution of Si in Fe matrix. From the adjustment of Mössbauer spectra, we have shown that the mean hyperfine magnetic field, [Formula: see text]H[Formula: see text] (T), decreases with increasing Si concentration. The substitutional dependence of [Formula: see text]H[Formula: see text] (T) can be attributed to the effect of p electrons Si influencing electrons d of Fe.

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Magnetic field-induced changes in the electronic absorption intensities of NENB

Journal of Magnetism and Magnetic Materials ◽

10.1016/j.jmmm.2003.12.034 ◽

2004 ◽

Vol 272-276 ◽

pp. 968-969

Author(s):

V.C. Long ◽

E.C. Schundler ◽

P.O. Makumbe ◽

X. Wei ◽

C.P. Landee ◽

...

Keyword(s):

Magnetic Field ◽

Electronic Absorption ◽

Induced Changes

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Magnetic-field-induced changes in magnetic shape memory alloys

Materials Science and Engineering A ◽

10.1016/j.msea.2007.01.191 ◽

2008 ◽

Vol 481-482 ◽

pp. 258-261 ◽

Cited By ~ 12

Author(s):

P. Entel ◽

M.E. Gruner ◽

W.A. Adeagbo ◽

A.T. Zayak

Keyword(s):

Magnetic Field ◽

Shape Memory Alloys ◽

Shape Memory ◽

Magnetic Shape Memory ◽

Magnetic Shape Memory Alloys ◽

Induced Changes

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Manganese/Yttrium Codoped Strontium Nanohexaferrites: Evaluation of Magnetic Susceptibility and Mossbauer Spectra

Nanomaterials ◽

10.3390/nano9010024 ◽

2018 ◽

Vol 9 (1) ◽

pp. 24 ◽

Cited By ~ 50

Author(s):

Munirah Almessiere ◽

Yassine Slimani ◽

Hakan Güngüneş ◽

Abdulhadi Baykal ◽

S.V. Trukhanov ◽

...

Keyword(s):

Magnetic Field ◽

Magnetic Properties ◽

Magnetic Susceptibility ◽

Mössbauer Spectra ◽

Ac Susceptibility ◽

Sol Gel ◽

Hyperfine Magnetic Field ◽

Analytical Techniques ◽

Magnetic Interactions ◽

Mossbauer Spectra

Manganese (Mn)- and yttrium (Y)-substituted Sr-nanohexaferrites (MYSNHFs) of composition Sr1−xMnxFe12−xYxO19 (with 0.0 ≤ x ≤ 0.5) were prepared by citrate sol-gel autocombustion method. As-prepared MYSNHFs were characterized via diverse analytical techniques to determine the influence of Mn and Y cosubstitution on their microstructures and magnetic properties. 57Fe Mössbauer spectra of the MYSNHFs were used to evaluate the variation in the line width, isomer shift, quadrupole splitting, and hyperfine magnetic field values. It was shown that the dopant ions could preferentially occupy the 12k, 4f2, and 2b sites. Furthermore, the observed shift in the blocking temperatures of the studied MYSNHFs towards lower values with rising Mn2+ and Y3+ contents was attributed to the overall particles size reduction. Meanwhile, the AC susceptibility of the proposed MYSNHFs revealed that the magnetic interactions were weakened with the increase in dopant contents which was ascribed to the replacement of both Sr2+ and Fe3+ ions by the Mn2+ and Y3+ dopants.

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Pyrochlores. IV. Crystallographic and Mössbauer studies of A2FeSbO7 pyrochlores

Canadian Journal of Chemistry ◽

10.1139/v68-635 ◽

1968 ◽

Vol 46 (24) ◽

pp. 3829-3832 ◽

Cited By ~ 34

Author(s):

Osvald Knop ◽

François Brisse ◽

R. E. Meads ◽

J. Bainbridge

Keyword(s):

Magnetic Field ◽

Oxygen Atom ◽

Isomer Shift ◽

Quadrupole Splitting ◽

High Spin ◽

Room Temperature ◽

Magnetic Order ◽

Standard Procedure ◽

Hyperfine Magnetic Field ◽

Mössbauer Studies

The lattice parameters and the quadrupole splittings of the room-temperature Mössbauer spectra of the cubic A2FeSbO7 pyrochlores (A = Sm, Eu, Gd, Tb, Y, Er, Lu) have been found to vary linearly with the Templeton–Dauben radii of the A3+ ions. The variation of the quadrupole splitting can be correlated with the positional parameter of the majority oxygen atom, x(O2), which determines the degree of distortion of the BO6 octahedron in cubic A2B2O7 pyrochlores. An increase of 0.1 Å in r(A3+) corresponds to a decrease of ca. 0.20 mm/s in the quadrupole splitting in the A2FeSbO7 series, and to an estimated increase of ca. 0.005 in x(O2). The isomer shift and quadrupole splitting at room temperature are typical of Fe3+(high spin) in octahedral coordination of relatively high distortion. Y2FeSbO7 at 4.2°K was found to exhibit magnetic order with a hyperfine magnetic field of approximately 400 kOe. An attempt to prepare a cubic La2FeSbO7, pyrochlore by the standard procedure was not successful.

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