Evidence of Dipolar Magnetic Interaction in Melted Fe50Al50 Samples

Rodríguez, H. Bustos; Lozano, D. Oyola; Martínez, Y. A. Rojas; Hernandez, J. S. Trujillo; Alcázar, G. A. Pérez

doi:10.1007/s10948-016-3429-y

Cited by 5 publications

(7 citation statements)

References 25 publications

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“…After fitting, a mean hyperfine field of 318 kOe is obtained which is smaller than the field of pure Fe as a consequence of the substitution of Fe by Al atoms. These results are similar to those reported by other authors [ 13 ].…”

Section: Resultssupporting

confidence: 93%

“…Figure 1 shows the X-ray diffraction patterns of the Fe 90 Al 10 arc furnace melt powders, sintered at 1000 °C for 7 days, and subsequently mechanically alloyed with oleic acid as a surfactant for 24 and 48 h. Here, we can observe that for the three diffractograms, there is only the presence of the phase corresponding to the Fe 90 Al 10 system, with a BCC (cubic) structure and lattice parameter of (2.88 Å) [ 13 , 14 , 15 ]. This is a consequence of the effect of the milling time by not promoting secondary phases.…”

Section: Resultsmentioning

confidence: 99%

“…Figure 3 shows the Mössbauer spectra and the hyperfine field probability distributions of the arc furnace powders of the Fe 90 Al 10 system, sintered at 1000 °C for 7 days. The Mössbauer spectra were fitted with one component (sextet) associated with the Fe 90 Al 10 system, indicating a ferromagnetic behavior which presents a disorderly character given by the half-width of the line due to the reduction of the particle size by the milling process [ 13 , 15 ]. This is a consequence of the high content of Fe in the sample and the thermal treatment carried out on it at 1000 °C followed by quenching in ice water, and this treatment retains the high-temperature disordered structure.…”

Section: Resultsmentioning

confidence: 99%

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Production and Characterization of Nanostructured Powders of Nd2Fe14B and Fe90Al10 by Mechanical Alloying

et al. 2022

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The objective of this work is to evaluate the applicability of exchange coupling between nanoparticles of Nd2Fe14B (hard magnetic material) and Fe90Al10 (soft magnetic material), as permanent magnets produced by surfactant-assisted mechanical alloying. The obtained powders were then mixed with 85% of the Nd2Fe14B system and 15% of the Fe90Al10 system and subsequently sintered at 300 °C, 400 °C and 500 °C for one hour. The results obtained by Mössbauer spectrometry (MS) show a ferromagnetic behavior with six magnetic sites represented by sextets (16k1, 16k2, 8j1, 8j2, 4c and 4e), characteristic of the Nd2Fe14B system. X-ray diffraction (XRD) results show a tetragonal and BCC structure for the Nd2Fe14B and FeAl systems, respectively. The results obtained by vibrating sample magnetometry (VSM), for mixtures of the Nd2Fe14B and Fe90Al10 sy stems sintered at 300 °C, 400 °C and 500 °C, allow for the conclusion that the coercive field (Hc) decreases drastically with temperature and the percentage of soft phase at values of Hc = 132 Oe compared to the coercive field values reported for Nd2Fe14B Hc = 6883 Oe, respectively. Images obtained by transmission electron microscopy (TEM), for the Fe90Al10 system, show a tendency for the nanoparticles to agglomerate.

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Section: Resultssupporting

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Production and Characterization of Nanostructured Powders of Nd2Fe14B and Fe90Al10 by Mechanical Alloying

et al. 2022

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“…Recent studies have also shown that Fe-Al alloys are promising candidates for data storage, due to the presence of some magnetic patterns appearing at room temperature [2][3][4]. At the same time, the magnetic properties of Fe-Al alloys are strongly linked to their chemical structure, since depending on composition and synthesis method, they can behave either as a ferromagnet or a paramagnet at room temperature [5][6][7]. It is also possible to induce in these compounds new types of cooperative phenomena, such as superparamagnetism and reentrant spin glass like phases [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Cluster size effects in the magnetic properties of Fe$_p$-Al$_{q=1-p}$ alloys

Santos-Filho,

Santos,

Batista

et al. 2019

Preprint

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A spin-1/2 Ising model, defined in the body centered cubic lattice, is used to describe some of the thermodynamic properties of Fep-Alq alloys, with p + q = 1. The model assumes, besides the nearest-neighbor exchange coupling, the existence of further next-nearest-neighbor superexchange interactions, where the latter ones depend on the aluminum atoms cluster size. The Ising system so considered is studied by employing Monte Carlo simulations, using a hybrid algorithm consisting of one single-spin Metropolis move together with one single-cluster Wolff algorithm allied, in addition, with single histograms procedures and finite-size scaling techniques. Quite good fits to the experimental results of the ordering critical temperature, as a function of Al concentration in the range 0 ≤ q < 0.7, are obtained and compared to more recent theoretical approaches done on the same alloys.

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“…Para altas concentraciones de hierro forma el intermetálico Fe3Al, el cual se caracteriza por tener un com-portamiento ferromagnético [4]. Las propiedades mecánicas y magnéticas presentes en las aleaciones dependen en gran medida de la composición y la técnica de síntesis [5].…”

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Estudio estructural y microestructural de la aleación Al_xFe_(1-x) (x=0.25, 0.5 y 0.75) obtenida por horno de arco

Cabrera

2021

Rev. Inv. Fis.

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Las aleaciones Fe-Al en las composiciones Al25Fe75, Al50Fe50 y Al75Fe25 fueron sintetizados por la técnica de horno de arco y luego tratadas térmicamente ha 6000C. El difractograma de rayos X (DRX) y la espectroscopia Mössbauer (EM) muestran la formación del intermetálico FeAl y Al13Fe4 para las composiciones Al50Fe50 y Al75Fe25 y la solución sólida Fe(Al) rica y pobre en hierro para todas las composiciones

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Evidence of Dipolar Magnetic Interaction in Melted Fe50Al50 Samples

Cited by 5 publications

References 25 publications

Production and Characterization of Nanostructured Powders of Nd2Fe14B and Fe90Al10 by Mechanical Alloying

Production and Characterization of Nanostructured Powders of Nd2Fe14B and Fe90Al10 by Mechanical Alloying

Cluster size effects in the magnetic properties of Fe$_p$-Al$_{q=1-p}$ alloys

Estudio estructural y microestructural de la aleación Al_xFe_(1-x) (x=0.25, 0.5 y 0.75) obtenida por horno de arco

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