Evidence of dipolar magnetic field in mechanically alloyed Fe50Al50 samples

Bustos, H.; Oyola, D.; Rojas, Y. A.; Alcázar, G. A. Pérez; Gonzalez, Juan M.; Margineda, Daniel

doi:10.1016/j.jallcom.2012.01.006

Cited by 9 publications

(5 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In all these systems, the dipolar magnetic interaction plays an important role. This type of interaction was recently detected in microparticulated powders in the Fe-Mn-Al [22], Fe-Si [23] and Fe-Al [24] systems.…”

Section: Introductionmentioning

confidence: 65%

See 1 more Smart Citation

Magnetism in Granular Systems II

Salazar

Alcázar

2015

J Supercond Nov Magn

View full text Add to dashboard Cite

Considering that the dipolar magnetic interaction plays an important role in the study of the magnetic properties of nano-and microparticulated systems, in this work, we use the theoretical expression of the blocking temperature derived in the model recently proposed by the current authors (Salazar and Pérez Alcázar, J. Supercond. Nov. Magn. 25, [2213][2214][2215] 2012), with the aim of obtaining an expression for the variation of the coercive field, H c , with temperature. In this calculation, we assume that the anisotropy constant of the system depends on the temperature. We also use the model to report the way in which the specific heat behaves as a function of temperature.

show abstract

Section: Introductionmentioning

confidence: 65%

“…(2) and (4) Fig. 4 Tridimensional representation of (12) showing the relationships among the heat capacity (erg/K), temperature T (K) ∈ [5,24], and the angle θ…”

Section: Coercive Fieldmentioning

confidence: 99%

Magnetism in Granular Systems II

Salazar

Alcázar

2015

J Supercond Nov Magn

View full text Add to dashboard Cite

show abstract

“…Sin embargo, el desarrollo comercial de estos materiales no ha sido muy bueno por su baja ductilidad a temperatura ambiente y baja resistencia mecánica por encima de la temperatura 600 0 C. Para altas concentraciones de aluminio se forman diferentes tipos de aleaciones intermetálicas tales como FeAl2 , FeAl3 , Fe13Al4, las cuales tienen un comportamiento paramagnético. A altas concentraciones de hierro se forma el intermetalico Fe3Al, el cual se caracteriza por tener un comportamiento ferromagnético [Bustos12]. Las propiedades mecánicas y magnéticas presentes en las aleaciones dependen en gran medida de la composición y la técnica de síntesis [Ligia09] .…”

Section: Introductionunclassified

Estudio estructural y microestructural de la aleación AlxFe1−x (x=0.25; 0.5 y 0.75) obtenida por molienda mecánica

2021

View full text Add to dashboard Cite

Las aleaciones de Fe-Al en las composiciones Al25Fe75, Al50Fe50 y Al75Fe25 fueron sintetizado por la técnica del horno de arco y luego tratando térmicamente ha 6000C. El difractograma de rayos X (DRX) y la espectroscopia Mössbauer (EM) muestran la formación de la solución sólida Fe(Al) rica y pobre en átomos de aluminio. A 10 horas de molienda mecánica se observa la formación de la maghemita γ − Fe2O3(Al) para las composiciones Al25Fe75 y Al50Fe50 con átomos de aluminio ocupando algunos sitios de hierro. En el caso de la composición Al75Fe25 se observa el intermetalico Al13Fe4, permaneciendo estructuralmente invariante durante el proceso de nanoestructuración.

show abstract

“…Recently, it was shown that this type of interaction is also present in microparticulated systems such as alloys of FeSi [6], Fe-Al [7] and Fe-Mn-Al [8]. In this study, we present theoretical calculations of the thermodynamic properties of a nanoparticulated system using the model proposed by Mørup-Tronc.…”

Section: Introductionmentioning

confidence: 99%

“…We use the total energy to calculate the magnetization, heat capacity, magnetic susceptibility, and blocking temperature in nanoparticulated systems. The application of our theory to experimental data on nanoparticulated systems [3][4][5] and for the Fe-Al, Fe-Si, and Fe-Mn-Al microparticulated granular systems [6][7][8] will be presented elsewhere.…”

Section: Introductionmentioning

confidence: 99%

Magnetism in Granular Systems

Salazar

Alcázar

2012

J Supercond Nov Magn

View full text Add to dashboard Cite

Previous experimental studies have shown that the magnetic dipolar interaction plays an important role in several magnetic properties of nanoparticulated systems. More recently, this type of interaction was detected in microparticles of Fe-Mn-Al, Fe-Si and Fe-Al systems. In this work, we apply the Mørup-Tronc (Phys. Rev. Lett. 72:3278, 1994) model for nanoparticulated systems in order to calculate some thermodynamic properties of these systems. We first calculated the total energy of a magnetic particle as the sum of its anisotropy energy and its total dipolar magnetic interaction with the other particles. The calculation is performed in such a way that the interaction energy has the same form as the anisotropy energy. We use the total energy to calculate the magnetization, heat capacity, magnetic susceptibility, and blocking temperature in nanoparticulated systems. The application of our theory to experimental data on nanoparticulated systems and for the Fe-Al, Fe-Si and Fe-Mn-Al microparticulated granular systems will be presented elsewhere.

show abstract

Evidence of dipolar magnetic field in mechanically alloyed Fe50Al50 samples

Cited by 9 publications

References 26 publications

Magnetism in Granular Systems II

Magnetism in Granular Systems II

Estudio estructural y microestructural de la aleación AlxFe1−x (x=0.25; 0.5 y 0.75) obtenida por molienda mecánica

Magnetism in Granular Systems

Contact Info

Product

Resources

About