Correo Electrónico
DNINFOA - SIA
Bibliotecas
Convocatorias
Identidad U.N.
Published
Propiedades estructurales y magnéticas de aleaciones Gd0.257-xTbxFe0.743 obtenidas por aleamiento mecánico
Structural and magnetic properties of alloys of Gd0.257-xTbxFe0.743 obtained by mechanical alloying
DOI:
https://doi.org/10.15446/rev.fac.cienc.v6n1.61394Keywords:
Aleamiento mecánico, difractometría de rayos X, espectroscopía Mossbauer, sistema GdTbFe (es)Mechanical alloying, X-ray diffraction, Mossbauer spectroscopy, GdTbFe System (en)
Downloads
En el presente trabajo se reporta el estudio de las propiedades estructurales y magnéticas de la composición en forma de polvo de Gd0.257-xTbxFe0.743 con x=0, 0.1285, 0.257, preparadas por Aleamiento Mecánico (MA) en atmósfera de argón durante 72 horas mediante un molino planetario de alta energía. La caracterización estructural se realizó por medio de Difractometría de rayos X (XRD), para la caracterización magnética se utilizó la espectroscopía Mossbauer, los ciclos de histéresis de las muestras se obtuvieron utilizando un magnetómetro de muestra vibrante VSM (vibration sample magnetometry) de un sistema PPMS (Physical Property Measurement System). La fase de a-Fe se presenta para todo x mediante un pico característico cuya intensidad permanece ligeramente constante; sin embargo, si se observa una disminución del tamaño de cristalito de la fase a-Fe, resultado que se correlaciona con un aumento de su ancho al sustituir el Gd por el Tb. Los resultados de los espectros Mossbauer a temperatura ambiente indican que el sistema presenta un comportamiento ferromagnético para todas las composiciones y los ciclos de histéresis revelan que presenta un comportamiento magnéticamente semiduro.
In the present work the study of the structural and magnetic properties of the powder composition of Gd0.257-xTbxFe0.743 with x = 0, 0.1285, 0.257, prepared by Mechanical Alloying (MA) in argon atmosphere during 72 hours using a high energy planetary mill is reported. The structural characterization was performed by means of X-ray diractometry (XRD), for the magnetic characterization Mossbauer spectroscopy was used, the hysteresis cycles of the samples were obtained using the VSM (vibration sample magnetometry) of a PPMS (Physical Property Measurement System). The a-Fe phase is presented for all x by a characteristic peak whose intensity remains slightly constant, however, a decrease in the crystallite size of the a-Fe phase is observed, this result is correlated with an increase of its width when is replaced the Gd by the Tb. The results of the Mossbauer spectra at room temperature indicate that the system exhibits a ferromagnetic behavior for all compositions and the hysteresis cycles show that it exhibits magnetically semi-hard behavior.
References
Arrabal, R., Matykina, E., Pardo, A., Merino, M.C., Paucar, K., Mohedano, M. & Casajús, P. (2012). Corrosion behaviour of AZ91D and AM50 magnesium alloys with Nd and Gd additions in humid environments. Corrosion Science, 55, 351-362.
Avignant D., Largeau E., Gaumet V., Dugat P. & El-Ghozzi, M. (1998). Recent progress in tetravalent terbium chemistry. Journal of alloys and compounds, 275, 1-5.
Chaudari, P., Cuomo, J. J. & Gambino, R. J. (1973). Amorphous Metallic Films for Magneto-optic Applications. Applied Physics Letters, 22 (7), 337-339.
Lutterotti L. & Scardi P. (1990). J. Appl. Crystallogr. 23, 246-252.
Rojas, Y., Oyola, D., Bustos, H., Pérez, G. & Greneche, J. (2012). Study of the Magnetical and Structural Properties of Powders of Tb0.257-xNdxFe0.743 Mechanically Alloyed. Revista Colombiana de Física, 44 (2), 155-158.
Sallica, E., Peña Rodríguez, V. A., Vásquez Mansilla, M. & Butera, A. (2009). Dependencia de las propiedades magnéticas con el espesor en películas delgadas de FePt. Revista de Investigación de Física, 12 (2), 22-29.
Sánchez Villarejo, N. (2007). Del soporte papel perforado y cinta magnética ral disco 3d holográco anatómico nanotecnológico: nuevos soportes magneto-ópticos y ópticos de almacenamiento masivo de información. Revista Anales de Documentación, 10, 429-450.
Soliman, S. A. & Abu Zied, B. M. (2009). Thermal Genesis, Characterization, And Electrical Conductivity Measurements Of Terbium Oxide Catalyst Obtained From Terbium Acetate. Thermochimica Acta, 49 (1), 84-91.
Teillet , J. & Varret, F. (1976) MOSFIT program, Unpublished. Université du Maine, Le Mans, France.
How to Cite
APA
ACM
ACS
ABNT
Chicago
Harvard
IEEE
MLA
Turabian
Vancouver
Download Citation
License
Copyright (c) 2017 Revista de la Facultad de Ciencias
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
The authors or copyright holders of each paper confer to the Journal of the Faculty of Sciences of Universidad Nacional de Colombia a non-exclusive, limited and free authorization on the paper that, once evaluated and approved, is sent for its subsequent publication in accordance with the following characteristics:
- The corrected version is sent according to the suggestions of the evaluators and it is clarified that the paper mentioned is an unpublished document on which the rights are authorized and full responsibility is assumed for the content of the work before both the Journal of the Faculty of Sciences, Universidad Nacional de Colombia and third parties.
- The authorization granted to the Journal will be in force from the date it is included in the respective volume and number of the Journal of the Faculty of Sciences in the Open Journal Systems and on the Journal’s home page (https://revistas.unal.edu.co/index.php/rfc/index), as well as in the different databases and data indexes in which the publication is indexed.
- The authors authorize the Journal of the Faculty of Sciences of Universidad Nacional de Colombia to publish the document in the format in which it is required (printed, digital, electronic or any other known or to be known) and authorize the Journal of the Faculty of Sciences to include the work in the indexes and search engines deemed necessary to promote its diffusion.
- The authors accept that the authorization is given free of charge, and therefore they waive any right to receive any emolument for the publication, distribution, public communication, and any other use made under the terms of this authorization.
- All the contents of the Journal of the Faculty of Sciences are published under the Creative Commons Attribution – Non-commercial – Without Derivative 4.0.License
MODEL LETTER OF PRESENTATION and TRANSFER OF COPYRIGHTS
Personal data processing policy
The names and email addresses entered in this Journal will be used exclusively for the purposes set out in it and will not be provided to third parties or used for other purposes.
