Metalurgia Física

• Propiedades mecánicas, magnéticas y resistencia a la corrosión de aleaciones metálicas

Modelos Teóricos Estadísticos

• Simulación Monte Carlo de Sistemas Magnéticos

• Simulaciones a través de micromagnetismo

Protección Radiológica

Imanes Permanentes Libres de Tierras Raras

Magnetización

• Sistema magnético nanoestructurado

• Materiales magnéticos blandos

• Materiales magnéticos duros

• Imanes permanentes

• Diagramas de fases magnéticas (Teoría y Experimentación)

• Development of rare earth free permanent magnets with different compositions. 

• Nuevas aleaciones Fe-Mn-Al-C como potencial reemplazo de aceros convencionales empleados en la industria nacional.

• Diseño de la composición química de un nuevo acero Fermanal (FeMnAlC) y un tratamiento térmico adecuado para maximizar el rendimiento de cuchillas con aplicación en máquinas cosechadoras de caña. Colciencias, Organización Hércules y Univalle. 2016-actual.

• L. Girón, E. Salcedo, G. A. Pérez Alcázar, “Análisis espectral del sismo del 27 de agosto de 2013 ocurrido en el Valle del Cauca, Colombia”, Boletín de Geología, 42(2), 49 (2020).

• Iván Camilo Quintero, Leonardo Pérez Gongora, Héctor Sánchez, Germán A. Pérez Alcázar, “Study of compacting and sintering of 302 and 410 stainless steels obtained from mechanical alloying, Dyna, (2020).

• H. Martínez Sánchez, L. E. Zamora, J. S. Trujillo, D. Salazar, and G. A. Pérez Alcázar, “Improved of Intrinsic Magnetic Properties by Nitrogenation in Alloys with ThMn12-type Structure”. Aceptado en IEEE Transactions on Magnetism. 

• J. F. Piamba, C. Ortega, R. Hernández-Bravo, J. M. González Carmona, J. A. Tabares, G. A. Pérez Alcázar, and J.M. Alvarado-Orozco, “Theoretical and Experimental Study of FeSi on Magnetic and Phase Properties”. Submitted to Applied Physics A.

• Marisela Benitez, J. Sebastián Trujillo, German A. Pérez Alcázar, “Effect of chrome on the magnetic and structural properties of Mn57-xAl43Crx (x = 0.51, 0.91, 1.51) and Mn53.3-XAl45C1.7Crx (x = 0.0, 0.5, 1.0, 1.5, 2.0, 2.5) alloy systems”. Material Letters.2021

• H. Martínez Sánchez, L. E. Z. Alfonso, J. S. T. Hernandez, D. S. Jaramillo and G. A. P. Alcázar, "Effect of Nitrogenation on the Intrinsic Magnetic Properties of the Compounds (Nd1-xCeₓ)1.1Fe₁₀CoTi," in IEEE Transactions on Magnetics, vol. 56, no. 11, pp. 1-5, Nov. 2020, Art no. 2200205, doi: 10.1109/TMAG.2020.3020094.

• J.D. Gamez, H. Martínez-Sánchez, J.L. Valenzuela, L. Marín, L.A. Rodríguez, E. Snoeck, L.E. Zamora, G.A. Pérez Alcázar, and J.A. Tabares, “Magnetic t-MnAlC thin film fabrication by high-vacuum thermal evaporation”. Material Letters 293 129657 (2021).

• H. Martínez Sánchez, G.A. Pérez Alcázar, D. Salazar, J.S. Garitaonandia, J.S Trujillo Hernández, and Ligia E. Zamora, “Ferromagnetic exchange coupling in permanent magnets of 𝜏−Mn53.3Al45.0C1.7/FeCoY with Y=Ti, Zr and Ce”. Submitted to Applied Physics A"(2020).

• J. D. Arias, H. Colorado, M. Benítez, and G. A. Pérez Alcázar, “Production and structural and magnetic characterization of cooper oxide nanocrystals with large Fe contents”. Hyperfine Interactions https://doi.org/10.1007/s10751-020-01723-1.

• H. Martínez Sánchez, L. E. Zamora Alfonso, J. S. Trujillo Hernandez, D. Salazar, and G. A. Pérez Alcázar, “Study of the exchange ferromagnetic coupling between hard t-Mn53.3Al45.0C1.7 and soft Mn50B50 magnetic alloys”, Aceptado en IEEE Transaction Magnetics.

• J. S. Trujillo, A. Talaat, J. A. Tabares, D. Oyola, H. Bustos, H. Martínez, and G. A. Pérez Alcázar, “Structural, Magnetic and Mechanical Properties of Nd16(Fe76-xCox)B8, 0 ≤ x ≤ 25”. Aceptado en Applied Sciences. 

• J.S. Rodríguez, J.F. Duran, Y. Aguilar, G.A. Pérez Alcázar, O.A. Zambrano, “Failure analysis in sugar cane cutter base Blades”. Engineering Failure Analysis 112 104503 (2020). 

• H. Colorado and G. A. Pérez Alcázar, “Fe content and calcination temperature effects on CuO nanoparticles”. Hyperfine Interactions, 241 51 (2020).

• H. Martínez Sánchez, Daniel Salazar, L. E. Zamora Alfonso, J. S. Trujillo Hernández, J. A. Tabares Giraldo, and G. A. Pérez Alcázar, “Mössbauer spectroscopy in the system (Nd1-xCex)1.1Fe10CoTi with ThMn12 structure”, Hyperfine Interactions 241 44 (2020).

• C. A. Palchucán, Ligia E. Zamora, G. A. Pérez Alcázar, and J. A. Tabares, “Mössbauer and structural study of the Fe3Sn system and the Effect of Doping with Indium”, Hyperfine Interactions 241 42 (2020).

• J.F. Durán Perdomo, G. A. Pérez Alcázar, H.D. Colorado, J.A. Tabares, L.E. Zamora, and J.J.S. Garitaonandia, “Systematic study of the dependence of magnetic and structural properties of Nd2Fe14B powders on the average particle size”, Journal of Rare Earths, 38 961-968 (2020).

• Ruby R. Rodríguez, Germán A. Pérez Alcázar, Hernán Colorado, and Ligia E. Zamora, “Variation of Structural and Hyperfine Parameters of (Fe0.70Al0.30)1-xNbx, with x= 0, 0.05, 0.10 and 0.20 System, Obtained by Mechanical Alloying”. Journal Physics Conference Series, 1541 012014 (2020).

• M. Salazar and G.A. Pérez Alcázar, “Coercive field and Grüneisen's law”. Phys. B. 559 19-22 (2019).

• J.F. González Perdomo, J.S. Trujillo Hernández, D. Oyola Lozano, Y.A. Rojas Martínez, G.A. Pérez Alcázar, and H. Bustos Rodríguez, “Structural and magnetic properties study of Fe50Si50 powders with different microparticle sizes”. J. Superconductivity and Novel Magnetism. 32, 1383-1388 (2019).

• H. Martínez Sánchez, L. E. Zamora, J. S. Trujillo Herrera, and G. A. Pérez Alcázar, “Evidence of Exchange coupling in t-MnAlC/FeCo system”. J. Magn. Magn. Mater. 473, 221-227 (2019).

• M. Salazar and G. A. Pérez Alcázar, “The dissipative function in magnetic systems”. Phys. A. 517 337 (2019).

• M. Gjoka, Ch Sarafidis, G. Giannopoulos, D. Niarchos, G. Hadjipanayis, J. A. Tabares, G. A. Pérez Alcázar and L. E. Zamora, “Effect of Co substitution on structure and magnetic properties of Nd0.4 Zr0.6 Fe10-xCoxSi2 (x= 0-3) alloys and their ribbons”. Journal of Rare Earth. 37 (2019) 1096-1101 

• J.D. Gámez, H. Martínez-Sánchez, J.L. Valenzuela, L. Marín, L.A. Rodríguez, E. Snoeck, L.E. Zamora, G.A. Pérez Alcázar, and J.A. Tabares, “Magnetic t-MnAlC thin film fabrication by high-vacuum thermal evaporation”. Material Letters 293 129657 (2021). https://doi.org/10.1016/j.matlet.2021.129657 

• Marisela Benítez, J. Sebastián Trujillo, Germán A. Pérez Alcázar, “Effect of chrome on the magnetic and structural properties of Mn57-xAl43Crx (x = 0.51, 0.91, 1.51) and Mn53.3-XAl45C1.7Crx (x = 0.0, 0.5, 1.0, 1.5, 2.0, 2.5) alloy systems”. Materials Letters 295 129853 (2021). https://doi.org/10.1016/j.matlet.2021.129853 

• A. Casanova, G. A. Pérez Alcazar, W. R. Aguirre, D. Salazar & Ligia E. Zamora. Effect of the Milling Conditions on the Properties of ZnO Doped with Fe.  Journal of Superconductivity and Novel Magnetism. 

• C. Salazar, M. A. Llano, G. Pérez, J. D. Urresta. Síntesis y caracterización de los sistemas ácidos WO3/ZrO2 y WO3/TiO2 aplicados en la hidratación de etileno a etanol. Revista Ion, Número (2). ISSN: 2145-8480. Pág. 43-54 (2017). 

• H. Martínez Sánchez, L. E. Zamora Alfonso, J. S. Trujillo Hernández, and G. A. Pérez AlcázarEvidence of exchange coupling in 𝝉-MnAlC/FeCo system. . Aceptado en JMMM. Journal of Magnetism and Magnetic Materials, 2018.

• J. S. Trujillo Hernández, J. A. Tabares, and G. A. Pérez Alcázar. Structural, magnetic, and mechanical hardness characterization of the alloy Nd16 (Fe76−xNix) B8 with x = 0, 10, 20, and 25.  Applied Physics A.VOLUMEN 124, ARTÍCULO 698, 2018. 

• J.F. González Perdomo, J.S. Trujillo Hernández, D. Oyola Lozano, Y.A. Rojas, Martínez, G.A. Pérez Alcázar, and H. Bustos Rodríguez. Structural and magnetic properties study of powders with different microparticles sizes. REVISTA: Journal of Superconductivity and Novel Magnetism. VOLUMEN 31. ISSN 1557-1939, 2018 

• C. E. Echeverry N., J. S. Trujillo, M. J. Rojas S., J. A. Tabares, F. Maccari, A. Cortes, and G. A. Pérez Alcázar. Processing and characterization of Nd2Fe14B microparticles prepared by surfactant-assisted ball milling”. REVISTA: Applied Physics A. VOLUMEN 124. Artículo 564, 2018. 

• J. S. Trujillo Hernández, F. Maccaric, L. G. Marshalld, Jesús A. Tabares, And G. A. Pérez. Exchange coupling in MnAlC/α-Fe nanocomposite magnets.  Revista Journal Of Superconductivity and Novel Magnetism. 

• A. Casanova, G. A. Pérez, W.R. Aguirre, D. Salazar, L. Zamora. Effect of the milling Conditions on the properties of ZnO Doped with Fe. Journal of Superconductivity and novel Magnetism incorporating Novel Magnetism. Volumen 31, NÚMERO 4. ISSN: 1557-1939. PÁG. 1-8. 2018. 

• J.D. Betancourt, G.A. Pérez, J. Nomura, C.J. Wang And J.A Tabares. Thermal oxidation behaviors and structures of Fe-9Cr-1Mo alloy. REVISTA HYPERFINE INTERACTIONS, VOLUMEN 238, ISSN: 0304-3843. ARTICLE 88, ISSUE 1, PÁG.1-10. NOVEMBER 2017. 

• G. A. Pérez Alcázar, “Imanes permanentes: características, aplicaciones y futuro”. Rev. Acad. Colomb. Cienc. Ex. Fis. Nat. 40 (155): 221-233, (2016).

• M. Salazar and G.A. Pérez Alcázar, “Magnetism in Granular Systems II”. J. Supercond. Nov. Magn. 29(1) 153-156 (2016).

• H. Bustos, D. Oyola, Y. Rojas, J. S. Trujillo, and G. A. Pérez Alcázar, “Evidence of dipolar magnetic interaction in melted Fe50Al50 samples”. J. Supercond. Nov. Magn. DOI 10.1007/s10948-016-3429-y (2016).

• M. Salazar and G. A. Pérez Alcázar, “Landau-Lifshitz-Gilbert equation with symmetric coefficients of the dissipative function II”. Phys. A. 453 144-149 (2016).

• Juan A. Jaén, Josefina Iglesias, Alcides Muñoz, Jesús A. Tabares, Germán A. Pérez Alcázar, “Characterization of Magnesium Doped Lithium Iron Silicate”, Croat. Chem. Acta  88(4), DOI: 10.5562/cca2764 (2016).

• J. S. Trujillo Hernández, J. A. Tabares y G. A. Pérez Alcázar, ¨Effect of heat treatment on the structural and magnetic properties of the system Fe56.25Al43.75 prepared by mechanical alloying¨, Rev. LatinAm. Metal. Mat. 35 49-54 (2015).

• M. Salazar and G. A. Pérez Alcázar, “Landau-Lifshitz-Gilbert equation with symmetric coefficients of the dissipative function”. Phys. A, 424 312-316 (2015).

•  J. Ramos, J. F. Piamba, H. Sánchez, G. A. Pérez Alcázar, “Mössbauer and XRD characterization of the phase transformations in a Fe-Mn-Al-C-Mo-Si-Cu as cast alloy during tribology test”. Hyp. Int. 232 119-126 (2015).

•  Juan A. Jaén, Miguel Jiménez, Eibar Flores, Alcides Muñoz, Jesús A. Tabares, and Germán A. Pérez Alcázar, “Structural study on Li2Fe1-xNixSiO”. Hyp. Int. 232 127-140 (2015).

• Ligia E. Zamora, J.C. Paz, J.F. Piamba, J.A. Tabares, and G.A. Pérez Alcázar, “A Mössbauer and magnetic study of ball milled Fe-doped ZnO Powders”. Hyp. Int. 232 111-118 (2015).

• Edson Daniel Benitez Rodríguez, Humberto Bustos Rodríguez, Dagoberto Oyola Lozano, Yebrail Antonio Rojas Martínez, German Antonio Pérez Alcázar, “Mössbauer study of alloy Fe67.5Ni32.5 prepared by mechanical alloying”. Hyp. Int. 232 87-95 (2015).

•  J.L. Valenzuela, J.F. Valderruten, G.A. Pérez Alcázar, H.D. Colorado, J.J. Romero, J.M. González, J.M. Greneche, and J.F. Marco, “Low temperature study of mechanically alloyed Fe67.5Ni32.5 Invar sample”. J. Mag. Mag. Mater. 385 83-87 (2015).

•  J. F. Piamba and G. A. Pérez Alcázar, “Effect of Disorder on the Structural and Magnetic Properties of the Fe50Si50 Nanostructured System”. J. Alloys Compds. 643 S297-S301 (2015).

• G.Y. Vélez and G.A. Pérez Alcázar, “Influence of atomic ordering on sigma phase precipitation of the Fe50Cr50 alloy”, J. Alloys Compds. 644 1009-1012 (2015).

• J. S. Trujillo Hernández, A. Aragón Muriel, J. A. Tabares, G. A. Pérez Alcázar and A. Bolaños, “Preparation of Fe3O4 Nanoparticles and Removal of Methylene Blue through Adsorption”, Journal of Physics: Conference Series, 614 012007 (2015).