Local Structure and Magnetic Properties of FeMnAl Nanocrystalline and Amorphous Alloys

Abstract:

The structural and the magnetic properties of nanocrystalline and amorphous Fe₅₅Mn₁₀Al₃₅ alloys prepared by the mechanical alloying process are studied as functions of the milling time varying from 1 hr to 48 hrs. Structural analyses based on X-ray diffraction (XRD) and extended X-ray absorption fine structure spectroscopy (EXAFS) reveal that the alloying process took place after 12-hr milling. Nanocrystalline alloys are found until 24-hrs milling, and an amorphous phase afterward. Concerning the magnetic behavior, the data obtained from a vibrating sample magnetometer show that both the magnetization saturation (M_s) and the coercivity (H_c) are dependent strongly on the milling time and the crystallite size. By adjusting the milling time, both appropriate structural transformation and magnetization values are obtained.

• Periodical: Advanced Materials Research (Volume 277)
• Pages: 100-105
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.277.100
• Online since: July 2011
• Authors: Kontan Tarigan, D. S. Yang, S. C. Yu
• Keywords: Fe₅₅Mn₁₀Al₃₅ Nanocrystalline and Amorphous Alloys, Structural and Magnetic Properties

References

[1] R. Hasegawa, Present status of amorphous soft magnetic alloys, J. Magn. Magn. Mater. 215–216 (2000) 240-245.

DOI: 10.1016/s0304-8853(00)00126-8

[2] R. Hasegawa, Advances in amorphous and nanocrystalline magnetic materials, J. Magn. Magn. Mater. 304 (2006) 187–191.

[3] G. A. Perez Alcazar, J. A. Plascak, and E. Galvao da Silva, Magnetic properties of Fe-Mn-Al alloys in the disorder phase, Phys. Rev. B, vol. 4, (1988) 2816-2819.

DOI: 10.1103/physrevb.38.2816

[4] Heiko Bremers, Michael Fricke, and Jurgen Hesse, Structure and magnetic properties of FeMnAl alloys investigated by Mossbauer spectroscopy and X-ray diffraction, Hyperfine. Interact. 94 (1994) 1855-1859.

DOI: 10.1007/bf02063707

[5] M. M. Rico, Liga E. Zamaro, G. A. Peres Alcazar, J. M. Gonzalez, and A. Hernando Jr., Magnetic and Structural Study of Mechanically Alloyed Fe0. 7-xMnxAl0. 3, phys. Stat. sol. (b) 220, 445 (2000) 445-448.

DOI: 10.1002/1521-3951(200007)220:1<445::aid-pssb445>3.0.co;2-p

[6] M. M. Rico, G. Medina, G. A. Perez Alcazar, J. S. Munoz, S. Surinach, and M. D. Baro, Magnetic and Structural Properties of Mechanically Alloyed Fex Mn0. 70—x Al0. 30 (x = 0. 40 and 0. 45)Alloys, phys. stat. sol. (a) 189, No. 3, (2002) 811–816.

DOI: 10.1002/1521-396x(200202)189:3<811::aid-pssa811>3.0.co;2-r

[7] J. Restrepo, G. A. Perez Alcazar, J. M. Gonzalez, Magnetic properties of disordered Fe0. 9 –xMn0. 1Alx alloys, J. Appl. Phys. Vol. 87 no. 10 (2000) 7425-7429.

[8] A.F. Rebolledo, J.J. Romero, R. Cuadrado, J.M. Gonzalez, F. Pigazo, F.J. Palomares, M.H. Medina, G.A. Perez Alcazar, Magnetic properties of ball-milled Fe0. 6Mn0. 1Al0. 3 alloys, J. Magn. Magn. Mater. 316 (2007) e418–e421.

DOI: 10.1016/j.jmmm.2007.02.166

[9] D.S. Yang, I. Kim, Y. -G. Yoo, B. Jiang, S. -G. Min, and S. -C. Yu, EXAFS study for a magnetic shape memory alloy Ni-Mn-Ga, J. Kor. Phys. Soc., vol. 50 (2007) 1078–1083.

DOI: 10.3938/jkps.50.1062

[10] D. S. Yang, I. Kim, Y. -G. Yoo, and S. -C. Yu, EXAFS study for mechanically alloyed CoC , J. Phys. Soc. Japan, vol. 71 (2002) 487–490.

DOI: 10.1143/jpsj.71.487

[11] H. Shokrollahi, The magnetic and structural properties of the most important alloys of iron produced by mechanical alloying, J. Mater. Des. 30 (2009) 3374-3387.

DOI: 10.1016/j.matdes.2009.03.035

[12] Kontan Tarigan, Yong-Goo Yoo, Dong-Seok Yang, J. M. Grenèche, and Seong-Cho Yu, Local Ordering Study of Nanostructure FeMnAl Alloys, IEEE Trans. Mag., vol. 45, No. 6 (2009) 2492-2495.

DOI: 10.1109/tmag.2009.2018670

[13] J. Sort, S. Surinach, J. S. Munoz and M. D. Baro, J. Nogues, G. Chouteau, V. Skumryev and G. C. Hadjipanayis, Improving the energy product of hard magnetic materials, Phys. Rev. B 65 (2002) 174420-1 - 174420-5.

DOI: 10.1103/physrevb.65.174420