Abstract
Fe79Mn21, (Fe79Mn21)90Cu10, and (Fe79Mn21)80Cu20, alloys, prepared by high energy ball milling were characterized by Mössbauer spectroscopy, X-ray diffraction and ac-susceptibility. Results indicate that the Cu addition favors the formation of a FCC phase with two different magnetic states at room temperature, i.e., an antiferromagnetic and a paramagnetic one. Thermal evolution of the Mössbauer spectra revealed the occurrence of a magnetic ordering along a wide temperature range. This behavior is probably related to Fe atoms in FCC-Fe(Mn,Cu) phase having different environments and grain size distribution. Thermal dependence of in-phase ac-susceptibility shows that a long range ordering starts at 240 K for the Fe79Mn21 alloy and shifts towards lower temperatures with the Cu content. These results would reflect a long-range magnetic ordering transition with a distribution of ordering temperatures rather than a blocking process of particle single-domains.
Similar content being viewed by others
References
Paduani C., Galvao da Silva E. and Pérez Alcázar G. A., Hyperfine Interact. 73 (1992), 233.
Belozerskiy G., Gittsovich V., Kramar V., Sokolov O. and Khimich Y., Phys. Met. Metallog. 35(3) (1973), 20.
Petrov Y., Shafranovsky E., Baldokhin Y. and Kochetov A., J. App. Phys. 86(12) (1999), 7001.
Spisak D. and Hafner J., Phys. Rev.B 61(17) (2000), 11569.
Restrepo J., Morales A. L., González J. M., Pérez Alcázar G. A., Medina G., Barrero C. A., Tobon J., Pérez G., Arnache O., Betancur J. D. and Giraldo M. A., Hyperfine Interact. 134 (2001), 199; Restrepo J. and Greneche J. M., Hyperfine Interact. 156/157 (2004), 69; Restrepo J., Greneche J. M. and Gonzalez J. M., Physica B 354 (2005), 174.
Alocén M. C., Crespo P., Hernando A. and Gonzalez J. M., J. Non-Cryst. Solids 287 (2001), 268.
Brand R. A., Nucl. Instrum. Methods Phys. Res., B 28 (1987), 417.
Gauzzi F., Verdini B., Principi G. and Badan B., J. Mater Sci. 18 (1983), 3661.
Roy M. K. and Verma H. C., J. Magn. Magn. Mat. 270 (2004), 186.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Mizrahi, M., Stewart, S.J., Cabrera, A.F. et al. Mössbauer Investigation of Fe–Mn–Cu Nanostructured Alloys Obtained by Ball Milling. Hyperfine Interact 161, 171–176 (2005). https://doi.org/10.1007/s10751-005-9179-z
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10751-005-9179-z