Abstract
The magnetic structure of ordered alloys Fe0.75−x Al0.25+x (x = 0, 0.025, and 0.05) is studied by Mössbauer 57Fe spectroscopy in a temperature range of 5–295 K. An increase in the Al concentration at T = 5 K induces a transition from collinear ferromagnetism (x = 0) to a magnetic structure of the cluster-spin-glass type (x = 0.05). The unexpectedly strong effect of aluminum on the magnetic structure is explained by the anomalously high probability of formation of frustrated magnetic configurations with a large number of Al atoms in the nearest neighborhood of Fe atoms. This anomaly is associated with the establishment of a short-range order, which is a key factor determining the radical change in the magnetic structure in a narrow range of Al concentration. The “intermediate” phase of the Fe0.70Al0.30 alloy (100 K < T < 200 K) is a mixed-type magnetically ordered phase whose magnetic structure is determined by the competition of opposite exchange interactions. The nominally “ferromagnetic” phase of this alloy (T > 200 K) is characterized by strong violation of the long-range ferromagnetic order, which is due to the effect of the antiferromagnetic superexchange interaction.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
R. D. Shull, H. Okamoto, and P. A. Beck, Solid State Commun. 20, 863 (1976).
J. W. Cable, L. David, and R. Parra, Phys. Rev. B 16, 1132 (1977).
P. Shukla and M. Wortis, Phys. Rev. B 21, 159 (1980).
K. Motoya, S. M. Shapiro, and Y. Muraoka, Phys. Rev. B 28, 6183 (1983).
K. Motoya, K. Hioki, and J. Suzuki, J. Phys. Soc. Jpn. 72, 3212 (2003).
W. Bao, S. Raymond, S. M. Shapiro, et al., Phys. Rev. Lett. 82, 4711 (1999).
V. P. Parfenova, N. N. Delyagin, A. L. Erzinkyan, and S. I. Reyman, Phys. Status Solidi B 42, 1465 (2000).
D. Satula, L. Dobrzynski, J. Waliszewski, et al., J. Magn. Magn. Mater. 169, 240 (1997).
T. J. Burch, K. Raj, P. Jena, et al., Phys. Rev. B 19, 2933 (1979).
H. Chacham, E. Galvao da Silva, D. Guenzburger, and D. E. Ellis, Phys. Rev. B 35, 1602 (1987).
B. Huck and J. Hesse, J. Magn. Magn. Mater. 78, 247 (1989).
G. P. Das, B. K. Rao, P. Jena, and S. C. Deevi, Phys. Rev. B 66, 184203 (2002).
G. S. Grest, Phys. Rev. B 21, 165 (1980).
B. V. Reddy, S. C. Deevi, F. A. Reuse, and S. N. Khanna, Phys. Rev. B 64, 132408 (2001).
G. Aeppli, S. M. Shapiro, R. J. Birgeneau, and H. S. Chen, Phys. Rev. B 28, 5160 (1983).
Author information
Authors and Affiliations
Additional information
__________
Translated from Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Fiziki, Vol. 128, No. 6, 2005, pp. 1243–1251.
Original Russian Text Copyright © 2005 by Delyagin, Erzinkyan, Parfenova, Rozantsev.
Rights and permissions
About this article
Cite this article
Delyagin, N.N., Erzinkyan, A.L., Parfenova, V.P. et al. Transition from the ferromagnetic state to the spin glass state in ordered Fe0.75−x Al0.25+x alloys and the temperature evolution of the magnetic structure of the Fe0.70Al0.30 alloy. J. Exp. Theor. Phys. 101, 1091–1097 (2005). https://doi.org/10.1134/1.2163924
Received:
Issue Date:
DOI: https://doi.org/10.1134/1.2163924