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Antiferromagnetic‐to‐ferromagnetic transition induced by aluminum in the Ti(Fe 1− x Al x ) 2 intermetallic compounds: a 57 Fe Mössbauer spectroscopy study
Author(s) -
Delyagin N. N.,
Erzinkyan A. L.,
Parfenova V. P.,
Rozantsev I. N.
Publication year - 2007
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200743026
Subject(s) - ferromagnetism , antiferromagnetism , hyperfine structure , intermetallic , magnetic moment , materials science , atom (system on chip) , mössbauer spectroscopy , condensed matter physics , impurity , transition metal , crystallography , mössbauer effect , chemistry , atomic physics , physics , metallurgy , biochemistry , alloy , organic chemistry , computer science , embedded system , catalysis
Mössbauer spectroscopy has been used to investigate the hyperfine field distributions and the local spin configurations of Fe atoms in the magnetically ordered Ti(Fe 1− x Al x ) 2 compounds. The evolution of the spin arrangement of the Fe atoms was observed over the concentration range 0 ≤ x ≤ 0.25 at 5 K. The Al impurity suppresses the ferromagnetic exchange in the Fe(6h) layers and simultaneously provides the conditions for a transition of the Fe(2a) atoms, which are nonmagnetic in the TiFe 2 compound, to the states with nonzero magnetic moment. The magnetic behavior of the Fe(2a) atoms is the key factor governing the anti‐ to ferromagnetic transition in the Ti(Fe 1− x Al x ) 2 compounds. The magnetic ordering temperatures of the Ti(Fe 1− x Al x ) 2 compounds were determined. In addition, the parameters of the electric‐field gradient in TiFe 2 as well as the relationship between the value of the magnetic moment of the Fe atom and the type of atomic configuration were discussed. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)