High-pressure synthesis of L10 MnAl with near-stoichiometric composition.
Dalton Trans
; 45(27): 10936-41, 2016 Jul 05.
Article
em En
| MEDLINE
| ID: mdl-27302146
ABSTRACT
L10 MnAl, which is a nonequilibrium ferromagnetic phase, is fabricated successfully with various compositions via high-pressure synthesis. The L10 phase is observed at pressures higher than 5 GPa, indicating that the volume effect is crucial for the stabilization of this phase. The employed synthesis route does not require a Mn-rich ε-phase, which has conventionally been used as the precursor compound. This allows for the synthesis of the L10 phase with a near-stoichiometric composition. In addition to variations in the composition in terms of the Mn/Al ratio, the axial ratio (c/a) as well as the ordering parameter (S) are modified systematically, with the maximum c/a and S values corresponding to the stoichiometric composition. With this structural change, the highest coercive force is also observed at the stoichiometric composition.
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MEDLINE
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En
Ano de publicação:
2016
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Article