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Enhanced magnetostriction in iron-rich Fe–Ga alloys has been attributed to a heterogeneous nanostructure with tetragonal inclusions, although direct experimental evidence for their structure was lacking. Here we use transmission electron microscopy to show that melt-spun, (001) textured Fe83Ga17 ribbons contain 3 nm inclusions with c-axis Ga–Ga pairs aligned in a tetragonal L60-type structure; the...
Zone-melting directional solidification was applied to prepare oriented or single crystals of NiMnGa magnetic shape memory alloys. The concave height of the quenched solid–liquid interface of the NiMnGa crystals was investigated. It was found that by increasing the temperature gradient, the crystal growth velocity, and the zone-melting length, the concave height of the solid–liquid interface could...
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