Inducing strong magnetism in Cr20Mn20Fe20Co20Ni20 high-entropy alloys by exploiting its anti-Invar property
M. Acet
AIP Advances · 2019
doi:10.1063/1.5120251 (opens in a new tab)
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Abstract
The equiatomic high-entropy alloy Cr20Mn20Fe20Co20Ni20 high-entropy alloy has a valence-electron-concentration of 8 electrons/atom which is equivalent to that of Fe. The alloy being FCC is therefore electronically equivalent to FCC-Fe. We show through the thermal expansion properties that the alloy carries similar anti-Invar properties as FCC-Fe, but unlike FCC-Fe it is stable throughout its solid-state temperature-range. Therefore, by exploiting the anti-Invar property and expanding the lattice of the alloy by introducing interstitial carbon, we make Cr20Mn20Fe20Co20Ni20 ferromagnetic with a Curie temperature lying above room temperature.
Abstract licence: CC BY
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