Multicaloric MnNiSi alloys
AssigneesBoard of Supervisors of Louisiana State University and Agricultural and Mechanical College, Board of Trustees of Southern Illinois University
InventorsTapas Samanta, Shane Stadler, Naushad Ali
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Abstract
A multicaloric alloy material combines two isostructural compounds, the first compound being MnNiSi and the second compound being either MnFeGe or CoFeGe, each such compound having extremely different magnetic and thermo-structural properties. The resulting alloy material (MnNiSi)1-x(MnFeGe)x or (MnNiSi)1-x(CoFeGe)x possesses extraordinary magnetocaloric and/or barocaloric properties with an acute sensitivity to applied pressure and no appreciable magnetic hysteresis losses.
Claims6
An alloy consisting of:
- a first compound, said first compound comprising Mn1±αNi1±βSi1±γ, wherein α≤0.25, γ≤0.25, and γ≤0.25;
- a second compound, said second compound isostructurally substituting the first compound, and said second compound comprising one of Fe1±λMn1±μGe1±ν wherein λ≤0.25, μ≤0.25, and ν≤0.25 and Co1±λFe1±μGe1±ν wherein λ≤0.25, μ≤0.25, and ν≤0.25;
- where the ratio of the first compound to the second compound is 1-x to x;
- and
- where when the second compound comprises Co1±λFe1±μGe1±ν then x is from 0.30 to 0.50, and when the second compound is Fe1±λMn1±μGe1±ν then x is from 0.40 to 0.65.
An alloy consisting of:
- a first compound, said first compound comprising Mn1±αNi1±βSi1±γ, wherein α≤0.25, β≤0.25, and γ≤0.25;
- a second compound, said second compound isostructurally substituting the first compound, and said second compound comprising one of Fe1±λMn1±μGe1±ν wherein λ≤0.25, μ≤0.25, and ν≤0.25 and Co1±λFe1±μGe1±ν wherein λ≤0.25, μ≤0.25, and ν≤0.25;
- where the ratio of the first compound to the second compound is 1-x to x;
- and
- where when the second compound comprises Co1±λFe1±μGe1±ν then x is from 0.30 to 0.50, and when the second compound is Fe1±λMn1±μGe1±ν then x is from 0.40 to 0.65 and further comprising an element from the group consisting of B, C, N, P, S, As and H, the element from the group consisting of B, C, N, P, S, As and H comprising not more than 15% by mass of the alloy.
An alloy consisting of
- a first compound, said first compound comprising Mn1±αNi1±βSi1±γ, wherein α≤0.25, β≤0.25, and γ≤0.25;
- and
- a second compound, said second compound isostructurally substituting the first compound, and said second compound comprising Fe1±λMn1±μGe1±ν, wherein λ≤0.25, μ≤0.25, and ν≤0.25.
An alloy consisting of
- a first compound, said first compound comprising Mn1±αNi1±βSi1±γ, wherein α≤0.25, β≤0.25, and γ≤0.25;
- and
- a second compound, said second compound isostructurally substituting the first compound, and said second compound comprising Fe1±λMn1±μGe1±ν, wherein λ≤0.25, μ≤0.25, and ν≤0.25 and further comprising an element from the group consisting of B, C, N, P, S, As and H, the element from the group consisting of B, C, N, P, S, As and H comprising not more than 15% by mass of the alloy.
An alloy consisting of
- a first compound, said first compound comprising Mn1±αNi1±βSi1±γ, wherein α≤0.25, β≤0.25, and γ≤0.25;
- and
- a second compound, said second compound isostructurally substituting the first compound, and said second compound comprising Co1±λFe1±μGe1±ν wherein λ≤0.25, μ≤0.25, and ν≤0.25.
An alloy consisting of
- a first compound, said first compound comprising Mn1±αNi1±βSi1±γ, wherein α≤0.25, β≤0.25, and γ≤0.25;
- and
- a second compound, said second compound isostructurally substituting the first compound, and said second compound comprising Co1±αFe1±μGe1±ν wherein λ≤0.25, μ≤0.25, and ν≤0.25 and further comprising an element from the group consisting of B, C, N, P, S, As and H, the element from the group consisting of B, C, N, P, S, As and H comprising not more than 15% by mass of the alloy.
Dependencies are inferred from the claim text.