Sulfide alloys that exhibit thermal bistability
AssigneeUniversity of Iowa Research Foundation
InventorsLee S. Martinson, John W. Schweitzer, Norman C. Baenziger
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Abstract
A new ternary sulfide alloy exhibits a metal-semiconductor phase transition with hysteresis as a function of temperature. One embodiment of the bistable material includes barium, cobalt, nickel and sulfur in amounts in accordance with the formula Ba(Co.sub.1-x Ni.sub.x)S.sub.2-y, and x is between 0 and 1 and y varies from 0 to 2.
Claims8
A thermally bistable material A(Co.sub.1-x M.sub.x)X.sub.2-y, where x is greater than 0 and less than 1, y is equal to or greater than 0 and less than 2, A is one element from either of group 1, group 2 or rare earth elements of the periodic table, M is a transition metal and X is one of S, Se and Te.
A thermally bistable material Ba(Co.sub.1-x Ni.sub.x)S.sub.2-y having a positive temperature coefficient, where x is greater than 0 and less than 0.25 and y is greater than or equal to 0 and less than or equal to 0.2.
Dependencies are inferred from the claim text.