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The identification of materials supporting complex, tunable magnetic order atambient temperatures is foundational to the development of new magnetic devicearchitectures. We report the design of Mn2XY tetragonal inverse Heusler alloysthat are capable of hosting magnetic antiskyrmions whose stability is sensitiveto elastic strain. We first construct a universal magnetic Hamiltoniancapturing the short- and long- range magnetic order which can be expected inthese materials. This model reveals critical combinations of magneticinteractions that are necessary to approach a magnetic phase boundary, wherethe magnetic structure is highly susceptible to small perturbations such aselastic strain. We then computationally search for quaternary Mn2(X1,X2)Yalloys where these critical interactions may be realized and which are likelyto be synthesizable in the inverse Heusler structure. We identify theMn2Pt(1-z)X(z)Ga family of materials with X=Au, Ir, Ni as an ideal system foraccessing all possible magnetic phases, with several critical compositionswhere magnetic phase transitions may be actuated mechanically.

Tuning magnetic antiskyrmion stability in tetragonal inverse Heusler alloys