Origin of the Giant Negative Thermal Expansion in Mn₃(Cu_0.5Ge_0.5)N

Table 1

Exchange parameters (meV) for Mn₃CuN and Mn₃(Cu_0.5Ge_0.5)N compounds.

Compound	𝐽1	𝐽2	𝐽^′2
Mn3CuN	−7.5	22.5	−4.9
Mn3(Cu0.5Ge0.5)N	−19.90	20.3	−8.8