The elastic constants and distance dependence of the magnetic interactions of Cr2O3

The six single crystal elastic stiffness constants of Cr₂O₃ have been determined at 20°C by a pulse-echo-overlap technique. The results are: c₁₁ = 3.74, c₁₂ = 1.48, c₁₃ = 1.75, c₃₃ = 3.62, c₄₄ = 1.59 and c₁₄ = 0.19 all in units of 10¹² dyne/cm². The magnetic anomalies in lattice parameters at 0 K were also determined. These results were used to approximately calculate the interatomic distance dependence of the magnetic interactions in Cr₂O₃.