Quadrupolar Response of DyIn₃

Abstract

The dysprosium indium compound DyIn 3 with the cubic AuCu 3-type structure shows an antiferromagnetic order at around T N = 20 K. We measured the elastic constants C 11 and C 44 in DyIn 3. The elastic softening toward T N and the Van-Vleck type behaviors below T N were observed. We analyzed the elastic properties by the crystal electric field theory corresponding the dipole-dipole interaction and the quadrupole-quadrupole interaction. The calculated results well represents the experimental behaviors.