Speaker
Description
Thanks to the specific electronic structure the rare earth-based compounds, especially
those containing Yb, Ce or Eu, often exhibit exceptional magnetic properties. In our study we
have focused on cerium-based compound Ce 2 Pd 2 In belonging to the family of R 2 T 2 X
compounds crystallizing in tetragonal Mo 2 FeB 2 -type structure. Previous studies revealed
presence of two magnetic phase transitions (�� C ≈ 4.1 K and �� N ≈ 4.5 K) and strong dependence
of magnetic ground state on the changes of chemical composition [Giovannini,
PhysRevB2000].
We present the pressure-temperature phase diagrams both for hydrostatic and uniaxial
pressure. Hydrostatic pressure acts in the same way on the whole lattice, while the uniaxial
one allows to act solely in the chosen direction. The results are put into context with
temperature evolution of crystal lattice investigated by low temperature X-ray diffraction.
Based on these results, hydrostatic pressure is supposed to act more on the a-parameter, which
leads to approaching of atoms in the basal plane, affecting the exchange interactions in the
system and preference antiferromagnetic phase over the ferromagnetic one. On the other
hand, the uniaxial pressure acts on the parameter c showing no significant effect on the
temperatures of phase transition.
