Structural properties and singular phase transitions of metallic Pr0.50Sr0.50CoO3 cobaltite.
The Pr0.50Sr0.50CoO3 perovskite exhibits unique magnetostructural properties among the rest of the ferromagnetic/metallic Ln0.50Sr0.50CoO3 compounds. Existing reports are largely controversial. We have determined and described its structural evolution, which follows the Pm3̅m → R3̅c → Imma → I4/mcm transformations. The structural changes have been thoroughly described. The results are confronted with distinct nonconventional properties and spin-lattice coupling effects in another half-doped cobaltite based on praseodymium, Pr0.50Ca0.50CoO3. The Imma →  I4/mcm symmetry change is responsible for the unexpected second magnetic transition.
Institut de Ciència de Materials de Barcelona, ICMAB-CSIC , Campus universitari de Bellaterra, E-08193 Bellaterra, Spain.
Jessica
J
Padilla-Pantoja
José Luis
JL
García-Muñoz
Bernat
B
Bozzo
Zdeněk
Z
Jirák
Javier
J
Herrero-Martín