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Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
Structural properties and singular phase transitions of metallic Pr0.50Sr0.50CoO3 cobaltite
Jessica Padilla-Pantoja1, José Luis García-Muñoz, Bernat Bozzo
1Institut de Ciència de Materials de Barcelona, ICMAB-CSIC , Campus universitari de Bellaterra, E-08193 Bellaterra, Spain.
Abstract:
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.
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