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Updated: Mar 23, 2026
Fabrication of Spatially Confined Complex Oxides
Published on: July 1, 2013
Chemical ordering suppresses large-scale electronic phase separation in doped manganites
Yinyan Zhu1, Kai Du1, Jiebin Niu1,2
1State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, China.
Abstract:
For strongly correlated oxides, it has been a long-standing issue regarding the role of the chemical ordering of the dopants on the physical properties. Here, using unit cell by unit cell superlattice growth technique, we determine the role of chemical ordering of the Pr dopant in a colossal magnetoresistant (La(1-y)Pr(y))(1-x)Ca(x)MnO3 (LPCMO) system, which has been well known for its large length-scale electronic phase separation phenomena. Our experimental results show that the chemical ordering of Pr leads to marked reduction of the length scale of electronic phase separations. Moreover, compared with the conventional Pr-disordered LPCMO system, the Pr-ordered LPCMO system has a metal-insulator transition that is ∼100 K higher because the ferromagnetic metallic phase is more dominant at all temperatures below the Curie temperature.
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