Chemical ordering suppresses large-scale electronic phase separation in doped manganites

Yinyan Zhu, Kai Du, Jiebin Niu, Lingfang Lin, Wengang Wei, Hao Liu, Hanxuan Lin, Kai Zhang, Tieying Yang, Yunfang Kou, Jian Shao, Xingyu Gao, Xiaoshan Xu, Xiaoshan Wu, Shuai Dong (), Lifeng Yin () and Jian Shen ()
Additional contact information
Yinyan Zhu: Fudan University
Kai Du: Fudan University
Jiebin Niu: Fudan University
Lingfang Lin: Southeast University
Wengang Wei: Fudan University
Hao Liu: Fudan University
Hanxuan Lin: Fudan University
Kai Zhang: Fudan University
Tieying Yang: Shanghai Synchrotron Radiation Facility (SSRF)
Yunfang Kou: Fudan University
Jian Shao: Fudan University
Xingyu Gao: Shanghai Synchrotron Radiation Facility (SSRF)
Xiaoshan Xu: University of Nebraska-Lincoln
Xiaoshan Wu: Nanjing University
Shuai Dong: Southeast University
Lifeng Yin: Fudan University
Jian Shen: Fudan University

Nature Communications, 2016, vol. 7, issue 1, 1-6

Abstract: 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 (La1−yPry)1−xCaxMnO3 (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.

Date: 2016
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DOI: 10.1038/ncomms11260

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