Emerging single-phase state in small manganite nanodisks

Jian Shao, Hao Liu, Kai Zhang, Yang Yu, Weichao Yu, Hanxuan Lin, Jiebin Niu, Kai Du, Yunfang Kou, Wengang Wei, Fanli Lan, Yinyan Zhu, Wenbin Wang, Jiang Xiao, E. W. Plummer, Lifeng Yin, Jian Shen

研究成果: Article査読

16 被引用数 (Scopus)


In complex oxides systems such as manganites, electronic phase separation (EPS), a consequence of strong electronic correlations, dictates the exotic electrical and magnetic properties of these materials. A fundamental yet unresolved issue is how EPS responds to spatial confinement; will EPS just scale with size of an object, or will the one of the phases be pinned? Understanding this behavior is critical for future oxides electronics and spintronics because scaling down of the system is unavoidable for these applications. In this work, we use La0.325Pr0.3Ca0.375MnO3 (LPCMO) single crystalline disks to study the effect of spatial confinement on EPS. The EPS state featuring coexistence of ferromagnetic metallic and charge order insulating phases appears to be the low- Temperature ground state in bulk, thin films, and large disks, a previously unidentified ground state (i.e., a single ferromagnetic phase state emerges in smaller disks). The critical size is between 500 nm and 800 nm, which is similar to the characteristic length scale of EPS in the LPCMO system. The ability to create a pure ferromagnetic phase in manganite nanodisks is highly desirable for spintronic applications.

ジャーナルProceedings of the National Academy of Sciences of the United States of America
出版ステータスPublished - 2016 8 16

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