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Title: Emerging single-phase state in small manganite nanodisks

Abstract

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 La 0.325Pr 0.3Ca 0.375MnO 3 (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.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [3];  [2]
  1. Fudan Univ., Shanghai (China)
  2. Fudan Univ., Shanghai (China); Collaborative Innovation Center of Advanced Microstructures, Nanjing (China)
  3. Louisiana State Univ., Baton Rouge, LA (United States)
Publication Date:
Research Org.:
Louisiana State Univ., Baton Rouge, LA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1436494
Grant/Contract Number:  
SC0002136
Resource Type:
Accepted Manuscript
Journal Name:
Proceedings of the National Academy of Sciences of the United States of America
Additional Journal Information:
Journal Volume: 113; Journal Issue: 33; Journal ID: ISSN 0027-8424
Publisher:
National Academy of Sciences, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Shao, Jian, Liu, Hao, Zhang, Kai, Yu, Yang, Yu, Weichao, Lin, Hanxuan, Niu, Jiebin, Du, Kai, Kou, Yunfang, Wei, Wengang, Lan, Fanli, Zhu, Yinyan, Wang, Wenbin, Xiao, Jiang, Yin, Lifeng, Plummer, E. W., and Shen, Jian. Emerging single-phase state in small manganite nanodisks. United States: N. p., 2016. Web. doi:10.1073/pnas.1609656113.
Shao, Jian, Liu, Hao, Zhang, Kai, Yu, Yang, Yu, Weichao, Lin, Hanxuan, Niu, Jiebin, Du, Kai, Kou, Yunfang, Wei, Wengang, Lan, Fanli, Zhu, Yinyan, Wang, Wenbin, Xiao, Jiang, Yin, Lifeng, Plummer, E. W., & Shen, Jian. Emerging single-phase state in small manganite nanodisks. United States. doi:10.1073/pnas.1609656113.
Shao, Jian, Liu, Hao, Zhang, Kai, Yu, Yang, Yu, Weichao, Lin, Hanxuan, Niu, Jiebin, Du, Kai, Kou, Yunfang, Wei, Wengang, Lan, Fanli, Zhu, Yinyan, Wang, Wenbin, Xiao, Jiang, Yin, Lifeng, Plummer, E. W., and Shen, Jian. Mon . "Emerging single-phase state in small manganite nanodisks". United States. doi:10.1073/pnas.1609656113. https://www.osti.gov/servlets/purl/1436494.
@article{osti_1436494,
title = {Emerging single-phase state in small manganite nanodisks},
author = {Shao, Jian and Liu, Hao and Zhang, Kai and Yu, Yang and Yu, Weichao and Lin, Hanxuan and Niu, Jiebin and Du, Kai and Kou, Yunfang and Wei, Wengang and Lan, Fanli and Zhu, Yinyan and Wang, Wenbin and Xiao, Jiang and Yin, Lifeng and Plummer, E. W. and Shen, Jian},
abstractNote = {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.},
doi = {10.1073/pnas.1609656113},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 33,
volume = 113,
place = {United States},
year = {2016},
month = {8}
}

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