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Title: Interfacial Coupling-Induced Ferromagnetic Insulator Phase in Manganite Film

Abstract

Interfaces with subtle differences in atomic and electronic structures in perovskite ABO3 heterostructures often yield intriguingly different properties, yet their exact roles remain elusive. Here, we report an integrated study of unusual transport, magnetic, and structural properties of Pr0.67Sr0.33MnO3 film on SrTiO3 substrate. The variations in the out-of-plane lattice constant and BO6 octahedral rotation across the Pr0.67Sr0.33MnO3/SrTiO3 interface strongly depend on the thickness of the Pr0.67Sr0.33MnO3 film. In the 12-nm film, a new interface-sensitive ferromagnetic polaronic insulator (FI') phase is formed during the cubic-to-tetragonal phase transition of SrTiO3, apparently due to the enhanced electron–phonon interaction and atomic disorder in the film. The transport properties of the FI' phase in the 30-nm film are masked because of the reduced interfacial coupling and smaller interface-to-volume ratio. In conclusion, this work demonstrates how thickness-dependent interfacial coupling leads to the formation of a theoretically predicted ferromagnetic–polaronic insulator, as illustrated in a new phase diagram, that is otherwise ferromagnetic metal (FM) in bulk form.

Authors:
 [1];  [2];  [2];  [3];  [4];  [5];  [2];  [2];  [1]
  1. National Univ. of Singapore (Singapore). Dept. of Materials Science & Engineering
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics & Materials Science Division
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  4. National Univ. of Singapore (Singapore). Singapore Synchrotron Light Source (SSLS)
  5. National Univ. of Singapore (Singapore). NUSNNI-Nanocore; National Univ. of Singapore (Singapore). Dept. of Physics; National Univ. of Singapore (Singapore). Dept. of Electrical & Computer Engineering
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1336225
Report Number(s):
BNL-113256-2016-JA
Journal ID: ISSN 1530-6984; R&D Project: MA015MACA; KC0201010
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Nano Letters
Additional Journal Information:
Journal Volume: 16; Journal Issue: 7; Journal ID: ISSN 1530-6984
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ferromagnetic insulator phase; Interfacial coupling; perovskite; STEM; thickness dependence

Citation Formats

Zhang, Bangmin, Wu, Lijun, Yin, Wei-Guo, Sun, Cheng-Jun, Yang, Ping, Venkatesan, T., Chen, Jingsheng, Zhu, Yimei, and Chow, Gan Moog. Interfacial Coupling-Induced Ferromagnetic Insulator Phase in Manganite Film. United States: N. p., 2016. Web. https://doi.org/10.1021/acs.nanolett.6b01056.
Zhang, Bangmin, Wu, Lijun, Yin, Wei-Guo, Sun, Cheng-Jun, Yang, Ping, Venkatesan, T., Chen, Jingsheng, Zhu, Yimei, & Chow, Gan Moog. Interfacial Coupling-Induced Ferromagnetic Insulator Phase in Manganite Film. United States. https://doi.org/10.1021/acs.nanolett.6b01056
Zhang, Bangmin, Wu, Lijun, Yin, Wei-Guo, Sun, Cheng-Jun, Yang, Ping, Venkatesan, T., Chen, Jingsheng, Zhu, Yimei, and Chow, Gan Moog. Wed . "Interfacial Coupling-Induced Ferromagnetic Insulator Phase in Manganite Film". United States. https://doi.org/10.1021/acs.nanolett.6b01056. https://www.osti.gov/servlets/purl/1336225.
@article{osti_1336225,
title = {Interfacial Coupling-Induced Ferromagnetic Insulator Phase in Manganite Film},
author = {Zhang, Bangmin and Wu, Lijun and Yin, Wei-Guo and Sun, Cheng-Jun and Yang, Ping and Venkatesan, T. and Chen, Jingsheng and Zhu, Yimei and Chow, Gan Moog},
abstractNote = {Interfaces with subtle differences in atomic and electronic structures in perovskite ABO3 heterostructures often yield intriguingly different properties, yet their exact roles remain elusive. Here, we report an integrated study of unusual transport, magnetic, and structural properties of Pr0.67Sr0.33MnO3 film on SrTiO3 substrate. The variations in the out-of-plane lattice constant and BO6 octahedral rotation across the Pr0.67Sr0.33MnO3/SrTiO3 interface strongly depend on the thickness of the Pr0.67Sr0.33MnO3 film. In the 12-nm film, a new interface-sensitive ferromagnetic polaronic insulator (FI') phase is formed during the cubic-to-tetragonal phase transition of SrTiO3, apparently due to the enhanced electron–phonon interaction and atomic disorder in the film. The transport properties of the FI' phase in the 30-nm film are masked because of the reduced interfacial coupling and smaller interface-to-volume ratio. In conclusion, this work demonstrates how thickness-dependent interfacial coupling leads to the formation of a theoretically predicted ferromagnetic–polaronic insulator, as illustrated in a new phase diagram, that is otherwise ferromagnetic metal (FM) in bulk form.},
doi = {10.1021/acs.nanolett.6b01056},
journal = {Nano Letters},
number = 7,
volume = 16,
place = {United States},
year = {2016},
month = {6}
}

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