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Title: Flexible Multiferroic Bulk Heterojunction with Giant Magnetoelectric Coupling via van der Waals Epitaxy

Journal Article · · ACS Nano
 [1];  [2];  [3];  [4];  [2];  [5];  [6];  [7]; ORCiD logo [8];  [5];  [7];  [4];  [3];  [1]; ORCiD logo [9]
  1. National Chiao Tung Univ., Hsinchu (Taiwan). Dept. of Electrophysics
  2. National Chiao Tung Univ., Hsinchu (Taiwan). Dept. of Materials Science and Engineering
  3. Seoul National Univ. (Korea, Republic of). Dept. of Physics and Astronomy. CeNSCMR
  4. Pennsylvania State Univ., University Park, PA (United States). Dept. of Materials Science and Engineering
  5. National Cheng Kung Univ., Tainan (Taiwan). Dept. of Physics
  6. National Chung Hsing Univ., Taichung (Taiwan). Dept. of Materials Science and Engineering
  7. Academia Sinica, Taipei (Taiwan). Inst. of Physics
  8. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials
  9. National Chiao Tung Univ., Hsinchu (Taiwan). Dept. of Electrophysics. Dept. of Materials Science and Engineering; Academia Sinica, Taipei (Taiwan). Inst. of Physics; Industrial Technology Research Inst., Hsinchu (Taiwan). Material and Chemical Research Lab.

Magnetoelectric nanocomposites have been a topic of intense research due to their profound potential in the applications of electronic devices based on spintronic technology. Nevertheless, in spite of significant progress made in the growth of high-quality nanocomposite thin films, the substrate clamping effect still remains a major hurdle in realizing the ultimate magnetoelectric coupling. To overcome this obstacle, an alternative strategy of fabricating a self-assembled ferroelectric–ferrimagnetic bulk heterojunction on a flexible muscovite via van der Waals epitaxy is adopted. In this paper, we investigated the magnetoelectric coupling in a self-assembled BiFeO3 (BFO)–CoFe2O4 (CFO) bulk heterojunction epitaxially grown on a flexible muscovite substrate. The obtained heterojunction is composed of vertically aligned multiferroic BFO nanopillars embedded in a ferrimagnetic CFO matrix. Moreover, due to the weak interaction between the flexible substrate and bulk heterojunction, the interface is incoherent and, hence, the substrate clamping effect is greatly reduced. The phase-field simulation model also complements our results. The magnetic and electrical characterizations highlight the improvement in magnetoelectric coupling of the BFO–CFO bulk heterojunction. A magnetoelectric coupling coefficient of 74 mV/cm·Oe of this bulk heterojunction is larger than the magnetoelectric coefficient reported earlier on flexible substrates. Finally and therefore, this study delivers a viable route of fabricating a remarkable magnetoelectric heterojunction and yet flexible electronic devices that are robust against extreme conditions with optimized performance.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Pennsylvania State Univ., University Park, PA (United States); National Chiao Tung Univ., Hsinchu (Taiwan); Seoul National Univ. (Korea, Republic of)
Sponsoring Organization:
USDOE; National Science Foundation (NSF); Ministry of Science and Technology (Taiwan); Seoul National Univ. (Korea, Republic of)
Contributing Organization:
Academia Sinica, Taipei (Taiwan); National Cheng Kung Univ., Tainan (Taiwan); National Chung Hsing Univ., Taichung (Taiwan); Industrial Technology Research Inst., Hsinchu (Taiwan)
Grant/Contract Number:
SC0012704; DMR-1410714; MOST 103-2112-M-009-015-MY3; MOST 104-2628-E-009-005-MY2; MOST 104-2923-M-009-005-MY2; 2010-0018300; 0409-20150111
OSTI ID:
1368662
Report Number(s):
BNL-113969-2017-JA; R&D Project: 16060; 16060; KC0403020
Journal Information:
ACS Nano, Vol. 11, Issue 6; ISSN 1936-0851
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 99 works
Citation information provided by
Web of Science

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Integration of bulk materials with two-dimensional materials for physical coupling and applications journal May 2019
Progress in BiFeO 3 -based heterostructures: materials, properties and applications journal January 2020
van der Waals epitaxy for highly tunable all-inorganic transparent flexible ferroelectric luminescent films journal January 2019
Development of oxide heteroepitaxy for soft technology journal January 2018
Photovoltaic, photo-impedance, and photo-capacitance effects of the flexible (111) BiFeO 3 film journal September 2019
Metal Oxide Nanocomposites: A Perspective from Strain, Defect, and Interface journal October 2018
Enhanced bending-tuned magnetic properties in epitaxial cobalt ferrite nanopillar arrays on flexible substrates journal January 2018
Recent progress on the fabrication and applications of flexible ferroelectric devices journal January 2020
Mechanically controlled reversible photoluminescence response in all-inorganic flexible transparent ferroelectric/mica heterostructures journal September 2019
Giant magnetoelectric effects in pseudo 1–3 heterostructure films with FeGa nanocluster-assembled micron-scale discs embedded into Bi 5 Ti 3 FeO 15 matrices journal January 2018
Development of magnetoelectric nanocomposite for soft technology journal May 2018
Electrically driven lasers from van der Waals heterostructures journal January 2018
Atomic Scale Understanding of the Epitaxy of Perovskite Oxides on Flexible Mica Substrate journal December 2019
The magnetoelectric effect in a cubic ferrimagnetic spinel LiFe 5 O 8 with high coupling temperature journal January 2019
Effects of pillar size modulation on the magneto-structural coupling in self-assembled BiFeO 3 –CoFe 2 O 4 heteroepitaxy journal January 2020