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ACS Appl Mater Interfaces. 2018 Jun 20;10(24):20712-20719. doi: 10.1021/acsami.8b05289. Epub 2018 Jun 12.

Multifield Control of Domains in a Room-Temperature Multiferroic 0.85BiTi0.1Fe0.8Mg0.1O3-0.15CaTiO3 Thin Film.

Author information

1
Shenzhen Key Laboratory of Nanobiomechanics , Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen , Guangdong 518055 , China.
2
National Institute for Materials Science , 1-2-1 Sengen , Tsukuba , Ibaraki 305-0047 , Japan.
3
Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, Department of Materials Science and Engineering , Wuhan Institute of Technology , 206 Guanggu first Road , Wuhan 430205 , China.
4
Department of Mechanical Engineering , University of Washington , Seattle , Washington 98195 , United States.
5
Electronic Materials Research Laboratory, Key Laboratory of The Ministry of Education & International Center for Dielectric Research , Xi'an Jiaotong University , Xi'an 710049 , China.
6
Institute for Computational Materials Science, School of Physics and Electronics , Henan University , Kaifeng 475004 , China.
7
Institute for Superconducting & Electronic Materials, University of Wollongong, Innovation Campus , North Wollongong , NSW 2500 , Australia.

Abstract

Single-phase materials that combine electric polarization and magnetization are promising for applications in multifunctional sensors, information storage, spintronic devices, etc. Following the idea of a percolating network of magnetic ions (e.g., Fe) with strong superexchange interactions within a structural scaffold with a polar lattice, a solid solution thin film with perovskite structure at a morphotropic phase boundary with a high level of Fe atoms on the B site of perovskite structure is deposited to combine both ferroelectric and ferromagnetic ordering at room temperature with magnetoelectric coupling. In this work, a 0.85BiTi0.1Fe0.8Mg0.1O3-0.15CaTiO3 thin film has been deposited by pulsed laser deposition (PLD). Both the ferroelectricity and the magnetism were characterized at room temperature. Large polarization and a large piezoelectric effective coefficient d33 were obtained. Multifield coupling of the thin film has been characterized by scanning force microscopy. Ferroelectric domains and magnetic domains could be switched by magnetic field ( H), electric field ( E), mechanical force ( F), and, indicating that complex cross-coupling exists among the electric polarization, magnetic ordering and elastic deformation in 0.85BiTi0.1Fe0.8Mg0.1O3-0.15CaTiO3 thin film at room temperature. This work also shows the possibility of writing information with electric field, magnetic field, and mechanical force and then reading data by magnetic field. We expect that this work will benefit information applications.

KEYWORDS:

domain switching; ferroelectricity; magnetism; morphotropic phase boundary; thin film

PMID:
29856919
DOI:
10.1021/acsami.8b05289

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