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Probing Multiferroic Heterostructures of BiFeO3-LiMn2O4 Using Magnetic, Piezoelectric and Piezomagnetic Force Microscopies

[+] Author Affiliations
Ahmadreza Eshghinejad, Qian Nataly Chen, Feiyue Ma, Jiangyu Li

University of Washington, Seattle, WA

Wen-I Liang, Ying-Hao Chu

National Chiao Tung University, Hsin Chu, Taiwan

Paper No. SMASIS2014-7513, pp. V001T01A014; 5 pages
doi:10.1115/SMASIS2014-7513
From:
  • ASME 2014 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
  • Volume 1: Development and Characterization of Multifunctional Materials; Modeling, Simulation and Control of Adaptive Systems; Structural Health Monitoring; Keynote Presentation
  • Newport, Rhode Island, USA, September 8–10, 2014
  • Conference Sponsors: Aerospace Division
  • ISBN: 978-0-7918-4614-8
  • Copyright © 2014 by ASME

abstract

In this study magnetic force microscopy (MFM), piezoresponse force microscopy (PFM), and the newly developed piezomagnetic force microscopy (PmFM) techniques are used to probe the ferroelectric and ferromagnetic properties of BiFeO3-LiMn2O4 (BFO-LMO) heterostructures at nano-scale. The PmFM technique is also used to probe the ferromagnetic properties of CoFe2O4 (CFO) as a case study. The PFM and PmFM mappings of the BFO-LMO heterostructures clearly distinguish the BFO matrix and LMO nanopillars while the MFM mapping is ambiguous. The relatively high piezomagnetic response of BFO matrix is believed to be due to the Mn doping while the piezoelectric-like response of LMO nanopillars is due to the ionic activities and the vertical geometry of its heterostructure. Lastly, limitations of the PmFM technique are discussed.

Copyright © 2014 by ASME

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