Multiferroic behaviour of epitaxial NiFe2O4--BaTiO3 heterostructures

doi:10.1088/1674-1056/17/10/059

Abstract

Abstract Multiferroic NiFe₂O₄--BaTiO₃ (BTO) bilayered thin films are epitaxially grown on (001) Nb-doped SrTiO$_{3}$ (STO) substrates by pulsed-laser deposition (PLD). Different growth sequences of NFO and BTO on the substrate yield two kinds of epitaxial heterostructures with (001)-orientation, i.e. (001)-NFO/(001)-BTO/substrate and (001)-BTO/(001)-NFO/substrate. Microstructure studies from x-ray diffraction (XRD) and electron microscopies show differences between these two heterostructures, which result in different multiferroic behaviours. The heterostructured composite films exhibit good coexistence of both ferroelectric and ferromagnetic properties, in particular, obvious magnetoelectric (ME) effect on coupling response.

Keywords: magnetoelectric effect epitaxial heterostructure nickel ferrite multiferroics

Received: 17 September 2007
Revised: 24 October 2008
Accepted manuscript online:

PACS:	75.80.+q	(Magnetomechanical effects, magnetostriction)
	77.55.+f
	81.15.Fg	(Pulsed laser ablation deposition)
	75.70.Cn	(Magnetic properties of interfaces (multilayers, superlattices, heterostructures))

Fund: Project supported by the State Key Development Program for Basic Research of China (Grant No 2002CB613303) and the National High Technology Research and Development Program for Advanced Materials of China (Grant No 2006AA03Z101) and the National Natural Science Foundation of China (Grant Nos 10574078 and 50621201).

Cite this article:

Zhang Yi(张毅), Deng Chao-Yong(邓朝勇), Ma Jing(马静), Lin Yuan-Hua(林元华), and Nan Ce-Wen(南策文) Multiferroic behaviour of epitaxial NiFe₂O₄--BaTiO₃ heterostructures 2008 Chin. Phys. B 17 3910

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Multiferroic behaviour of epitaxial NiFe2O4--BaTiO3 heterostructures

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Multiferroic behaviour of epitaxial NiFe₂O₄--BaTiO₃ heterostructures