Quantitative determination of anisotropic magnetoelectric coupling in BiFeO3–CoFe2O4 nanostructures

Oh, Yoon Seok; Crane, S. P.; Zheng, Haimei; Chu, Ying Hao; Ramesh, R.; Kim, Kee Hoon

doi:10.1063/1.3475420

Cited by 64 publications

(66 citation statements)

References 17 publications

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“…In comparison with layered composite fi lms where there is clamping from stiff substrates, the 1-3 type vertical heterostructure consisting of a magnetic spinel nanopillars epitaxially embedded in the ferroelectric fi lm matrix could exhibit large direct ME response, [164][165][166][167] which is attributed to (1) a reduced clamping effect by the substrate in the vertical architecture, and (2) effi cient strain coupling resulting from a larger interfacial area and intrinsically heteroepitaxial in three dimensions. However, the direct ME response was not easy to be measured in the 1-3 type vertical heterostructures because of possible leakage problem resulting from low resistance of the magnetic pillars penetrating through the fi lm matrix.…”

Section: Approaches For Enhancing Direct Me Responsementioning

confidence: 99%

Recent Progress in Multiferroic Magnetoelectric Composites: from Bulk to Thin Films

Ma¹,

Hu²,

Li³

et al. 2011

Advanced Materials

1,733

915

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Multiferroic magnetoelectric composite systems such as ferromagnetic-ferroelectric heterostructures have recently attracted an ever-increasing interest and provoked a great number of research activities, driven by profound physics from coupling between ferroelectric and magnetic orders, as well as potential applications in novel multifunctional devices, such as sensors, transducers, memories, and spintronics. In this Review, we try to summarize what remarkable progress in multiferroic magnetoelectric composite systems has been achieved in most recent few years, with emphasis on thin films; and to describe unsolved issues and new device applications which can be controlled both electrically and magnetically.

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Section: Approaches For Enhancing Direct Me Responsementioning

confidence: 99%

Recent Progress in Multiferroic Magnetoelectric Composites: from Bulk to Thin Films

Ma¹,

Hu²,

Li³

et al. 2011

Advanced Materials

1,733

915

View full text Add to dashboard Cite

show abstract

“…The coexistence of ferroelectricity and ferromagnetism in BiFeO 3 -BaTiO 3 thin films at room temperature was reported already in 1999 [12]. More recently, the group around Ramesh combined the multiferroic BiFeO 3 with ferrimagnetic CoFe 2 O 4 in self-organized nanostructures with a 300-nm total thickness and obtained a transverse ME susceptibility of 60 mV/(cm·Oe) [13]. Muragavel et al .…”

Section: Introductionmentioning

confidence: 99%

Correlation of High Magnetoelectric Coupling with Oxygen Vacancy Superstructure in Epitaxial Multiferroic BaTiO3-BiFeO3 Composite Thin Films

et al. 2016

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Epitaxial multiferroic BaTiO3-BiFeO3 composite thin films exhibit a correlation between the magnetoelectric (ME) voltage coefficient αME and the oxygen partial pressure during growth. The ME coefficient αME reaches high values up to 43 V/(cm·Oe) at 300 K and at 0.25 mbar oxygen growth pressure. The temperature dependence of αME of the composite films is opposite that of recently-reported BaTiO3-BiFeO3 superlattices, indicating that strain-mediated ME coupling alone cannot explain its origin. Probably, charge-mediated ME coupling may play a role in the composite films. Furthermore, the chemically-homogeneous composite films show an oxygen vacancy superstructure, which arises from vacancy ordering on the {111} planes of the pseudocubic BaTiO3-type structure. This work contributes to the understanding of magnetoelectric coupling as a complex and sensitive interplay of chemical, structural and geometrical issues of the BaTiO3-BiFeO3 composite system and, thus, paves the way to practical exploitation of magnetoelectric composites.

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“…The lack of substrate clamping effect and the presence of large interfacial area in thick vertically aligned nanocomposite films in comparison with conventional horizontal heterostructures make such a new 3D architecture attractive20 to tune the functionalities of materials21. Experimentally, multiferroics and magnetoelectric couplings have been demonstrated in nanocomposite thin films consisting of ferromagnetic and ferroelectric oxides (e.g., BaTiO 3 :CoFe 2 O 4 , Pb(Zr 0.52 Ti 0.48 )O 3 -NiFe 2 O 4 , BiFeO 3 :CoFe 2 O 4 )2223242526. In addition, the vertical interface in composite films can show both enhanced electronic and ionic conductivities, which could be used for fast ion conducting channels in solid-oxide fuel cells2728.…”

mentioning

confidence: 99%

Evolution of microstructure, strain and physical properties in oxide nanocomposite films

Chen

Weigand

et al. 2014

Sci Rep

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We, using LSMO:ZnO nanocomposite films as a model system, have studied the effect of film thickness on the physical properties of nanocomposites. It shows that strain, microstructure, as well as magnetoresistance strongly rely on film thickness. The magnetotransport properties have been fitted by a modified parallel connection channel model, which is in agreement with the microstructure evolution as a function of film thickness in nanocomposite films on sapphire substrates. The strain analysis indicates that the variation of physical properties in nanocomposite films on LAO is dominated by strain effect. These results confirm the critical role of film thickness on microstructures, strain states, and functionalities. It further shows that one can use film thickness as a key parameter to design nanocomposites with optimum functionalities.

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Quantitative determination of anisotropic magnetoelectric coupling in BiFeO3–CoFe2O4 nanostructures

Abstract: The transverse and longitudinal magnetoelectric susceptibilities (MES) were quantitatively determined for (001) heteroepitaxial BiFeO 3 -CoFe 2 O 4 nanostructures. Both

Cited by 64 publications

References 17 publications

Recent Progress in Multiferroic Magnetoelectric Composites: from Bulk to Thin Films

Recent Progress in Multiferroic Magnetoelectric Composites: from Bulk to Thin Films

Correlation of High Magnetoelectric Coupling with Oxygen Vacancy Superstructure in Epitaxial Multiferroic BaTiO3-BiFeO3 Composite Thin Films

Evolution of microstructure, strain and physical properties in oxide nanocomposite films

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