Controlling Self-Assembled Perovskite−Spinel Nanostructures

Zheng, Haimei; Zhan, Qian; Zavaliche, F.; Sherburne, Matt; Straub, Florian; Cruz, M. P.; Chen, Lei; Dahmen, U.; Ramesh, R.

doi:10.1021/nl060401y

Cited by 264 publications

(306 citation statements)

References 31 publications

(44 reference statements)

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“…X-ray diffraction (Fig. 1c) 15 . To avoid the impression that the in-plane crystallographic axes of the CFO nanopillars could be rotated with respect to the ones of BTO, the unit cell orientation of CFO is depicted in the schematic figures in this work.…”

Section: Resultsmentioning

confidence: 99%

Electric in-plane polarization in multiferroic CoFe2O4/BaTiO3 nanocomposite tuned by magnetic fields

et al. 2013

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Ferrimagnetic CoFe 2 O 4 nanopillars embedded in a ferroelectric BaTiO 3 matrix are an example for a two-phase magnetoelectrically coupled system. They operate at room temperature and are free of any resource-critical rare-earth element, which makes them interesting for potential applications. Prior studies succeeded in showing strain-mediated coupling between the two subsystems. In particular, the electric properties can be tuned by magnetic fields and the magnetic properties by electric fields. Here we take the analysis of the coupling to a new level utilizing soft X-ray absorption spectroscopy and its associated linear dichroism. We demonstrate that an in-plane magnetic field breaks the tetragonal symmetry of the (1,3)-type CoFe 2 O 4 /BaTiO 3 structures and discuss it in terms of off-diagonal magnetostrictive-piezoelectric coupling. This coupling creates staggered in-plane components of the electric polarization, which are stable even at magnetic remanence due to hysteretic behaviour of structural changes in the BaTiO 3 matrix. The competing mechanisms of clamping and relaxation effects are discussed in detail.

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Section: Resultsmentioning

confidence: 99%

Electric in-plane polarization in multiferroic CoFe2O4/BaTiO3 nanocomposite tuned by magnetic fields

et al. 2013

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“…Experimentally, perovskite-spinel heterointerfaces are known to form spontaneously as a result of phase separation. 24 The interfacial planes of both materials in our model are negatively charged, giving rise to an excess negative charge that is compensated by oxygen vacancies in the space charge layer. Thus, the heterostructure maintains overall electrical neutrality and, at the same time, allows us to investigate different vacancy distributions next to the interface and determine specific interactions.…”

mentioning

confidence: 96%

First-principles study of compensation mechanisms in negatively charged LaGaO3/MgAl2O4interfaces

et al. 2013

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“…This also demonstrated the ME coupling by the nanoscale "product" effect and the converse ME coefficient was estimated to be 1.0×10 -2 G cm V -1 . In those 1−3 selfassembled spinel-perovskite systems, the nanostructures can be controlled by different substrate orientations [23]. For the BFO and CFO 1−3 nanocomposite, (001)-oriented STO substrates support the rectangular-shaped CFO nanopillars in BFO matrix, while (111)-oriented substrates can stabilize the triangular-shaped BFO nanopillars in CFO matrix.…”

Section: Strain Effectsmentioning

confidence: 99%

Magnetoelectric coupling across the interface of multiferroic nanocomposites

Yao

Lin

et al. 2015

Sci. China Mater.

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In recent decades, magnetoelectric effect in multiferroic materials has attracted extensive attention owing to the upcoming demands for new-generation multi-functional magnetoelectronic devices, such as transducer, sensor and so on. This gives people a strong push to explore the multiferroic materials with a reduced dimension and effective coupling between electric and magnetic orderings, especially at room temperature. Due to the weak magnetoelectric coupling strength in sing-phase multiferroic materials, scientists start to design nanocomposites and artificial nanostructures with strong coupling among order parameters (lattice, charge, spin and orbital). In this review, we will introduce recent major progresses of magnetoelectric coupling in multiferroic nanocomposites across their interfaces from the following four aspects: strain effect, charge transfer, magnetic exchange interaction and orbital hybridization, based on their coupling mechanisms. Through a full understanding of the above coupling among these orderings, it is possible to achieve the nanoscale modulation of magnetization (ferroelectric polarization) by external electric (magnetic) field. Apart from the magnetoelectric coupling, those artificially functional nanocomposites provide us a platform to explore and study the emerging physical phenomena so that we can design self-assembled nanostructures to tailor novel functionalities in future applications.

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Controlling Self-Assembled Perovskite−Spinel Nanostructures

Cited by 264 publications

References 31 publications

Electric in-plane polarization in multiferroic CoFe2O4/BaTiO3 nanocomposite tuned by magnetic fields

Electric in-plane polarization in multiferroic CoFe2O4/BaTiO3 nanocomposite tuned by magnetic fields

First-principles study of compensation mechanisms in negatively charged LaGaO3/MgAl2O4interfaces

Magnetoelectric coupling across the interface of multiferroic nanocomposites

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