High-resolution x-ray absorption spectroscopy of BaTiO<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>3</mml:mn></mml:msub></mml:math>: Experiment and first-principles calculations

Chassé, A.; Borek, Stephan; Schindler, K.‐M.; Trautmann, Martin; Huth, Michael; Steudel, Franziska; Makhova, L.; Gräfe, Joachim; Denecke, R.

doi:10.1103/physrevb.84.195135

Cited by 32 publications

(20 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…2, whereas D s takes into account the deviation CFO (004) BTO (002) STO (002) BTO (003) STO (003) BTO (004) CFO (008) STO ( ARTICLE from a cubic symmetry including the displacement of the Ti 4 þ ion. The best fit to experimental data was obtained for the crystal field parameters 10D q ¼ 2.0 eV, in agreement with de Groot et al 20 and Chassé et al 21 , and D s ¼ À 0.04 eV. Note that the XANES is not very sensitive to changes of D s , whereas the XLD strongly depends on this value and vanishes for D s ¼ 0.…”

Section: Resultssupporting

confidence: 74%

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

et al. 2013

View full text Add to dashboard Cite

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.

show abstract

Section: Resultssupporting

confidence: 74%

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

et al. 2013

View full text Add to dashboard Cite

show abstract

“…We use the cubic BTO powder as a reference to assign peaks. 29 − 31 Peaks A–E correspond to the electronic excitation from O 1s states to several unoccupied states in the conduction band. Peak A indicates a transition from O 1s to O 2p–Ti 3d hybridized states, linking it to the t 2 g crystal field peak.…”

mentioning

confidence: 99%

Relating Electronic and Geometric Structure of Atomic Layer Deposited BaTiO₃ to its Electrical Properties

Torgersen¹,

Acharya²,

Dadlani³

et al. 2016

J. Phys. Chem. Lett.

View full text Add to dashboard Cite

Atomic layer deposition allows the fabrication of BaTiO3 (BTO) ultrathin films with tunable dielectric properties, which is a promising material for electronic and optical technology. Industrial applicability necessitates a better understanding of their atomic structure and corresponding properties. Through the use of element-specific X-ray absorption near edge structure (XANES) analysis, O K-edge of BTO as a function of cation composition and underlying substrate (RuO2 and SiO2) is revealed. By employing density functional theory and multiple scattering simulations, we analyze the distortions in BTO’s bonding environment captured by the XANES spectra. The spectral weight shifts to lower energy with increasing Ti content and provides an atomic scale (microscopic) explanation for the increase in leakage current density. Differences in film morphologies in the first few layers near substrate–film interfaces reveal BTO’s homogeneous growth on RuO2 and its distorted growth on SiO2. This work links structural changes to BTO thin-film properties and provides insight necessary for optimizing future BTO and other ternary metal oxide-based thin-film devices.

show abstract

“…4(a), 5(a) and 5(c), respectively. Starting with the Ti L 2,3 edges, we first simulated the XAS with Ti 4+ tetragonal symmetry using values from previous studies [55] [ Fig. 6(a)].…”

Section: Usingmentioning

confidence: 99%

Interfacial room temperature magnetism and enhanced magnetocaloric effect in strained La0.66Ca0.34MnO3/BaTiO3 heterostructures

et al. 2017

View full text Add to dashboard Cite

We present a modification of the magnetization and an electronic reconfiguration due to interfacial coupling between strain relaxed La 0.66 Ca 0.34 MnO 3 and ultrathin BaTiO 3 films using the magnetocaloric effect and photoemission electron microscopy at the Mn, Ti L 2,3 edges. The addition of a top BaTiO 3 layer leads to strain-induced enhancement of the magnetocaloric effect in La 0.66 Ca 0.34 MnO 3 , due to the structural transitions in BaTiO 3 , and to room temperature ferromagnetism due to electronic reconfiguration at the interface.

show abstract

High-resolution x-ray absorption spectroscopy of BaTiO3: Experiment and first-principles calculations

Cited by 32 publications

References 42 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

Relating Electronic and Geometric Structure of Atomic Layer Deposited BaTiO₃ to its Electrical Properties

Interfacial room temperature magnetism and enhanced magnetocaloric effect in strained La0.66Ca0.34MnO3/BaTiO3 heterostructures

Contact Info

Product

Resources

About

High-resolution x-ray absorption spectroscopy of BaTiO3: Experiment and first-principles calculations

Cited by 32 publications

References 42 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

Relating Electronic and Geometric Structure of Atomic Layer Deposited BaTiO3 to its Electrical Properties

Interfacial room temperature magnetism and enhanced magnetocaloric effect in strained La0.66Ca0.34MnO3/BaTiO3 heterostructures

Contact Info

Product

Resources

About

Relating Electronic and Geometric Structure of Atomic Layer Deposited BaTiO₃ to its Electrical Properties