A Study of the PreEdge XRay Absorption Fine Structures in Ni Monoxide

Li, Sj; Wu, ZY; Hu, TD; Xie, Yn; Zhang, J; Liu, T; Natoli, C. R.; Paris, Eleonora; Marcelli, A.

doi:10.1238/physica.topical.115a00223

Cited by 3 publications

(1 citation statement)

References 2 publications

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“…The Ni has the expected octahedral coordination with a Ni coordination environment as observed before in an epitaxial NiTiO 3 film. [11] Similar spectral features were observed before for octahedral Ni in nickel monoxide by Li et al [40], and in K 0.8 Ni 0.4 Ti 1.6 O 4 , a Ni-containing hydronium intercalate, and NiO by Paek et al [41]. Fig.…”

Section: Influence Of Film Thickness On Strain and Film Propertiessupporting

confidence: 81%

Strain-dependence of the structure and ferroic properties of epitaxial Ni1−xTi1−yO3 thin films grown on sapphire substrates

et al. 2015

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Polarization-induced weak ferromagnetism has been predicted a few years back in compounds MTiO 3 (M = Fe, Mn, Ni) (Fennie, 2008). We set out to stabilize this metastable, distorted perovskite structure by growing NiTiO 3 epitaxially on sapphire Al 2 O 3 (001) substrate, and to control the polar and magnetic properties via strain. Epitaxial Ni 1 − x Ti 1 − y O 3 films of different Ni/Ti ratios and thicknesses were deposited on Al 2 O 3 substrates by pulsed laser deposition at different temperatures, and characterized using several techniques. The effect of film thickness, deposition temperature, and film stoichiometry on lattice strain, film structure, and physical properties was investigated. Our structural data from x-ray diffraction, electron microscopy, and x-ray absorption spectroscopy shows that substrate-induced strain has a marked effect on the structure and crystalline quality of the films. Physical property measurements reveal a dependence of the Néel transition and lattice polarization on strain, and highlight our ability to control the ferroic properties in NiTiO 3 thin films by film stoichiometry and thickness.

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Section: Influence Of Film Thickness On Strain and Film Propertiessupporting

confidence: 81%

Strain-dependence of the structure and ferroic properties of epitaxial Ni1−xTi1−yO3 thin films grown on sapphire substrates

et al. 2015

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Epitaxial growth of NiTiO3 with a distorted ilmenite structure

et al. 2012

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Intrinsic charge transfer gap in NiO fromNi K-edge x-ray absorption spectroscopy

et al. 2009

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Pre-edge features in X-ray absorption spectroscopy contain key information about the lowest excited states and thus on the most interesting physical properties of the system. In transition metal oxides they are particularly structured but extracting physical parameters by comparison with a calculation is not easy due to several computational challenges. By combining core-hole attraction and correlation effects in first principles approach, we calculate Ni K-edge X-ray absorption spectra in NiO. We obtain a striking, parameter-free agreement with experimental data and show that dipolar pre-edge features above the correlation gap are due to non-local excitations largely unaffected by the core-hole. We show that in charge transfer insulators, this property can be used to measure the correlation gap and probe the intrinsic position of the upper-Hubbard band.PACS numbers:

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A Study of the PreEdge XRay Absorption Fine Structures in Ni Monoxide

Cited by 3 publications

References 2 publications

Strain-dependence of the structure and ferroic properties of epitaxial Ni1−xTi1−yO3 thin films grown on sapphire substrates

Strain-dependence of the structure and ferroic properties of epitaxial Ni1−xTi1−yO3 thin films grown on sapphire substrates

Epitaxial growth of NiTiO3 with a distorted ilmenite structure

Intrinsic charge transfer gap in NiO fromNi K-edge x-ray absorption spectroscopy

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