Comparison of interface structure of BCC metallic (Fe, V and Nb) films on MgO (100) substrate

Du, Jinlong; Zhang, L.Y.; Fu, Engang; Ding, Xiangdong; Kobayashi, Yu; Wang, Y.G.; Wang, Y.Q.; Baldwin, J. Kevin; Wang, X.J.; Xu, Peng

doi:10.1016/j.apsusc.2016.10.117

Cited by 12 publications

(8 citation statements)

References 46 publications

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“…This can be attributed to two factors as follows: (i) as the amount of Sm 3+ dopants increases, the lattice mismatch between NBST thin film and substrate increases from 1.36% to 1.49% caused by the lattice contraction, that would inhibit the grains grow and lead to decline in the degree of the grain‐orientation . The lattice mismatch (η) between NBST thin films and Pt substrate was calculated by the following formula:

η = \frac{2 | a_{t} - a_{s} false|}{a_{normalt} + a_{normals}}

where a t is the lattice constant of thin film and a s = 0.3923 nm is the lattice constant of substrate (Pt). (ii) Orientation of the NBST thin films is strongly precursor dependent .…”

Section: Resultsmentioning

confidence: 99%

Microstructural, ferroelectric, and photoluminescent properties of (100)‐oriented Sm³⁺‐doped Na_0.5Bi_0.5TiO₃ thin films

Huang

Ismail

et al. 2018

J Am Ceram Soc

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(100)C‐oriented Na0.5Bi0.5‐xSmxTiO3 (NBST) lead‐free ferroelectric thin films were prepared on Pt/Ti/SiO2/Si substrates by chemical solution deposition method, and their microstructural, dielectric, ferroelectric, and photoluminescent properties were studied. X‐ray diffraction and scanning electron microscopy analysis indicated that both the grain size and (100)C orientation degree of NBST thin films were decreased by doping Sm3+ ions. Raman spectra showed that structural symmetry of NBST thin films decreased at low Sm3+ doping concentration and then increased at high doping concentration of Sm3+ ions. An appropriate amount of Sm3+ dopants was confirmed to enhance dielectric and ferroelectric properties of the NBST thin films. Among all the compositions, the Na0.5Bi0.492Sm0.008TiO3 thin film exhibited the largest remnant polarization (2Pr) of 27.3 μC/cm2 and high dielectric constant of 1068, as well as a low dielectric loss of 0.04. Temperature‐ and frequency‐dependent dielectric characteristics illustrated the relaxor ferroelectric behavior of Na0.5Bi0.492Sm0.008TiO3 thin film. Meanwhile, the Na0.5Bi0.492Sm0.008TiO3 thin film also showed optimal orange‐red emission at 600 nm, which is originating from the 4G5/2 → 4H7/2 transition of Sm3+ ions.

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η = \frac{2 | a_{t} - a_{s} false|}{a_{normalt} + a_{normals}}

where a t is the lattice constant of thin film and a s = 0.3923 nm is the lattice constant of substrate (Pt). (ii) Orientation of the NBST thin films is strongly precursor dependent .…”

Section: Resultsmentioning

confidence: 99%

Microstructural, ferroelectric, and photoluminescent properties of (100)‐oriented Sm³⁺‐doped Na_0.5Bi_0.5TiO₃ thin films

Huang

Ismail

et al. 2018

J Am Ceram Soc

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“…At room temperature (RT, 300 K), the lattice constants of the body-centred cubic (bcc) structure of Fe, V atoms and the face-centred cubic (fcc) structure of MgO are 0.287 nm, 0.303 nm and 0.421 nm, respectively. Rotating the bcc structures of the Fe and V atoms by 45 • with respect to the MgO [100] axis, the lattice mismatches were reduced to ∼4% and 2% for bcc Fe-and V-layers, respectively [19]. The superlattices are noted as X(Fe)/Y(V) × Z, where X, Y and Z represent the number of MLs of iron and vanadium, and repetition periods, respectively.…”

Section: Methodsmentioning

confidence: 99%

Magnetic Structure and Strain State in Fe/V Superlattices Studied by 57Fe+ Emission and Conversion Electron Mössbauer Spectroscopy

et al. 2022

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The magnetic properties of the Fe/V superlattices were studied by conventional Conversion Electron Mössbauer Spectroscopy (CEMS) and online 57Fe+ emission Mössbauer Spectroscopy (eMS) at room temperature (RT) at ISOLDE/CERN. The unique depth-enhanced sensitivity and ultradiluted regime of the probe atoms adopted in this eMS facility enabled the investigation of the magnetic structures and the strain state in the superlattice layers and at the interfaces. The magnetic spectra of the superlattices were found to depend on both the local lattice environment and the strain state of the Fe-lattices. The magnetic polarisation in the V-layers or at the interfaces was not detected at RT. Spectral broadening was evident in the single line component of the eMS due to Fe ions substituted at V-lattice sites in the V-layers of the superlattice, attributable to the lattice strain in the V-layers. Our study demonstrate that with the online eMS technique the effects of the strain state of the superlattice on the magnetic properties of the Fe-layer in the Fe/V multilayer structures can be detected.

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“…The substrate was heated to and kept at 100 °C during deposition. The cross-sectional TEM (XTEM) specimens were prepared by dimpling and low energy (3.5 keV) Ar ion milling and subsequent ion polishing [ 24,25 ]. Before and after radiation, the specimen was investigated by an FEI Tecnai F20 microscope (FEI, Hillsboro, OR, USA).…”

Section: Methodsmentioning

confidence: 99%

Detwinning through migration of twin boundaries in nanotwinned Cu films under in situ ion irradiation

et al. 2018

Science and Technology of Advanced Materials

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The mechanism of radiation-induced detwinning is different from that of deformation detwinning as the former is dominated by supersaturated radiation-induced defects while the latter is usually triggered by global stress. In situ Kr ion irradiation was performed to study the detwinning mechanism of nanotwinned Cu films with various twin thicknesses. Two types of incoherent twin boundaries (ITBs), so-called fixed ITBs and free ITBs, are characterized based on their structural features, and the difference in their migration behavior is investigated. It is observed that detwinning during radiation is attributed to the frequent migration of free ITBs, while the migration of fixed ITBs is absent. Statistics shows that the migration distance of free ITBs is thickness and dose dependent. Potential migration mechanisms are discussed.

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Comparison of interface structure of BCC metallic (Fe, V and Nb) films on MgO (100) substrate

Cited by 12 publications

References 46 publications

Microstructural, ferroelectric, and photoluminescent properties of (100)‐oriented Sm³⁺‐doped Na_0.5Bi_0.5TiO₃ thin films

Microstructural, ferroelectric, and photoluminescent properties of (100)‐oriented Sm³⁺‐doped Na_0.5Bi_0.5TiO₃ thin films

Magnetic Structure and Strain State in Fe/V Superlattices Studied by 57Fe+ Emission and Conversion Electron Mössbauer Spectroscopy

Detwinning through migration of twin boundaries in nanotwinned Cu films under in situ ion irradiation

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Comparison of interface structure of BCC metallic (Fe, V and Nb) films on MgO (100) substrate

Cited by 12 publications

References 46 publications

Microstructural, ferroelectric, and photoluminescent properties of (100)‐oriented Sm3+‐doped Na0.5Bi0.5TiO3 thin films

Microstructural, ferroelectric, and photoluminescent properties of (100)‐oriented Sm3+‐doped Na0.5Bi0.5TiO3 thin films

Magnetic Structure and Strain State in Fe/V Superlattices Studied by 57Fe+ Emission and Conversion Electron Mössbauer Spectroscopy

Detwinning through migration of twin boundaries in nanotwinned Cu films under in situ ion irradiation

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Product

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Microstructural, ferroelectric, and photoluminescent properties of (100)‐oriented Sm³⁺‐doped Na_0.5Bi_0.5TiO₃ thin films

Microstructural, ferroelectric, and photoluminescent properties of (100)‐oriented Sm³⁺‐doped Na_0.5Bi_0.5TiO₃ thin films