Standard X-Ray Diffraction Powder Patterns of Sixteen Ceramic Phases

Wong‐Ng, W.; McMurdie, Howard F.; Paretzkin, Boris; Zhang, Yuming; Davis, Katherine L.; Hubbard, Camden R.; Dragoo, A. L.; Stewart, J. M.

doi:10.1017/s0885715600012690

Cited by 57 publications

(18 citation statements)

References 10 publications

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“…We can observe that all the curve peaks corresponds to the orthorhombic structure (Y-123 stoichiometric phase). The refinement of lattice parameters allows one to estimate the oxidation level close to 7 in the stoichiometric phase YBa Cu O [7]. The good quality of the obtained samples is confirmed by the electric resistance curve as a function of the temperature, shown in Fig.…”

Section: Resultsmentioning

confidence: 64%

Development of YBaCuO bulk superconductor for use as low magnetic field sensor

Oliveira¹,

Santos²,

Shigue³

et al. 2002

IEEE Trans. Appl. Supercond.

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Polycrystalline samples of nonoriented bulk YBaCuO superconducting specimens display high degree of disorder, semiconducting behavior in the normal state, and broad transition temperature. A regime explaining electrical and magnetic behaviors of high critical temperature superconductors called thermally activated flux flow (TAFF) presents a state in which vortex dynamic exhibits an ohmic behavior. The resistivity in this regime is proportional to the applied magnetic field for small current densities. In this work is presented a systematic study of the magnetoresistance as a function of the applied magnetic field in the range 5 to 100 Oe for polycrystalline samples with various thickness. Results of X-ray diffraction, resistivity as a function of the temperature, -characteristic curves and magnetoresistance are shown. The later result was fitted through an ad-hoc model showing good agreement in the 5 to 100 Oe magnetic field range.Index Terms-High-superconductor, magnetic field sensor, thermally-activated flux flow.

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Section: Resultsmentioning

confidence: 64%

Development of YBaCuO bulk superconductor for use as low magnetic field sensor

Oliveira¹,

Santos²,

Shigue³

et al. 2002

IEEE Trans. Appl. Supercond.

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“…The fits of the XRR measurements shown as black curves in Figure b reveal a hafnia thickness of 10.1 nm, roughness of 1.22 nm, and a relative density of 1.01 (assuming 9.68 g cm −3 for HfO 2 ) . The TiN thickness was fitted to be 45 nm and 298 nm with a roughness of 0.80 nm and a relative density of 1.01 (assuming 5.388 g cm −3 for TiN), respectively. Figure c shows an overview BF‐STEM micrograph of the TEM lamella (TiN300) confirming the XRR results.…”

Section: Resultsmentioning

confidence: 96%

Forming‐Free Grain Boundary Engineered Hafnium Oxide Resistive Random Access Memory Devices

Petzold

Zintler

Eilhardt

et al. 2019

Adv Elect Materials

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A model device based on an epitaxial stack combination of titanium nitride (111) and monoclinic hafnia (11true1¯) is grown onto a c‐cut Al2O3‐substrate to target the role of grain boundaries in resistive switching. The texture transfer results in 120° in‐plane rotated m‐HfO2 grains, and thus, in a defined subset of allowed grain boundary orientations of high symmetry. These engineered grain boundaries thread the whole dielectric layer, thereby providing predefined breakdown paths for electroforming‐free resistive random access memory devices. Combining X‐ray diffraction and scanning transmission electron microscopy (STEM)–based localized automated crystal orientation mapping (ACOM), a nanoscale picture of crystal growth and grain boundary orientation is obtained. High‐resolution STEM reveals low‐energy grain boundaries with facing (1¯1¯2¯) and (true1¯21) surfaces. The uniform distribution of forming voltages below 2 V—within the operation regime—and the stable switching voltages indicates reduced intra‐ and device‐to‐device variation in grain boundary engineered hafnium‐oxide‐based random access memory devices.

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“…Two kinds of luminescence have been investigated so far, rare-earth activated emission (laser applications) and self-activated emission in pure columbites. Rare-earth-doped luminescence materials such as Er 3+ : CdNb 2 O 6 are attractive because of their thermal and chemical stabilities (Erdem et al , 2014; Wong-Ng et al , 1987). CaNb 2 O 6 is a self-activated blue phosphor.…”

Section: Introductionmentioning

confidence: 99%

Crystal chemistry and X-ray diffraction patterns for Co(Ni_xZn_1−x)Nb₄O₁₂(x= 0.2, 0.4, 0.6, 0.8)

2016

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X-ray reference powder patterns and structures have been determined for a series of cobalt-, nickel- and zinc-containing niobates, Co(NixZn1−x)Nb4O12 (x = 0.2, 0.4, 0.6, 0.8). The Co(NixZn1−x)Nb4O12 series crystallize in the space group of Pbcn, which is of the disordered columbite-type structure (α-PbO2). The lattice parameters range from a = 14.11190(13) to 14.1569(3) Å, b = 5.69965(6) to 5.71209(13) Å, c = 5.03332(5) to 5.03673(11) Å, and V = 404.844(8) to 407.296(17) Å3 from x = 0.8 to 0.2, respectively. Co(NixZn1−x)Nb4O12 contains double zig-zag chains of NbO6 octahedra and single chain of (Ni,Zn,Co)O6 octahedra run parallel to the bc-plane. Within the same chain the NbO6 octahedra share edges, while the adjacent NbO6 chains are joined to each other through common oxygen corners. These double NbO6 chains are further linked together along the [100]-direction through another (Co,Ni,Zn)O6 units, via common oxygen corners. The edge-sharing (Co,Ni,Zn)O6 also forms zig-zag chains along the c-axis. Powder X-ray diffraction patterns of this series of compounds have been submitted to be included in the Powder Diffraction File.

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Standard X-Ray Diffraction Powder Patterns of Sixteen Ceramic Phases

Cited by 57 publications

References 10 publications

Development of YBaCuO bulk superconductor for use as low magnetic field sensor

Development of YBaCuO bulk superconductor for use as low magnetic field sensor

Forming‐Free Grain Boundary Engineered Hafnium Oxide Resistive Random Access Memory Devices

Crystal chemistry and X-ray diffraction patterns for Co(Ni_xZn_1−x)Nb₄O₁₂(x= 0.2, 0.4, 0.6, 0.8)

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Standard X-Ray Diffraction Powder Patterns of Sixteen Ceramic Phases

Cited by 57 publications

References 10 publications

Development of YBaCuO bulk superconductor for use as low magnetic field sensor

Development of YBaCuO bulk superconductor for use as low magnetic field sensor

Forming‐Free Grain Boundary Engineered Hafnium Oxide Resistive Random Access Memory Devices

Crystal chemistry and X-ray diffraction patterns for Co(NixZn1−x)Nb4O12(x= 0.2, 0.4, 0.6, 0.8)

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Crystal chemistry and X-ray diffraction patterns for Co(Ni_xZn_1−x)Nb₄O₁₂(x= 0.2, 0.4, 0.6, 0.8)