Models for the modulation in A2B2CanCu1+nO6+2n, A, B=Bi, Sr OR Tl, Ba and n=0, 1, 2

Zandbergen, H.W.; Groen, W.A.; Mijlhoff, F.C.; Tendeloo, Gustaaf Van; Amelinckx, S.

doi:10.1016/0921-4534(88)90756-3

Cited by 363 publications

(43 citation statements)

References 25 publications

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“…From the DPs along the [001] zone axis, we can see that all the La-Bi2201 samples have such satellite spots corresponding to the anti-phase structure and the modulus of the vector q 2 exactly equals to half of corresponding component of q 1 along b * direction in the entire doping range from x=0.25 to 1.10 samples. Table 1 [12]. It is worth mentioning that the pristine Bi2201 only shows q 1 superstructure modulation without any indication of q 2 .…”

Section: La-doped Bi2201mentioning

confidence: 92%

“…An incommensurate superstructure in the bc plane has been identified by many high-resolution TEM (HRTEM) and electron diffraction studies (in [13], the modulation vector is q 1 ≈0.217b * +0.62c * ). The origin of this supermodulation is mainly attributed to the distortions of the BiO bilayers [12,16,17]. Substitutions in Bi or Sr sites usually modify the distortions of the BiO bilayers, and may lead to a change of the modulation vector q 1 .…”

Section: Introductionmentioning

confidence: 99%

“…There have been several TEM studies on La-Bi2201 with different compositions. In [12], the electron diffraction patterns (DPs) of Bi 2 Sr 2-x La x CuO 6 showed an increase of the b-component of the modulation vector, from 0.213b * for x=0 to 0.294b * for x=1. However, they only gave DPs along the [100] zone axis but did not provide DPs along the [001] zone axis which are more closely related to the CuO 2 planes.…”

Section: Introductionmentioning

confidence: 99%

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Compositional evolution of the anti-phase stripe superstructure in Bi₂Sr_2−xLa_xCuO₆(0 <x≤ 1.1) revealed by transmission electron microscopy

Chen¹,

Peng²,

Wang³

et al. 2013

Supercond. Sci. Technol.

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The detailed structural properties of La-doped Bi 2 Sr 2-x La x CuO 6 (La-Bi2201, 0≤x≤1.1) have been studied by transmission electron microscopy (TEM). The well-known incommensurate supermodulation q 1 in the Bi-based cuprates evolves from a monoclinic superstructure in the pristine Bi2201 phase to an orthogonal one in La-Bi2201(x=0.73) phase. The b-component of the modulation vector (q 1 ) for x=0.25 sample is about 0.24b * and increases slightly to 0.246b * in x=0.84 sample, while it increases significantly to 0.286b * for x=1.10 sample. We have revealed a new anti-phase stripe superstructure in all the La-doped Bi2201 samples, giving rise to a new modulation with a vector q 2. This q 2 modulation is directly evolved from the orthogonal modulation q 1 through an addition of the anti-phase structure so that its vector q 2 equals to q 1b /2. We also discussed the implication of these structural studies on the electronic structure by angle-resolved photoemission spectroscopy (ARPES) experiments in La-Bi2201.

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Section: La-doped Bi2201mentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Compositional evolution of the anti-phase stripe superstructure in Bi₂Sr_2−xLa_xCuO₆(0 <x≤ 1.1) revealed by transmission electron microscopy

Chen¹,

Peng²,

Wang³

et al. 2013

Supercond. Sci. Technol.

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“…According to Zandbergen et al [17], periodic displacements of bis muth and lead atoms can be caused by periodic varia tions in the positions of other atoms of the lattice. In the most commonly accepted model, it is assumed that superstoichiometric oxygen (the oxygen index of the 2223 compound is larger than 10) is contained in the double Bi-O layers.…”

Section: Sample Preparation and Experimental Techniquementioning

confidence: 99%

Oxygen atomic displacement waves in the lattice of the Bi,Pb-2223 phase composite annealed in an atmosphere with a low oxygen (O2 + N2) content

et al. 2012

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After annealing of Bi,Pb 2223/Ag composites in a nitrogen-oxygen atmosphere with a low oxy gen content in the 2223 phase, cross polarized waves of oxygen atomic displacements have been revealed by electron diffraction in the [010] 2223 direction. It has been demonstrated using the methods of X ray photo electron spectroscopy and nuclear microanalysis that nitrogen does not interact with the 2223 lattice and that the oxygen index (9.67 ± 0.20) becomes less than the stoichiometric index (x = 10). It has been found that the generation of atomic displacement waves is due to the deficiency of oxygen in the double Bi-O layers.

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“…One length of the c-axis is expected to correlate with can clearly see that I~is enhanced when the the Sr/Ca ratio and the Bi content. However, samples are annealed at higher temperature, and with increasing oxygen ambient pressure, it is also this enhancement is much more pronounced in possible that more additional oxygen ions are the crystal grown at 200 kPa oxygen ambient incorporated into the BiO layers [21]. This inpressure than in the crystal grown in air.…”

Section: Introductionmentioning

confidence: 99%

Growth of Bi2Sr2CaCu2O8 + x single crystals at different oxygen ambient pressures

Kes

Hiền

et al. 1994

Journal of Crystal Growth

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Bi-2212 superconducting single crystals were grown by the travelling solvent floating zone method at different oxygen ambient pressures. Electron probe micro-analysis showed a systematic increase of the Sr/Ca ratio in the as-grown crystals with increasing oxygen ambient pressure and a maximal superconducting transition temperature of Tc~onset= 95 K, and ziT= 1.5 K was obtained for crystals grown at an oxygen ambient pressure of 200 kPa. Thermogravimetric and post-annealing experiments in air at 500 and 800°Chave shown that the oxygen content and the Tconset values in the crystal do not depend only on the annealing temperature, but also on its chemical composition. The in-field current density J~measured at 5 K on crystals grown at 200 kPa oxygen ambient pressure was considerably smaller than that of crystals grown in air.

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Models for the modulation in A2B2CanCu1+nO6+2n, A, B=Bi, Sr OR Tl, Ba and n=0, 1, 2

Cited by 363 publications

References 25 publications

Compositional evolution of the anti-phase stripe superstructure in Bi₂Sr_2−xLa_xCuO₆(0 <x≤ 1.1) revealed by transmission electron microscopy

Compositional evolution of the anti-phase stripe superstructure in Bi₂Sr_2−xLa_xCuO₆(0 <x≤ 1.1) revealed by transmission electron microscopy

Oxygen atomic displacement waves in the lattice of the Bi,Pb-2223 phase composite annealed in an atmosphere with a low oxygen (O2 + N2) content

Growth of Bi2Sr2CaCu2O8 + x single crystals at different oxygen ambient pressures

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Models for the modulation in A2B2CanCu1+nO6+2n, A, B=Bi, Sr OR Tl, Ba and n=0, 1, 2

Cited by 363 publications

References 25 publications

Compositional evolution of the anti-phase stripe superstructure in Bi2Sr2−xLaxCuO6(0 <x≤ 1.1) revealed by transmission electron microscopy

Compositional evolution of the anti-phase stripe superstructure in Bi2Sr2−xLaxCuO6(0 <x≤ 1.1) revealed by transmission electron microscopy

Oxygen atomic displacement waves in the lattice of the Bi,Pb-2223 phase composite annealed in an atmosphere with a low oxygen (O2 + N2) content

Growth of Bi2Sr2CaCu2O8 + x single crystals at different oxygen ambient pressures

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Compositional evolution of the anti-phase stripe superstructure in Bi₂Sr_2−xLa_xCuO₆(0 <x≤ 1.1) revealed by transmission electron microscopy

Compositional evolution of the anti-phase stripe superstructure in Bi₂Sr_2−xLa_xCuO₆(0 <x≤ 1.1) revealed by transmission electron microscopy