Structural modulation in bismuth cuprate superconductor observed by X-ray reciprocal space mapping

Kaneko, Satoru; Akiyama, Kensuke; Shimizu, Yoshitada; Hirabayashi, Yasuo; Ohya, Seishiro; Funakubo, Hiroshi; Yoshimoto, Mamoru

doi:10.1016/j.jcrysgro.2005.11.063

Cited by 20 publications

(5 citation statements)

References 15 publications

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“…Moreover, we propose that the local noncentrosymmetric structure in the Cu site could be driven by sawtooth modulations of the oxygens in the Bi 2 O 2 slabs [62][63][64][65][66][67] which will result in a noncentrosymmetric superconducting phase in the 2D CuO 2 layers Finally, taking into account that Bi2212 is characterized by a local non-centrosymmetric structure like in few other oxides [75][76][77], we suggest to confirm these results by spin resolved ARPES experiments and by further experiments looking for the unique features of superconductivity in non-centrosymmetric systems [78][79][80][81][82][83][84][85][86][87] on Bi2212 samples.…”

Section: Discussionmentioning

confidence: 99%

“…The misfit strain modulation and the charge density wave modulation induce local lattice fluctuations revealed by anisotropic response of photoemission [58,59] and by anisotropic xray absorption probing the local structure [60,61]. The CuO 2 lattice fluctuations could be driven by sawtooth modulations of the oxygens in the Bi2O2 slabs [62][63][64][65][66][67] which could produce a noncentrosymmetric superconducting phase in the CuO 2 planes. To study such lattice distortions one can use XMCD technique which is the ideal tool to detect the local noncentrosymmetric structure in layered materials [68][69][70].…”

Section: Introductionmentioning

confidence: 99%

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Local Noncentrosymmetric Structure of Bi2Sr2CaCu2O8+y by X-ray Magnetic Circular Dichroism at Cu K-Edge XANES

Иванов

Ivanov

Менушенков

et al. 2017

J Supercond Nov Magn

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The two-dimensional Bi 2 Sr 2 CaCu 2 O 8+y (Bi2212), the most studied prototype cuprate superconductor, is a lamellar system made of a stack of two-dimensional corrugated CuO 2 bilayers separated by Bi 2 O 2+y Sr 2 O 2 layers. While the large majority of theories, proposed to interpret unconventional high T c superconductivity in Bi 2 Sr 2 CaCu 2 O 8+y, assume a centrosymmetric tetragonal CuO 2 lattice for the [CuO 2 ]Ca[CuO 2 ] bilayer here we report new compelling results providing evidence for local non-centrosymmetric symmetry at the Cu atom. We have measured polarized Cu K-edge XANES (x-ray absorption near edge structure) and the K-edge X-ray magnetic circular dichroism (XMCD) of a Bi2212 single crystal near optimum doping. The Cu K edge XMCD signal was measured at ID12 beamline of ESRF with the k-vector of x-ray beam parallel to c-axis i.e. with the electric field of x-ray beam E//ab, using a 17 T magnetic field parallel to the c-axis of a Bi2212 single crystal. Numerical simulations of the XMCD signal of Bi2212 by multiple scattering theory have shown agreement with the experimental XMCD signal only for the local structure with non-centrosymmetric Bb2b space group of Bi 2 Sr 2 CaCu 2 O 8+y . Ivanov, A. A., et a. Local noncentrosymmetric structure of Bi2Sr2CaCu2O8+y …

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Local Noncentrosymmetric Structure of Bi2Sr2CaCu2O8+y by X-ray Magnetic Circular Dichroism at Cu K-Edge XANES

Иванов

Ivanov

Менушенков

et al. 2017

J Supercond Nov Magn

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“…In the studies, it was seen that MgO, SrTiO 3 , LaAlO 3 , Al 2 O 3 and yttria stabilised zirconia substrates appear to be suitable substrate materials on which BiSrCaCuO superconducting thin films are successfully grown. 26,27 In the present study, the properties of the (BiPb) 2 Sr 2 Ca 2 Cu 3 O 10zy thin films deposited on the MgO (100) substrate by rf sputtering were investigated as a function of the Bi content. The effect of the Bi deficiency on the structural, electrical, magnetic and critical current density is reported.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Bi deficiency on grain alignment of BiPb-2223 thin film fabricated using rf sputtering process and on critical current density properties

Aksan

Altın

Yakıncı

et al. 2011

Materials Science and Technology

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In the present study, thin films prepared as a function of the Bi concentration in the BiPbSrCaCuO system were synthesised. Thin films were fabricated using radio frequency sputtering method. Crystal structure of the films fabricated was determined from X-ray diffraction measurements. The crystal orientation was analysed by X-ray pole figure and in-plane alignment. Both X-ray diffraction and pole figure analysis revealed that crystallinity in the films decreased significantly with decreasing Bi concentration in the system. A systematic decrease in the superconducting transition temperature and hole concentration per CuO plane was obtained with decreasing Bi concentration. The Jc values of the films were calculated using Bean formula. It exhibits a significant dependence on the magnetic field and temperature. It was found that Jc decreased sharply with increasing applied magnetic field. The highest Jc value was found to be 1·06×106 A cm−2 at 10 K, which corresponded to the best flux pinning among the films fabricated.

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“…X-ray reciprocal space mapping (XRSM) revealed asymmetric SC peaks around Bi-2212 main peaks of Bi-2212(0020) 11) and (0012). 12) X-ray reflectivity (XRR) was measured on Bi-2212 films with a thickness in the range from a few hundreds to a thousand A ˚, and the deposition rate of Bi-2212 was estimated to be approximately 0.01 A ˚/pulse. The thickness of the thin film was estimated to be $1300 A ˚.…”

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confidence: 99%

Effect of Strain on Supercell Structure of Bismuth Cuprate Superconducting Film

Kaneko

Akiyama

Mitsuhashi

et al. 2008

jjap

Self Cite

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T h e design and use of a small time of flight (TOF) mass spectrometer for producing mass spectra of ions which have been laser ablated from a solid metal target are described. TOF spectra with a resolution mlAm of 100 were produced. Known samples of inconel were used to characterize the operation of t h e spectrometer. Isotope separation was demonstrated and mass spectra, in which the ratios.01 constituents were representative of the composition of the sample, were produced. The beneficial effect of a stainless steel grid placed between the target and flight tube at a positive potential was investigated. Results are shown and correlated with theoretical flight times for different conditions. A model is proposed for the various processes occurring.

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Structural modulation in bismuth cuprate superconductor observed by X-ray reciprocal space mapping

Cited by 20 publications

References 15 publications

Local Noncentrosymmetric Structure of Bi2Sr2CaCu2O8+y by X-ray Magnetic Circular Dichroism at Cu K-Edge XANES

Local Noncentrosymmetric Structure of Bi2Sr2CaCu2O8+y by X-ray Magnetic Circular Dichroism at Cu K-Edge XANES

Effect of Bi deficiency on grain alignment of BiPb-2223 thin film fabricated using rf sputtering process and on critical current density properties

Effect of Strain on Supercell Structure of Bismuth Cuprate Superconducting Film

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