X-ray studies of the YBa2Cu3O6+x superstructures in the range of 0.40(3) ≤ x ≤ 0.73(3)

Simple solution to problems concerning oxygen ordering inYBa2Cu3OMønster1, Lindgård2, Andersen3 1999Phys. Rev. B9170View full textAdd to dashboardCite

“…Numerous experiments have aimed at determining the oxygen configurations: electron microscopy, 1 x-ray, and neutron scattering. [2][3][4][5][6][7][8] However, this has only yielded indirect information. Computer modeling is needed in order to give the corresponding real-space picture.…”

High-resolution electron microscopy and electron diffraction of perovskite-type superconducting copper oxides

“…The fundamental unit cell is orthorhombic, with a dimension of 2a × b × c. Other oxygen-ordering models of basal planes (Cu-O) of the YBa 2 Cu 3 O 7-x are also proposed as shown in Figure 22B, which depends on the oxygen content. These phases would correspond to the ortho-II phase and ortho-III phases [90][91][92][93][94][95][96], which results in the changes of Tc, and the control of oxygen atoms in the oxide crystals is important [97][98][99]. Table 9 Summary of modulated structures of YBa 2 Cu 3 O y .…”

Structural inhomogeneity and twinning inYBa2Cu3O7−δsuperconductors: High-resolution transmission electron microscopy me

“…[2][3][4][5][6][7] The simplest of these intermediates is the Ortho II phase with ␦ = 0.5. The atomic structures and stability of many of these phases have been examined, experimentally, by neutron and x-ray diffraction [8][9][10][11][12][13][14][15][16][17][18] and, theoretically, by density functional theory 7,19 and cluster-expansion calculations. [20][21][22][23] The dominant microstructural feature in YBCO is twinning.…”