Magnetic ordering and chain transport ofPrBa2Cu3

Infrared transmission study of crystal-field excitations in Al- and Sr-dopedPr1+xBa2−xBarba1, Jandl2, Nekvasil3 et al. 2004Phys. Rev. B10070View full textAdd to dashboardCite

“…6͑b͒, it is noted that the Pr sublattice in sample 2 magnetically orders at T N (Pr) ϳ12 K. This value corresponds to the Néel temperature measured in polycrystalline low oxygenated materials. 17 As expected, 43 the data reported in Fig. 6͑a͒ show that the Al substitution of Cu͑1͒ in the chains suppresses T N (Pr) in sample 1.…”

Effect of TiO2 on Altering Direction of Interfacial Charge Transfer in a TiO2‐Ag‐MPY‐FePc System by SERS

“…Since the absorption edge in the region of 390–490 nm corresponded to the optical absorption related to the surface state of TiO 2 NPs, the red‐shifted absorption edge of TiO 2 in the interfacial system indicated that the surface defects, including Ti 3+ ions and oxygen vacancies, of the TiO 2 increased, and the increased surface defects were prone to bind electrons and causes CT processes . The presence of surface defects was confirmed by the appearance of two small shoulder peaks at 457.9 and 463.6 eV of Ti 3+ in the XPS spectra of TiO 2 in the interfacial system (Supporting Information, Figure S3) . Furthermore, a visible band in the region of 630–680 nm, assigned to the Q band of FePc, was observed, which was much stronger than the one in the system without TiO 2 .…”

Characterization of localized hole states inPr1+xBa2−xPieper1, Wiekhorst2, Wolf3 2000Phys. Rev. B210100View full textAdd to dashboardCite

“…65 The defect is expected to reduce the hole count in the planes and provides a strong scattering center in the chain layer, where it may contribute to suppress 1D-conductivity in the chains. [66][67][68] However, the experiments indicate that the influence of the defects is limited to the chains, an independent mechanism not active in Nd123 must be present in Pr123 to suppress the MIT and superconductivity in the CuO 2 -planes. 69 We emphasize, however, that [P r] Ba may well influence the low temperature magnetic structure of the Cu(2)-sublattice by inducing magnetic moments on Cu(1)-sites.…”