Structural, magnetic, and EPR studies of BaCuO2+x

High‐Tc Superconductor LuBa2Cu3O6 + x

“…At higher temperature the g-factor has the following values: at 10 K g = 2.178 (3) with AH = 0.036(1) T and at 17 K g = 2.127 (3) with AH = 0.036(1) T. The value of the g-factor increases with decreasing temperatures. This can be explained as previously by considering the influence of an additional internal magnetic field when approaching a magnetically ordered state [8]. The other part of the EPR spectrum comprises a number of lines which disappeared above 25 K. Above this temperature another very broad EPR line appears with linewidth over 0.8 T and intensity increasing with increasing temperature up to about 60 K. At present we find it difficult to interpret this "strange" EPR spectra at these low temperatures.…”

Ferromagnetic Coupling in a New Copper(II) Schiff Base Complex with Cubane Core: Structure, Magnetic Properties, DFT Study and Catalytic Activity

“…The spectra recorded at room temperature (r.t.) and liquid nitrogen (LN) temperature on polycrystalline complex 1 (Figure 7) are characterized by an almost isotropic and broad resonance centered at g = 2.150 (r.t.) and 2.100 (LN). These broad signals are indicative for a bulk concentration of copper ions having ferromagnetic interaction and a rapid intramolecular spin‐spin relaxation 34,35. The spectrum at LN temperature is better resolved and shows the features due to the hyperfine coupling between the electron and the Cu nuclei (Figure 7, a).…”

Secondary-phase orientation probed by EPR:mY2BaCuO5sinPellerin1, Simon2, Odier3 et al. 1997Phys. Rev. B0000View full textAdd to dashboardCite

“…1 The EPR signal of the BaCuO 2ϩx phase, also present in small quantity, strongly depends on oxygen stoichiometry. 4 For small x values it consists of a very broad line, while when oxidized the line shape is closer to that of Y 2 BaCuO 5 ͑211͒. However, due to its more marked rhombic character, it is definitely different from that of 211.…”