Complex susceptibility of single crystal YBa2Cu3O7-x. (I).

CRITICAL BEHAVIOR OF THE FIELD-DEPENDENT SPECIFIC HEAT OF A YBa2Cu3O7-x SINGLE CRYSTAL

The heat capacity anomaly of YBa2Cu307-, at Tc is reduced in amplitude and broadened upon application of a magnetic field along the c-axis. However, the shift, as measured by the point of maximum increase with decreasing temperature, is much smaller than expected from estimates of the upper critical field. The possibility of critical behavior is discussed. Following the exciting discovery of su...

Angular Dependence of Ultrasonic Attenuation at Hcl in YBa2Cu3O7 Single Crystal

The resistive behavior of type-I1 superconductors in the superconducting state is largely influenced by the materials' ability to pin magnetic flux lines. While an externally applied magnetic field leads to an ordered flux-lattice in defect-free superconductors, spatial variatim in the superconducting order parameter tend to deform the vortex system. This has immediate implications for the temp...

EFFECTS OF EPITAXIAL STRAIN ON THE GROWTH MECHANISM OF YBa2Cu3O7−x THIN FILMS IN [YBa2Cu3O7−x/PrBa2Cu3O7−x] SUPERLATTICES

We report on the growth mechanism of YBa2Cu3O7−x. Our study is based on the analysis of ultrathin, YBa2Cu3O7−x layers in c-axis oriented YBa2Cu3O7−x / PrBa2Cu3O7 superlattices. We have found that the release of epitaxial strain in very thin YBCO layers triggers a change in the dimensionality of the growth mode. Ultrathin, epitaxially strained, YBCO layers with thickness below 3 unit cells grow ...

بررسی خواص مغناطیسی ابررسانای سرامیکی Yba2Cu3O7-x/Ag

Magneto-Optical properties of GaP single crystal

The temperature dependence of magneto-optical and magneto-photoconductivity measurements were carried out in the range of (200-330) K. A home made optical cryostat was used for the measurements. The measured room temperature value of the energy gap was found to be 2.211 eV. The temperature coefficient of energy gap was found to be -5.48×10-4 eV/K obtained by the optical absorption method and -4...