Superconducting properties content

Variation in the Structural, Magnetic, and Superconducting Properties of YBa2Cu307 x with Oxygen Content... 

Figure 4. Effect of oxygen content on the superconducting properties of YBa2Cu307 y.

The high-Tc compound YBa2Cu3(>7 j crystallizes in the orthorhombic space group Pmmm (No. 47) with Ti 91K for 0 < 3 < 0.2 (Table 4.2-17). The superconducting properties depend on the oxygen content 7 — 5. Oxygen loss on the e site [0(1) in YBa2Cu307] leads to a destruction of the Cu—O chains. For 3=1 only linear coordinated Cu(l) atoms are present. 

Superconducting Properties The intrinsic superconducting properties which are independent of the microstructure are the lower and the upper critical field, Hd and respectively and the superconducting transition temperature Tc- These superconducting properties depend on the composition, especially the oxygen content (Table 4.2-23). Further... 

The strongly anisotropic shape of the crystallites favors the development of a texture parallel to the surface of the Ag tube in powder-in-tube (PIT) processing, and this is highly desirable for the superconducting properties. The Ag content also serves as a source of pinning centers that hinder the flux line motion. 

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