Comparison of Different Critical Current Density Models for Undoped Monofilamentary Ti-Sheathed MgB2 Tapes

Two Jc dependency on B models with physical backgrounds and two semiempirical models are fitted in fields B>1.5 T to critical current measurements. The measurements were previously performed on various undoped titanium sheathed monocore MgB2 tapes. The models are fitted to magnetic measurements performed at temperatures ranging from 4.2 to 15 K and to transport measurements in both parallel and perpendicular directions.