  Fe-clad MgB2 long tapes have been fabricated using a powder-in-tube
technique. An Mg + 2B mixture was used as the central conductor core and
reacted in-situ to form MgB2. The tapes were sintered in pure Ar at 800 ^(o) C
for 1 h at ambient pressure. SEM shows a highly dense core with a large grain
size of 100 micron. The Fe clad tape shows a sharp transition with transition
width of 0.2 K and Tc0 at 37.5 K. We have achieved the highest transport
critical current reported so far at 1.6 times 10^(4) A/cm^2 for both 29.5 K in
1 Tesla and 33 K in null field. R-T and critical current were also measured for
fields perpendicular and parallel to the tape plane. The iron cladding shielded
on the core from the applied external field, with the shielding being less
effective for the field in the tape plane. Fe cladding may be advantageous for
some applications as it could reduce the effects of both the self-field and
external fields.
