Magnetoresistivity and H (c2)(T) in MgB2 - art. no. 220503

Detailed magnetotransport data on dense wires of MgB2 are reported for appl ied magnetic fields up to 18 T. The temperature and field dependencies of t he electrical resistivity are consistent with MgB2 behaving like a simple m etal and following a generalized form of Kohler's rule. In addition, given the generally higher-T-c values and narrower resistive transition widths as sociated with MgB2 synthesized in this manner, combined with applied magnet ic fields of up to 18 TI an accurate and complete H-c2(T) curve could be de termined. This curve agrees well with curves determined from lower field me asurements on sintered pellets and wires of MgB2. H-c2(T) is linear in T ov er a wide range of temperature (7 K less than or equal toT less than or equ al to 32 K) and has an upward curvature for T close to T-c. These features are similar to other high kappa, clean limit, boron-bearing intermetallics: YNi2B2C and LuNi2B2C.