The longitudinal resistivity (ρ_(xx)) and Hall coefficient (R_(H)) were measured for MgB_(2) sintered under high pressure. We found that R_(H) is positive like cuprate high-T_(c) superconductors, and decreases as the temperature increases for 40 K 展开▼
National Creative Research Initiative Center for Superconductivity and Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea;
