Giant magnetoresistance and extraordinary magnetoresistance in inhomogeneous semiconducting DyNiBi
arXiv:0709.4182 · doi:10.1016/j.ssc.2008.08.027
Abstract
The semiconducting half-Heulser compound DyNiBi shows a negative giant magnetoresistance (GMR) below 200 K. Except for a weak deviation, this magnetoresistance scales roughly with the square of the magnetization in the paramagnetic state, and is related to the metal-insulator transition. At low temperature, a positive magnetoresistance is found, which can be suppressed by high fields. The magnitude of the positive magnetoresistance changes slightly with the amount of impurity phase.
3 pages, 3 figures