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要旨:
The semiconducting half-Heulser compound DyNiBi shows a negative giant
magneto resistance (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.
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