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Magnetic and electrical properties and carrier doping effects on the iron-based host compound Sr<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow /><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>ScFeAsO<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow /><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>
Additional charge carriers were introduced to the iron oxyarsenide Sr${}_{2}$ScFeAsO${}_{3}$ under a high-pressure condition, followed by measurements of electrical resistivity, the Hall coefficient, and magnetic susceptibility. The host compound Sr${}_{2}$ScFeAsO${}_{3}$ shows metallic conductivity down to \ensuremath{\sim}200 K and turns to show a semiconducting-like conductivity accompanied by a positive magnetoresistance ($22%$ …