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Magneto-Seebeck effect in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>R</mml:mi><mml:mi mathvariant="normal">FeAsO</mml:mi></mml:math>(<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>R</mml:mi><mml:mo>=</mml:mo><mml:mi mathvariant="normal">rare</mml:mi></mml:math>earth) compounds: Probing the magnon drag scenario
We investigate Seebeck effect in REFeAsO (RE=rare earth)compounds as a function of temperature and magnetic field up to 30T. The Seebeck curves are characterized by a broad negative bump around 50K, which is sample dependent and strongly enhanced by the application of a magnetic field. A model for the temperature …