Low-voltage control of ferromagnetism in a semiconductor p-n junction

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Abstract

Controlling the magnetization by low-voltage charge depletion in field-effect transistors has been a formidable challenge due to the typically large carrier concentrations in ferromagnets compared to semiconductors. Here we demonstrate that this concept is viable in an all-semiconductor, p-n junction transistor utilizing a thin-film ferromagnetic (Ga,Mn)As channel. We report gate-dependent Curie temperature and magnetoresistance, and persistent magnetization switchings induced by short electrical pulses of a few volts. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.

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Owen, M. H. S., Wunderlich, J., Novák, V., Olejník, K., Zemen, J., Výborný, K., … Jungwirth, T. (2009). Low-voltage control of ferromagnetism in a semiconductor p-n junction. New Journal of Physics, 11. https://doi.org/10.1088/1367-2630/11/2/023008

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