Light and electric field control of ferromagnetism in magnetic quantum structures

Abstract

A strong influence of illumination and electric bias on the Curie temperature and saturation value of the magnetization is demonstrated for semiconductor structures containing a modulation-doped p-type Cd0.96Mn0.04Te quantum well placed in various built-in electric fields. It is shown that both light beam and bias voltage generate an isothermal and reversible cross-over between the paramagnetic and ferromagnetic phases, in the way that is predetermined by the structure design. The observed behavior is in quantitative agreement with the expectations for systems, in which ferromagnetic interactions are mediated by the weakly disordered two-dimensional hole liquid.

4 pages and 3 figures

References in corpus (1)

• Hole-hole correlation effects on magnetic properties of Mn${}_x$III${}_{1-x}$V diluted magnetic semiconductors

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