Room-temperature ferromagnetism in dielectric GaN(Gd)

Details Room-temperature ferromagnetism in dielectric GaN(Gd) Room-temperature ferromagnetism in dielectric GaN(Gd)

2009-05-04

arxiv.org/abs/0905.0500v1

Physics

Condensed Matter

Materials Science

9 pages, 3 figures submitted to Applied Physics Letters

Scientific paper

We present an explanation of recently observed giant magnetic moment and room-temperature ferromagnetism in the dielectric GaN doped with Gd. Our approach uses the polarization mechanism of exchange interaction, which occurs if the d-level of Gd appears in the bandgap close to the valence band edge. Calculated ferromagnetic critical temperature and the value of the magnetic moment well correspond to experimental findings.

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