RT Journal Article
T1 Magnetic phases and anisotropy in Gd-doped GaN
A1 Pérez García, Lucas
A1 Lau, G. S.
A1 Dhar, S.
A1 Brandt, O.
A1 Ploog, K. H.
AB In this work we present a detailed study of the magnetic properties of GaN:Gd layers with different Gd content (6x10^(15) to 1x10^(19) cm^^ (-3)) grown by reactive molecular beam epitaxy. The temperature dependence of the magnetic properties suggests the existence of at least two ferromagnetic phases with different order temperatures. The coexistence of two ferromagnetic phases is explained within the framework of the phenomenological model, introduced previously by Dhar [Phys. Rev. Lett. 94, 037205 (2005)]. The layers are also found to exhibit a magnetic anisotropy, with the hard axis along the growth direction and an easy plane parallel to the surface. Moreover, the saturation magnetization shows a dependence on the orientation of the magnetic field, which may result from the anisotropy in the polarization induced in the GaN matrix by the internal and external magnetic fields.
PB American Physical Society
SN 1098-0121
YR 2006
FD 2006-11
LK https://hdl.handle.net/20.500.14352/52137
UL https://hdl.handle.net/20.500.14352/52137
LA eng
NO © 2006American Physical Society We thank R. Koch for careful reading of the manuscript. L.P. gratefully acknowledges the support of the Alexander von Humboldt foundation.
NO Alexander von Humboldt Foundation.
DS Docta Complutense
RD 6 abr 2025