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@ARTICLE{Maryko:189601,
author = {Maryško, M. and Hejtmánek, J. and Laguta, V. and Sofer,
Z. and Sedmidubský, D. and Šimek, P. and Veselý, M. and
Mikulics, M. and Buchal, C. and Macková, A. and Malínský,
P. and Wilhelm, R. A.},
title = {{F}erromagnetic and paramagnetic magnetization of implanted
{G}a{N}:{H}o,{T}b,{S}m,{T}m films},
journal = {Journal of applied physics},
volume = {117},
number = {17},
issn = {1089-7550},
address = {Melville, NY},
publisher = {American Inst. of Physics},
reportid = {FZJ-2015-02738},
pages = {17B907},
year = {2015},
abstract = {The SQUID magnetic measurements were performed on the GaN
films prepared by metal-organic vapour phase epitaxy and
implanted by Tb3+, Tm3+, Sm3+, and Ho3+ ions. The sapphire
substrate was checked by the electron paramagnetic resonance
method which showed a content of Cr3+ and Fe3+ impurities.
The samples 5 × 5 mm2 were positioned in the
classical straws and within an estimated accuracy of
10−6 emu, no ferromagnetic moment was detected in the
temperature region of 2–300 K. The paramagnetic
magnetization was studied for parallel and perpendicular
orientation. In the case of GaN:Tb sample, at T = 2 K,
a pronounced anisotropy with the easy axis perpendicular to
the film was observed which can be explained by the lowest
quasi-doublet state of the non-Kramers Tb3+ ion. The Weiss
temperature deduced from the susceptibility data using the
Curie-Weiss (C-W) law was found to depend substantially on
the magnetic field.},
cin = {PGI-9 / JARA-FIT},
ddc = {530},
cid = {I:(DE-Juel1)PGI-9-20110106 / $I:(DE-82)080009_20140620$},
pnm = {522 - Controlling Spin-Based Phenomena (POF3-522)},
pid = {G:(DE-HGF)POF3-522},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000354984100230},
doi = {10.1063/1.4916761},
url = {https://juser.fz-juelich.de/record/189601},
}