Magnetic and structural properties of Gd-implanted zinc-blende GaN

F. Y. Lo*, A. Melnikov, D. Reuter, A. D. Wieck, V. Ney, T. Kammermeier, A. Ney, J. Schörmann, S. Potthast, D. J. As, K. Lischka

*Corresponding author for this work

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37 Citations (Scopus)


Zinc-blende GaN layers grown by molecular beam epitaxy were uniformly focused-ion-beam implanted with 300 keV Gd3+ ions for doses ranging from 1× 1012 to 1× 1015 cm-2, and their structural and magnetic properties were studied. The implanted samples were not subjected to any annealing treatment. Only Gd incorporation into zinc-blende GaN was observed by x-ray diffraction. Magnetic investigations using superconducting quantum interference device magnetometry reveal a (super)paramagneticlike behavior with an ordering temperature around 60 K for the sample with the highest implantation dose. Our experimental studies indicate that the spontaneous electric polarization in wurtzite GaN is the crucial mechanism for its ferromagneticlike behavior upon Gd doping.

Original languageEnglish
Article number262505
JournalApplied Physics Letters
Issue number26
Publication statusPublished - 2007
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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