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@ARTICLE{Sadowski:201614,
      author       = {Sadowski, Janusz and Domagala, Jaroslaw Z and Mathieu,
                      Roland and Kovacs, Andras and Dłużewski, Piotr},
      title        = {{F}ormation of two-dimensionally confined superparamagnetic
                      ({M}n, {G}a){A}s nanocrystals in high-temperature annealed
                      ({G}a, {M}n){A}s/{G}a{A}s superlattices},
      journal      = {Journal of physics / Condensed matter},
      volume       = {25},
      number       = {19},
      issn         = {1361-648X},
      address      = {Bristol},
      publisher    = {IOP Publ.},
      reportid     = {FZJ-2015-03908},
      pages        = {196005 -},
      year         = {2013},
      abstract     = {The annealing-induced formation of (Mn, Ga)As nanocrystals
                      in (Ga, Mn)As/GaAs superlattices was studied by x-ray
                      diffraction, transmission electron microscopy and
                      magnetometry. The superlattice structures with 50 Å thick
                      (Ga, Mn)As layers separated by 25, 50 and 100 Å thick GaAs
                      spacers were grown by molecular beam epitaxy at low
                      temperature (250 ° C), and then annealed at high
                      temperatures of 400, 560 and 630 ° C. The
                      high-temperature annealing causes decomposition to a (Ga,
                      Mn)As ternary alloy and the formation of (Mn, Ga)As
                      nanocrystals inside the GaAs matrix. The nanocrystals are
                      confined in the planes that were formerly occupied by (Ga,
                      Mn)As layers for the up to 560 ° C annealing and diffuse
                      throughout the GaAs spacer layers at 630 ° C annealing.
                      The two-dimensionally confined nanocrystals exhibit a
                      superparamagnetic behavior which becomes high-temperature
                      ferromagnetism (~350 K) upon diffusion.},
      cin          = {PGI-5},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-5-20110106},
      pnm          = {42G - Peter Grünberg-Centre (PG-C) (POF2-42G41)},
      pid          = {G:(DE-HGF)POF2-42G41},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000318070100027},
      pubmed       = {pmid:23603378},
      doi          = {10.1088/0953-8984/25/19/196005},
      url          = {https://juser.fz-juelich.de/record/201614},
}