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@ARTICLE{Wagner:857926,
      author       = {Wagner, Julia and Häußler, Wolfgang and Holderer, Olaf
                      and Bauer, Andreas and Shapiro, Stephen and Böni, Peter},
      title        = {{I}nfluence of {C}oncentration {F}luctuations on
                      {R}elaxation {P}rocesses in {S}pin {G}lasses},
      journal      = {Quantum beam science},
      volume       = {2},
      number       = {4},
      issn         = {2412-382X},
      address      = {Barcelona},
      publisher    = {MDPI},
      reportid     = {FZJ-2018-06880},
      pages        = {26 -},
      year         = {2018},
      abstract     = {Using the unique combination of atomically resolved atom
                      probe tomography (APT) and volume averaged neutron
                      (resonance) spin echo (NRSE and NSE) experiments, the
                      influence of nano-scaled clusters on the spin relaxation in
                      spin glasses was studied. For this purpose, the phase
                      transition from the paramagnetic phase to the spin glass
                      phase in an Fe-Cr spin glass with a composition of Fe 17.8
                      Cr 82.2 was studied in detail by means of NRSE. The
                      microstructure was characterised by APT measurements, which
                      show local concentration fluctuations of Fe and Cr on a
                      length scale of 2 to 5 nm, which lead (i) to the coexistence
                      of ferro- and anti-ferromagnetic clusters and (ii) a change
                      of the magnetic properties of the whole sample, even in the
                      spin glass phase, where spins are supposed to be randomly
                      frozen. We show that a generalized spin glass relaxation
                      function, which was successfully used to describe the phase
                      transition in diluted spin glasses, can also be used for
                      fitting the spin dynamics in spin glasses with significant
                      concentration fluctuations.},
      cin          = {JCNS-FRM-II / MLZ / Neutronenstreuung ; JCNS-1},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 / I:(DE-588b)4597118-3 /
                      I:(DE-Juel1)JCNS-1-20110106},
      pnm          = {6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
                      Neutron Research (JCNS) (POF3-623)},
      pid          = {G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
      experiment   = {EXP:(DE-MLZ)J-NSE-20140101 / EXP:(DE-MLZ)RESEDA-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000533300900006},
      doi          = {10.3390/qubs2040026},
      url          = {https://juser.fz-juelich.de/record/857926},
}