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@INPROCEEDINGS{Ptter:902529,
      author       = {Pütter, Sabine and Mattauch, Stefan and Koutsioumpas,
                      Alexandros and Schöffmann, Patrick and Syed Mohd, Amir and
                      Zhernenkov, Kirill and Babcock, Earl and Salhi, Zahir and
                      Ioffe, Alexander and Brückel, Thomas},
      title        = {{R}evealing magnetic properties of thin films utilizing
                      polarized neutrons},
      reportid     = {FZJ-2021-04337},
      year         = {2021},
      abstract     = {Polarized neutron reflectometry (PNR) is a versatile probe
                      for the study of the magnetic moment with depth resolution.
                      As self-calibrating technique, it provides independently
                      values of the magnetic moment, its direction in the film
                      plane, and film thickness together with its scattering
                      length density values. It is layer selective and buried
                      layers in multilayer systems can be analyzed [1].In this
                      contribution we will provide an overview of the
                      possibilities of PNR as well as present the reflectometer
                      MARIA [2]. It is a state of the art reflectometer at the
                      constant neutron flux reactor in Garching, Germany. MARIA
                      exhibits a high dynamic range of up to 7-8 orders of
                      magnitude and a maximum Q (momentum transfer vector) higher
                      than 0.25 Å$^{-1}$. With the combination of a 400 x 400
                      mm$^2$ position sensitive detector and a time-stable 3He
                      polarization spin filter based on Spin-Exchange Optical
                      Pumping (SEOP), the instrument is well equipped for
                      investigating specular reflectivity and off-specular
                      scattering from magnetic thin films and artificially
                      fabricated structures like nano-dots, gratings, etc. down to
                      the monolayer regime in full spin polarization. Furthermore,
                      the GISANS option can be used to investigate lateral
                      correlations in the nm range. Due to the large detector and
                      pinhole collimation of the incident neutron beam even
                      grazing incidence diffraction measurements are possible. All
                      the options, like GISANS, neutron polarization and 3He
                      polarization spin filter can be moved in and out of the
                      neutron beam within seconds by remote controlled push button
                      operation and do not require any realignment.Magnetic fields
                      can be applied up to 5 T and a low temperature sample
                      environment (down to 3 K) is offered. Thin film samples may
                      be fabricated in a MBE system nearby (deposition materials
                      according to the requirements of the user). For
                      investigation of samples which are sensitive to ambient
                      conditions a UHV transport and measurement chamber with base
                      pressure in 10−10 mbar range is provided (transfer forth
                      and back) [3]. Typical substrate size for investigation is
                      10x10 mm$^2$.Examples for PNR investigation of thin films
                      like e.g. NiO/Fe/L10-FePt, SrCoO$_x$, Co/W(110),
                      Fe$_4$N/LaAlO$_3$(001) are discussed. However, the MARIA
                      reflectometer and the MBE system are user instruments. Hence
                      we offer measurement and sample preparation time to
                      interested users [4]. Let’s discuss your ideas![1] J. A.
                      C. Bland and C. A. F. Vaz, Chapter 7 in J. A. C. Bland and
                      B. Heinrich, Eds., Ultrathin Magnetic Structures III,
                      Springer-Verlag Berlin (2005)[2] Heinz Maier-Leibnitz
                      Zentrum. (2015). J. large-scale research facilities, 1, A8.
                      http://dx.doi.org/10.17815/jlsrf-1-29; S. Mattauch, A.
                      Koutsioumpas, et al., J. appl. Crystallography, 51, 646
                      (2018)[3] A.Syed Mohd, S.Pütter, et al., Rev. Sci. Instrum.
                      87, 123909(2016)[4]
                      www.mlz-garching.de/maria;www.mlz-garching.de/mbe},
      month         = {Jun},
      date          = {2021-06-13},
      organization  = {Advances in Magnetics 2020-21, Moena
                       (Italy), 13 Jun 2021 - 16 Jun 2021},
      subtyp        = {After Call},
      cin          = {JCNS-4 / JCNS-1 / JCNS-FRM-II / JCNS-2},
      cid          = {I:(DE-Juel1)JCNS-4-20201012 / I:(DE-Juel1)JCNS-1-20110106 /
                      I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-2-20110106},
      pnm          = {6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ)
                      (POF4-6G4) / 632 - Materials – Quantum, Complex and
                      Functional Materials (POF4-632) / $NFFA-Europe_supported$ -
                      Technically supported by Nanoscience Foundries and Fine
                      Analysis Europe $(2020_Join2-NFFA-Europe_funded)$},
      pid          = {G:(DE-HGF)POF4-6G4 / G:(DE-HGF)POF4-632 /
                      $G:(DE-HGF)2020_Join2-NFFA-Europe_funded$},
      experiment   = {EXP:(DE-MLZ)MARIA-20140101 / EXP:(DE-MLZ)MBE-MLZ-20151210},
      typ          = {PUB:(DE-HGF)24},
      url          = {https://juser.fz-juelich.de/record/902529},
}