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@INPROCEEDINGS{SyedMohd:825744,
      author       = {Syed Mohd, Amir and Pütter, Sabine and Mattauch, Stefan
                      and Weber, Alexander and Koutsioumpas, Alexandros and
                      Schneider, Harald and Brückel, Thomas},
      title        = {{QUASI} {IN}-{SITU} {NEUTRON} {REFLECTIVITY} {ON} {THIN}
                      {FILMS} {IN} {ULTRA} {HIGH} {VACUUM}},
      reportid     = {FZJ-2017-00056},
      year         = {2016},
      abstract     = {MARIA, belonging to JCNS at MLZ in Garching, is a dedicated
                      versatile instrument for polarised neutron reflectometry
                      (PNR) and grazing incidence small angle neutron scattering
                      (GISANS) studies of ultra-thin films. However, due to
                      limited space a UHV system for thin film growth and in-situ
                      measurements cannot be placed on-site. Hence, up to now
                      ultra thin films which are sensitive to ambient air have
                      been fabricated in the MBE system located in the thin film
                      laboratory nearby and were covered by protecting cap layers
                      in-situ. However these layers may change the physical
                      properties of the sample, which is undesirable and prevents
                      from further manipulation of the sample, e.g. growth of
                      additional layers.Recently, we have solved this problem by
                      developing a handy mini UHV-chamber which is capable for
                      both, sample transfer and quasi in-situ measurements at the
                      neutron reflectivity instrument, respectively. Quasi in-situ
                      polarized neutron reflectivity (PNR) measurements can be
                      performed at room temperature in magnetic fields of up to
                      600 mT at MARIA.Our solution consists of a DN CF-40 cube
                      with two opposing sapphire windows for the neutron beam, a
                      combined non evaporable getter and ion pump for keeping the
                      vacuum, a wobble stick, which is needed for in-situ sample
                      transfer and also serves as sample holder for samples of up
                      to 1 cm2 and a valve for sample exchange by mounting the
                      chamber on the MBE system. The pressure in the transfer
                      chamber is kept in the 10−10 mbar range during transport
                      and PNR measurement.We present first polarized neutron
                      reflectivity measurements on Co ultra-thin films at room
                      temperature at different magnetic fields in the Q-range up
                      to 0.2 Å−1. Booking of the access to the MBE system as
                      well as the transport chamber is possible via the MLZ user
                      office system in combination with an application for a beam
                      time at neutron instruments like MARIA.This project is part
                      of the nanoscience foundry and fine analysis project (NFFA,
                      www.nffa.eu) and has received funding from the EU’s H2020
                      research and innovation programme under grant agreement N.
                      654360.},
      month         = {Nov},
      date          = {2016-11-21},
      organization  = {Conference on Neutron Scattering,
                       Mumbai (India), 21 Nov 2016 - 23 Nov
                       2016},
      subtyp        = {Invited},
      cin          = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
                      (München) ; JCNS-FRM-II / JCNS-2 / PGI-4 / JARA-FIT},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
                      $I:(DE-82)080009_20140620$},
      pnm          = {524 - Controlling Collective States (POF3-524) / 6212 -
                      Quantum Condensed Matter: Magnetism, Superconductivity
                      (POF3-621) / 6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich
                      Centre for Neutron Research (JCNS) (POF3-623)},
      pid          = {G:(DE-HGF)POF3-524 / G:(DE-HGF)POF3-6212 /
                      G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
      experiment   = {EXP:(DE-MLZ)MARIA-20140101},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/825744},
}