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@INPROCEEDINGS{Hutanu:859547,
      author       = {Hutanu, Vladimir},
      title        = {{N}ew single crystal diffractometer with polarized neutrons
                      {POLI} at {MLZ} as a versatile tool for the detailed
                      investigation of magnetic structures},
      reportid     = {FZJ-2019-00399},
      year         = {2018},
      abstract     = {Polarized neutron diffraction (PND) is a powerful method to
                      investigate magnetic structures. It gives unique access to
                      contributions from nuclear and magnetic scattering, their
                      interference terms, and magnetic chirality and permits to
                      distinguish between them. In contrast to the non-polarized
                      neutron diffraction, where the scattered intensity depends
                      as square on the magnetic structure factor, PND has a linear
                      nuclear-magnetic interference term as part of the scattered
                      intensity. This increases the precision in the determination
                      of the ordered magnetic moment for at least one order of
                      magnitude. Born in the late 50s of the last century and
                      developed over decades by a small groups of devoted experts,
                      PND became nowadays a wide spread, well established, and
                      recognized technique to answer difficult scientific
                      questions about the detailed magnetic ordering in topic
                      materials, often intractable with other methods. Recently
                      newest member of such instrumentation family POLI
                      (Polarization Investigator) was built and commissioned at
                      the neutron source “Heinz Maier-Leibnitz” (MLZ) in
                      Garching Germany. POLI is the first instrument routinely
                      using 3He spin filters both to produce and to analyze the
                      neutron polarization in combination with double focusing
                      non-polarized monochromators. This results in a relatively
                      high flux of the polarized neutrons of the short wavelength
                      and improved resolution in comparison with other similar
                      instruments. Three different experimental techniques are
                      implemented (or under development) on POLI: a) Spherical
                      neutron polarimetry (SNP), called also 3D polarization
                      analysis, using the third generation polarimeter device
                      Cryopad, b) classical flipping ratio (FR) technique in
                      applied magnetic field and c) non-polarized neutron
                      diffraction under extreme conditions (high/low temperatures,
                      magnetic/electric fields, pressure and their combination).
                      We will present recent examples of using these techniques on
                      POLI for the detailed determination of the magnetic
                      structures in multiferroics, superconductors, heavy fermion
                      compound and other interesting magnetic materials.},
      month         = {Sep},
      date          = {2018-09-27},
      organization  = {CNAM Condensed Matter Colloquium,
                       Maryland (United States), 27 Sep 2018 -
                       27 Sep 2018},
      subtyp        = {Invited},
      cin          = {JCNS-FRM-II / JCNS-2 / JARA-FIT},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-2-20110106 / $I:(DE-82)080009_20140620$},
      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)POLI-HEIDI-20140101},
      typ          = {PUB:(DE-HGF)31},
      url          = {https://juser.fz-juelich.de/record/859547},
}