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@INPROCEEDINGS{Deng:859543,
      author       = {Deng, Hao and Hutanu, Vladimir and Sazonov, Andrew and
                      Thoma, Henrik and Luberstetter, Wolfgang and Roth, Georg},
      title        = {{N}ew dedicated neutron scattering instrument for complex
                      magnetic structures {POLI}},
      reportid     = {FZJ-2019-00395},
      year         = {2018},
      abstract     = {As one of the most powerful methods for investigating
                      nuclear and magnetic structures, neutron diffraction
                      (especially polarized neutron diffraction) plays a key role
                      in better understanding complex magnetic and domain
                      configuration in multiferroics, heavy fermion
                      superconductors, frustrated systems and other complex
                      magnetic materials. Polarized single-crystal diffractometer
                      POLI at MLZ[1] employs non-polarized double-focusing
                      monochromators in combination with high-efficiency 3He cell
                      polarizers, which lead to a gain in both flux and resolution
                      in comparison with other short-wavelength polarized neutron
                      diffractometers using Heusler-alloy monochromators. With
                      flexible instrument setups, namely: (1) classical single
                      crystal neutron diffraction in extreme environments like
                      high magnetic fields, very low/high temperatures, high
                      voltage, pressure cells etc. and their combinations; (2)
                      polarize neutron diffraction (flipping-ratio measurements)
                      using high magnetic field[2] and (3) zero-field spherical
                      neutron polarimetry (SNP) using the third generation
                      Cryopad[3], and rather high flux of hot polarized neutron,
                      POLI raises to a powerful tool in complex magnetic structure
                      research.In this report, we will show the strength of
                      instrument in study magnetic structures. Several examples of
                      applications in resolving different challenging aspects in
                      crystal, magnetic and domain structure of complex magnetic
                      material will be presented. Examples of (1) basic magnetic
                      structure refinement, (2) magnetic structure studies under
                      very low temperature and high pressure, (3) distinguish
                      magnetic spin density wave, helicoidal or cycloidal chiral
                      structures, (4) separate incommensurate structures with very
                      long period, (5) magnetic domain study with depolarization
                      analysis using SNP setup. Our versatile instrument gives a
                      unique access to understanding complicated magnetic
                      structures and offers a good starting point for further
                      exploring dynamics in novel magnetic physics.[1] V. Hutanu ,
                      Journal of large-scale research facilities 1, A16.(2015)[2]
                      H. Thoma, W. Luberstetter, J. Peters and V. Hutanu, Journal
                      of Applied Crystallography, 51, 17-26 (2018).[3] V. Hutanu,
                      W. Luberstetter, E. Bourgeat-Lami, M. Meven et.al Review of
                      Scientific Instruments 87, 105108 (2016)},
      month         = {Aug},
      date          = {2018-08-22},
      organization  = {31st European Crystallographic
                       Meeting, Oviedo (Spain), 22 Aug 2018 -
                       27 Aug 2018},
      subtyp        = {After Call},
      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)6},
      url          = {https://juser.fz-juelich.de/record/859543},
}