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000897116 037__ $$aFZJ-2021-03614
000897116 1001_ $$0P:(DE-Juel1)176326$$aThoma, Henrik$$b0$$eCorresponding author$$ufzj
000897116 1112_ $$aMLZ User Meeting 2019$$cMunich$$d2019-12-10 - 2019-12-11$$wGermany
000897116 245__ $$aPolarized neutron diffraction studies on weak ferromagnets at instrument POLI at MLZ
000897116 260__ $$c2019
000897116 3367_ $$033$$2EndNote$$aConference Paper
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000897116 520__ $$aPolarized neutron diffraction (PND) is a powerful method to investigate magnetic structures. PND can be used for very precise magnetization measurements even for weak magnetic contributions. It allows the high-quality determination of magnetic form factors, to untangle complex (e.g. chiral) magnetic structures, and to follow the movement of magnetic domains. By conserving the phase relation between the nuclear and magnetic structure, this technique is also a valuable tool to investigate the Dzyaloshinskii–Moriya interaction (DMI) [1], which is an important driving force in many magnetic materials including weak ferromagnets.Using the Flipping Ratio (FR) setup [2] of POLI [3] at MLZ, the magnetic structures of two prototypical weak ferromagnets, hematite (α-Fe2O3) and rhodochrosite (MnCO3), have been studied in detail as function of the applied magnetic field and temperature. This allowed us to determine the magnetic susceptibility tensor and, for the first time with neutrons, the absolute sign of the DMI in both compounds. Moreover, due to the large q-range access of POLI, we were able to reconstruct field induced magnetization density distribution maps by using the maximum entropy method.[1] V. E. Dmitrienko et al., Nat. Phys. 10, 202 (2014)[2] H. Thoma, W. Luberstetter, J. Peters, and V. Hutanu, J. Appl. Cryst. 51, 17-26 (2018)[3] V. Hutanu, Heinz Maier-Leibnitz Zentrum, Journal of large-scale research facilities, 1, A16 (2015)
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000897116 536__ $$0G:(DE-HGF)POF4-632$$a632 - Materials – Quantum, Complex and Functional Materials (POF4-632)$$cPOF4-632$$fPOF IV$$x1
000897116 65027 $$0V:(DE-MLZ)SciArea-170$$2V:(DE-HGF)$$aMagnetism$$x0
000897116 65017 $$0V:(DE-MLZ)GC-1604-2016$$2V:(DE-HGF)$$aMagnetic Materials$$x0
000897116 65017 $$0V:(DE-MLZ)GC-2002-2016$$2V:(DE-HGF)$$aInstrument and Method Development$$x1
000897116 693__ $$0EXP:(DE-MLZ)POLI-HEIDI-20140101$$1EXP:(DE-MLZ)FRMII-20140101$$5EXP:(DE-MLZ)POLI-HEIDI-20140101$$6EXP:(DE-MLZ)SR9a-20140101$$aForschungs-Neutronenquelle Heinz Maier-Leibnitz $$ePOLI: Polarized hot neutron diffractometer$$fSR9a$$x0
000897116 7001_ $$0P:(DE-Juel1)164298$$aHutanu, Vladimir$$b1$$ufzj
000897116 7001_ $$0P:(DE-Juel1)130504$$aAngst, Manuel$$b2$$ufzj
000897116 7001_ $$0P:(DE-HGF)0$$aRoth, Georg$$b3
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