Journal article
Magnetic Order and Sign of the Dzyaloshinskii-Moriya Interaction in 2-D Antiferromagnet Ba2CoGe2O7 Under Applied Magnetic Field
IEEE transactions on magnetics, v 58(2), pp 1-5
01 Feb 2022
Abstract
The Dzyaloshinskii-Moriya interaction (DMI), i.e., the antisymmetric part of the exchange coupling tensor, favors the perpendicular arrangement of magnetic moment, thus inducing canting in otherwise collinear structures. The DMI is the prerequisite for the emergence of weak ferromagnetism in antiferromagnets, but can stabilize twisted magnetic textures, such as spin spirals, soliton lattices, and magnetic skyrmions. While the magnitude of the DMI determines the canting angle of adjacent spins, its sign dictates the sense of the spin rotation. Based on focused polarized neutron diffraction (PND) study, combined with symmetry analysis, we determine the sign of the DMI in the unconventional multiferroic Ba 2 CoGe 2 O 7 and reveal its detailed magnetic structure in magnetic fields applied in the tetragonal plane. As PND gives unique access to the scattering contribution from the phase-sensitive nuclear-magnetic interference, it is a valuable tool for a straightforward DMI sign determination in bulk materials and allows to disclose even very weak magnetic moments. Remarkably, the sign of the DMI could be determined from the PND measurement of a single reflection, which is demonstrated to be reliable for a large range of applied magnetic field directions and values.
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Details
- Title
- Magnetic Order and Sign of the Dzyaloshinskii-Moriya Interaction in 2-D Antiferromagnet Ba2CoGe2O7 Under Applied Magnetic Field
- Creators
- Henrik Thoma - Heinz Maier-Leibnitz ZentrumVladimir Hutanu - Heinz Maier-Leibnitz ZentrumRajesh Dutta - Institute of CrystallographyArsen Gukasov - Laboratoire Léon BrillouinVilmos Kocsis - RIKEN Center for Emergent Matter ScienceYusuke Tokunaga - RIKEN Center for Emergent Matter ScienceYasujiro Taguchi - RIKEN Center for Emergent Matter ScienceYoshinori Tokura - The University of TokyoIstvan Kezsmarki - Institute for PhysicsGeorg Roth - Institute of CrystallographyManuel Angst - Forschungszentrum Jülich
- Publication Details
- IEEE transactions on magnetics, v 58(2), pp 1-5
- Publisher
- IEEE
- Number of pages
- 5
- Grant note
- Tasso Springer Fellowship Program and the Jülich-Aachen Research Alliance (JARA) (10.13039/501100003163)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000745538100190
- Scopus ID
- 2-s2.0-85107232657
- Other Identifier
- 991022004773704721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Engineering, Electrical & Electronic
- Physics, Applied