TY - JOUR
T1 - Incommensurate magnetic orders and topological Hall effect in the square-net centrosymmetric EuGa2Al2 system
AU - Moya, Jaime M.
AU - Lei, Shiming
AU - Clements, Eleanor M.
AU - Kengle, Caitlin S.
AU - Sun, Stella
AU - Allen, Kevin
AU - Li, Qizhi
AU - Peng, Y. Y.
AU - Husain, Ali A.
AU - Mitrano, Matteo
AU - Krogstad, Matthew J.
AU - Osborn, Raymond
AU - Puthirath, Anand B.
AU - Chi, Songxue
AU - Debeer-Schmitt, L.
AU - Gaudet, J.
AU - Abbamonte, P.
AU - Lynn, Jeffrey W.
AU - Morosan, E.
N1 - J.M.M. was supported by the National Science Foundation (NSF) Graduate Research Fellowship under Grant No. DGE 1842494. E.M. and S.L. acknowledge support from U.S. DOE BES, Grant No. DE-SC0019503. K.J.A. was supported by NSF Grant No. DMR 1903741. XRD measurements were supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Grant No. DE-FG02-06ER46285. P.A. acknowledges the Gordon and Betty Moore Foundation's EPiQS Initiative through Grant No. GBMF9452. This research used resources at the High Flux Isotope Reactor, Oak Ridge National Laboratory, and the Advanced Photon Source, Argonne National Laboratory, which are DOE Office of Science User Facilities supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences. Work at the Materials Science Division, Argonne National Laboratory (single-crystal diffuse x-ray scattering), was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division. The use of the EPMA facility at the Department of Earth Science, Rice University, Houston, Texas, is kindly acknowledged. The identification of any commercial product or trade name does not imply endorsement or recommendation by the National Institute of Standards and Technology.
PY - 2022/7
Y1 - 2022/7
N2 - Neutron diffraction on the centrosymmetric square-net magnet EuGa2Al2 reveals multiple incommensurate magnetic states (AFM1, 2, 3) in zero field. In applied field, a new magnetic phase (A) is identified from magnetization and transport measurements, bounded by two of the μ0H=0 incommensurate magnetic phases (AFM1, helical, and AFM3, cycloidal) with different moment orientations. Moreover, magnetotransport measurements indicate the presence of a topological Hall effect, with maximum values centered in the A phase. Together, these results render EuGa2Al2 a material with noncoplanar or topological spin texture in applied field. X-ray diffraction reveals an out-of-plane (OOP) charge density wave (CDW) below TCDW∼50 K while the magnetic propagation vector lies in plane below TN=19.5 K. Together these data point to a new route to realizing in-plane noncollinear spin textures through an OOP CDW. In turn, these noncollinear spin textures may be unstable against the formation of topological spin textures in an applied field.
AB - Neutron diffraction on the centrosymmetric square-net magnet EuGa2Al2 reveals multiple incommensurate magnetic states (AFM1, 2, 3) in zero field. In applied field, a new magnetic phase (A) is identified from magnetization and transport measurements, bounded by two of the μ0H=0 incommensurate magnetic phases (AFM1, helical, and AFM3, cycloidal) with different moment orientations. Moreover, magnetotransport measurements indicate the presence of a topological Hall effect, with maximum values centered in the A phase. Together, these results render EuGa2Al2 a material with noncoplanar or topological spin texture in applied field. X-ray diffraction reveals an out-of-plane (OOP) charge density wave (CDW) below TCDW∼50 K while the magnetic propagation vector lies in plane below TN=19.5 K. Together these data point to a new route to realizing in-plane noncollinear spin textures through an OOP CDW. In turn, these noncollinear spin textures may be unstable against the formation of topological spin textures in an applied field.
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U2 - 10.1103/PhysRevMaterials.6.074201
DO - 10.1103/PhysRevMaterials.6.074201
M3 - Article
AN - SCOPUS:85135688245
SN - 2475-9953
VL - 6
JO - Physical Review Materials
JF - Physical Review Materials
IS - 7
M1 - 074201
ER -