Acknowledgments and additional funding details: Use of the Advanced Photon Source at Argonne National Laboratory was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. A portion of this research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. This work has been supported in part by the Croatian Science Foundation under Project No. IP-2020-02-9666. N.K.C.M. acknowledges the support of project Cryogenic Centre at the Institute of Physics-KaCIF, co-financed by the Croatian Government and the European Union through the European Regional Development Fund–Competitiveness and Cohesion Operational Programme (Grant No. KK.01.1.1.02.0012). The work at TU Wien was supported by the European Research Council (ERC Consolidator Grant No. 725521). The work at AGH University of Science and Technology was supported by the National Science Centre, Poland, Grant No. OPUS: UMO-2021/41/B/ST3/03454, the Polish National Agency for Academic Exchange under "Polish Returns 2019" Programme: PPN/PPO/2019/1/00014, and the subsidy of the Ministry of Science and Higher Education of Poland.

Data sets for original figures in the article 'Sawtooth lattice multiferroic BeCr2O4: Noncollinear magnetic structure and multiple magnetic transitions' published in Physical Review Materials 7, 024422 (2023). The file name of each xls file corresponds to the figure number in the published article. The files can be opened using the Excel program. If there are sub-figures, or multiple frames in each figure, the data of each sub-figure is stored in separate sheets within one xls file. The files with the file extension 'vesta' can be opened using the freely available program VESTA.