Resumen: We report long periodic chiral helimagnetic orderings in ferromagnetic inorganic compounds CrM 3S6 (M = Nb and Ta) with a chiral space group of P6322. Magnetization in polycrystalline samples and high resolution powder neutron diffraction were measured. Our powder neutron diffraction measurements in CrM 3S6 successfully separated nuclear and magnetic satellite peaks, having the period of hundreds of angstroms along the c-axis. Therefore, we propose that the magnetic ordering in ferromagnetic CrM3S6 is not ferromagnetic, but long periodic chiral helimagnetic ordering. Idioma: Inglés DOI: 10.1088/1742-6596/746/1/012061 Año: 2016 Publicado en: Journal of physics. Conference series 746, 1 (2016), 012061 [6 pp] ISSN: 1742-6588 Factor impacto SCIMAGO: 0.24 - Physics and Astronomy (miscellaneous) (Q3)