Correction to “An Air-Stable and Exfoliable Ferromagnetic Two-Dimensional Perovskite, (Phenethylammonium)2CrCl4”

Abstract

The authors regret an error in the reported orientation of the magnetic easy axis of (PEA)₂CrCl₄. The original report stated that the magnetic easy axis was oriented in the ab plane, bisecting the angle defined by the a and b axes, but the correct orientation is bisecting the Cr²⁺ molecular axes. The following corrections are required in the text: Page 1574, paragraph 2, sentence 2 now reads, “Figure 5a plots field-cooled (FC) and zero-field-cooled (ZFC) molar susceptibility (χ) vs temperature for a single crystal with a 0.01 T magnetic field oriented in the crystallographic ab plane (H ⊥ c), bisecting the angle defined by the Cr²⁺ molecular axes (φ = 45°).” Page 1574, paragraph 2, sentence 5 now reads, “Magnetic measurements with the field oriented perpendicular to the ab plane (H || c) show a similar temperature dependence but much smaller χ (Figure 5b), and those with the magnetic field oriented along the Cr–Cl bonds (H ⊥ c, φ = 0° or 90°) also show small χ (Figure S7).” Page 1574, paragraph 2, sentence 6 now reads, “These data indicate in-plane magnetic ordering with easy axes bisecting the angles defined by the Cr²⁺ molecular axes, parallel to the a or b crystallographic axes, as illustrated in the inset of Figure 5c.” Figure 5. Magnetic data for a (PEA)₂CrCl₄ single crystal. (a) Field-cooled (FC) and zero-field-cooled (ZFC) susceptibility, measured with H = 0.01 T applied in the ab plane (H ⊥ c), bisecting the angle defined by the Cr²⁺ molecular axes (φ = 45°). The inset shows the derivative of the FC data, yielding an ordering temperature of T_C = 44 K. (b) FC and ZFC susceptibility data collected with an applied magnetic field oriented perpendicular to the crystallographic ab plane and parallel to the c axis (H || c). (c) Field-sweep magnetization data measured from −14 to +14 T at different temperatures. The inset illustrates the in-plane magnetic-field (H ⊥ c, φ = 45°) orientation, coinciding with a magnetic easy axis. (d) An expanded view of the data from Figure 5c, showing magnetic hysteresis at low temperatures. The inset in Figure 5c and text in Figure S7d also require correction. The corrected figures and captions are included below. The authors apologize for any confusion caused. The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acs.chemmater.4c03441. Corrected Figure S7 (PDF) Most electronic Supporting Information files are available without a subscription to ACS Web Editions. Such files may be downloaded by article for research use (if there is a public use license linked to the relevant article, that license may permit other uses). Permission may be obtained from ACS for other uses through requests via the RightsLink permission system: http://pubs.acs.org/page/copyright/permissions.html. This article has not yet been cited by other publications.