2026/07/01 by Bocheng Yu, Anonymous, Otkur Omar +13
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Antiferromagnetism #Ferromagnetism #Hexagonal crystal system #Magnetic and transport properties of perovskites and related materials #Magnetism #Multiferroics and related materials #Perovskite (structure) #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1103/f6fj-gzjg
published as Phy. Rev. B 114, 074402 (2026) · 10 pages, 6 figures
arxiv created 2026/07/01 · openalex publication_date 2026/07/14 · openalex created_date 2026/07/15 · arxiv updated 2026/08/05 · openalex updated_date 2026/08/05
Exotic quantum phenomena are often found to occur in spin systems that exhibit low-dimensional magnetism. By combining nuclear magnetic resonance, neutron scattering, and muon-spin spectroscopy (μSR) techniques, we report a rare instance of strongly frustrated two-dimensional (2D) magnetism in a three-dimensional (3D) hexagonal perovskite. Here, Ba2La2MnTe2O12, a triangular-lattice magnet, is shown to undergo a magnetic transition at TN ≈ 4.4 K, below which the manganese moments form a 120∘ AFM order within the ab-plane, while staying disordered along the c-axis. This exotic ground state, which exhibits ideal 2D magnetism, is highly consistent with the persistently strong spin fluctuations and the large internal field distributions revealed by zero-field μSR. Further, the 2D magnetism also leads to a significant frustration, much larger than that of most known magnetically-ordered frustrated systems. Our work on Ba2La2MnTe2O12 not only challenges the interpretations of magnetic order in other 3D hexagonal perovskites, but it also provides insight into how the dimensionality affects the exotic magnetic states.