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oai:figshare.com:article/34070600 2026-10-05T15:14:09Z category_1 category_7 category_21 category_24 category_272 category_873 category_39 category_734 portal_63 item_type_3 month_year_10_2026

Multiferroic Semiconducting Behavior in Quasi-2D Cu-Based Hybrid Perovskites P. Biswal (25316330) Vikas (7455833) Ratnamay Kolay (24280613) Subhashis Ghosh (17144571) Amlandeep Nayak (25316333) Goutam Tripathy (25316336) Satyaprasad P. Senanayak (1926241) Ramesh Chandra Nath (24280616) Parthapratim Munshi (1472407) Debakanta Samal (10285528) Diptikanta Swain (1662508) Biophysics Medicine Biotechnology Evolutionary Biology Environmental Sciences not elsewhere classified Chemical Sciences not elsewhere classified Ecology Biological Sciences not elsewhere classified semiconducting functionalities within realizing multifunctional properties multiferroic semiconducting behavior intrinsic multiferroic semiconductors heat capacity anomalies conventional technological scaling compounds exhibit room bromobenzylammonium spacer breaks temperature magnon contributions nbr )< sub 9 </ sub 7 </ sub 2 </ sub 2d perovskite semiconductors 2 </ sup 2 +</ sup 4 </ sub temperature ferroelectricity single material results expand optoelectronic potential ligand tunability inversion symmetry integrate magnetic generating ferroelectricity ferromagnetism arises especially attractive br analogs br ). 15 k Developing multifunctional materials is crucial for overcoming the limitations of conventional technological scaling. Intrinsic multiferroic semiconductors are especially attractive because they integrate magnetic, ferroelectric, and semiconducting functionalities within a single material. Here, we demonstrate the intrinsic multiferroic semiconducting behavior and ligand tunability in two quasi-two-dimensional (2D) organic–inorganic hybrid perovskites, (C₇H₉NBr)₂CuX₄ (X = Cl, Br). Ferromagnetism arises from Cu²⁺ ions, while the 4-bromobenzylammonium spacer breaks the inversion symmetry, generating ferroelectricity. Long-range magnetic order emerges below 10 and 15 K for the Cl and Br analogs, respectively, corroborated by the heat capacity anomalies and low-temperature magnon contributions. Both compounds exhibit room-temperature ferroelectricity, establishing them as type-I multiferroics. Transport measurements reveal hole mobilities of ∼10^–4 cm² V^–1 s^–1, comparable to those of 2D perovskite semiconductors. Furthermore, the photoinduced dielectric enhancement across the full frequency range highlights their optoelectronic potential. These results expand the family of intrinsic multiferroic semiconductors and provide a platform for realizing multifunctional properties. 2026-10-05T00:00:00Z Dataset Dataset 10.1021/acs.jpcc.6c04839.s002 https://figshare.com/articles/dataset/Multiferroic_Semiconducting_Behavior_in_Quasi-2D_Cu-Based_Hybrid_Perovskites/34070600 CC BY-NC 4.0