Self-Assembly Design of a Robust 2D Frustrated Magnet with Bilayer Tetragonal Spin–Lattice

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2025-02-07 DOI:10.1021/acs.nanolett.4c05397

Jianpei Xing, Bo Zhao, Jinchao Kang, Yan Qi, Qinxi Liu, Xue Jiang, Jijun Zhao

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Abstract

We intentionally designed a stable two-dimensional (2D) bilayer dimer system, OsFeP₄, which serves as a tunable spin-5/2 J₁-J₂ anisotropic Heisenberg-like model to investigate frustrated magnetism. The frustrated state of 2D OsFeP₄ originates from the robust intradimer ferromagnetic (FM) exchange coupling (J_⊥) and a subtle competition between P₄ molecules mediating interdimer ferromagnetic (J_∥) and antiferromagnetic (AFM) exchange coupling (J_×). This is further supported by a significant broadening of the specific heat peak, a high frustration factor (θ_CW/T_N) of 4.17, the peak at the gamma point in the static structural factor, and short-range spin textures. Moreover, we employ strain to modulate the frustration parameter J_×/J_∥ from 0.23 to 0.4 and spin direction from in-plane to out-of-plane. The FM, AFM, and frustrated phase transitions are identified in the J_⊥–J_×–J_∥ ternary phase diagram. This work will enrich our understanding of the frustration mechanisms in the 2D limit.

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具有双层四方自旋晶格的坚固二维受挫磁体的自组装设计

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.