Qiankun Qin, Afei Ding, W. L. Qubie, Pushpendra Kumar, Shixin Hu, Tianyang Yao and Junli Zhang
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引用次数: 0
摘要
具有非共轭磁性结构的材料因其独特的性能以及在先进自旋电子学和数据存储技术中的潜在应用而备受关注。在本研究中,我们研究了通过用二磁性 Sc3+ 离子取代 Fe3+ 离子,在 BaFe12O19(M 型)纳米晶体纤维中诱导出非共轭圆锥态。这种置换为调整磁性结构引入了一个额外参数,并允许精确控制置换量。我们证明,非共轭圆锥态在 125 K 至 325 K 的温度范围内保持稳定,并可通过改变 Sc3+ 取代量进行微调。Sc3+ 离子选择性地占据 M 型铁氧体晶格中的 2a、4f2 和 2b 位点,削弱了 Fe1、Fe2 和 Fe5 离子之间的超交换相互作用。这种弱化作用破坏了不同区块 S/R(R*/S*)之间的相互作用,并稳定了锥形状态。这些发现凸显了调控六方铁氧体非共轭磁性结构的重要方法,对新型磁性材料的基础研究和实际应用开发都具有重要意义。
Microstructure parameter-dependent non-collinear magnetic structures in scandium-doped M-type hexaferrite nanocrystals†
The quest for materials with non-collinear magnetic structures has been driven by their unique properties and potential applications in advanced spintronics and data storage technologies. In this study, we investigate the induction of a non-collinear conical state in BaFe12O19 (M-type) nanocrystal fibers through the substitution of Fe3+ ions with diamagnetic Sc3+ ions. This substitution introduces an additional parameter for tuning the magnetic structure and allows precise control over the substitution amount. We demonstrate that the non-collinear conical state remains stable within a temperature range of 125 K to 325 K and can be finely adjusted by varying the Sc3+ substitution amount. The selective occupancy of Sc3+ ions at the 2a, 4f2, and 2b sites within the M-type ferrite lattice weakens the super-exchange interaction between Fe1, Fe2, and Fe5 ions. This weakening disrupts interactions between different blocks S/R (R*/S*) and stabilizes the conical state. These findings highlight a significant approach to modulating non-collinear magnetic structures in hexagonal ferrites, with implications for both fundamental research and practical applications in the development of novel magnetic materials.
期刊介绍:
Nanoscale is a high-impact international journal, publishing high-quality research across nanoscience and nanotechnology. Nanoscale publishes a full mix of research articles on experimental and theoretical work, including reviews, communications, and full papers.Highly interdisciplinary, this journal appeals to scientists, researchers and professionals interested in nanoscience and nanotechnology, quantum materials and quantum technology, including the areas of physics, chemistry, biology, medicine, materials, energy/environment, information technology, detection science, healthcare and drug discovery, and electronics.