Dielectric, magnetic, and magnetodielectric change mechanisms in Y-type BaSrZn2Fe12O22 ceramics regulated by doping Al3+ and Ga3+ ions

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2024-09-30 DOI:10.1016/j.ceramint.2024.09.405

Meng Sun , Yang Yang , Jian-Ping Zhou , Qinghui Jiang , Weijia Wang , Xiao-ming Chen

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Abstract

We systematically investigated the dielectric, magnetic, and magnetodielectric (MD) properties of Y-type hexaferrite doped with Al³⁺ and Ga³⁺ ions. Al³⁺ ions preferentially enter the spin-up octahedral lattice sites while Ga³⁺ ions occupy the spin-down octahedral lattice sites first and then, enter the spin- octahedral sites with the increase in doping amount. The initial magnetization reaches saturation from outside of the hysteresis loops, exhibiting a non-collinear spin order. The step-like increase in magnetization with magnetic field indicates the ferroelectric changes in longitudinal conical spin order. The positive MD effect at low temperatures and the negative MD effect after warming for the doped samples are controlled by non-collinear spin ordering and electron hopping, respectively. The Al-doped and Ga-doped samples exhibit different ferroelectric behaviors driven by magnetic fields. Their ferroelectric phase diagrams were proposed on the basis of magnetic and MD properties. The results associate the physical properties with the doped ions in Y-type hexaferrite.

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掺杂 Al3+ 和 Ga3+ 离子调控 Y 型 BaSrZn2Fe12O22 陶瓷的介电、磁性和磁介电变化机制

我们系统地研究了掺杂 Al3+ 和 Ga3+ 离子的 Y 型六价铁氧体的介电、磁和磁介电（MD）特性。Al3+ 离子优先进入自旋向上的八面体晶格位点，而 Ga3+ 离子首先占据自旋向下的八面体晶格位点，然后随着掺杂量的增加进入自旋八面体位点。初始磁化在磁滞回线外达到饱和，表现出一种非共线的自旋顺序。磁化随磁场呈阶梯状增加，表明铁电体的纵向锥形自旋顺序发生了变化。掺杂样品在低温下的正 MD 效应和升温后的负 MD 效应分别由非共线自旋有序和电子跳跃控制。掺铝和掺镓样品在磁场驱动下表现出不同的铁电行为。根据磁性和 MD 特性提出了它们的铁电相图。结果将这些物理性质与 Y 型六价铁氧体中的掺杂离子联系起来。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.