Enhanced multiferroic properties of Bi0.89Tb0.11Fe0.96Mn0.02Co0.02O3/Zn1-xNixFe2O4 bilayer thin films by Ni2+-doped magnetic functional layer

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-09-23 DOI:10.1016/j.materresbull.2025.113802

Wenlong Liu, Jianbo Wang, Jiahua Wei, Di Li, Jin Zong, Qibin Yuan

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Abstract

In the field of multifunctional electronic components, multiferroic material which possesses both ferroelectricity and ferromagnetism has important application prospect. Here, the Bi_0.89Tb_0.11Fe_0.96Mn_0.02Co_0.02O₃/Zn_1-xNi_xFe₂O₄ (BTFMCO/ZN_xFO) bilayer thin films (x = 0.0, 0.1, 0.2, 0.3, 0.4) are fabricated by the sol-gel spin-coating technique. The influence of ZN_xFO magnetic layer on the structural, dielectric, ferroelectric, and ferromagnetic properties of the bilayer thin films is systematically investigated. The BTFMCO/ZN_0.2FO bilayer exhibits the lowest surface roughness (Ra=1.44 nm), a markedly reduced Fe²⁺concentration and minimized oxygen vacancy density, leading to a suppressed leakage current density of 3.7 × 10^–4 A/cm² at 200 kV/cm. Consequently, enhanced multiferroic properties with a ferroelectric remnant polarization (2P_r) of 118.5 µC/cm² and saturation magnetization (M_s) of 63.2 emu/cm³, respectively, are observed in the BTFMCO/ZN_0.2FO sample. These findings reveal that interfacial modulation via Ni²⁺-doped ZN_xFO layers is an effective strategy to simultaneously enhance ferroelectric and ferromagnetic performance.

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Ni2+掺杂磁功能层增强Bi0.89Tb0.11Fe0.96Mn0.02Co0.02O3/Zn1-xNixFe2O4双层薄膜的多铁性

在多功能电子元器件领域，兼具铁电性和铁磁性的多铁性材料具有重要的应用前景。采用溶胶-凝胶自旋镀膜技术制备了Bi0.89Tb0.11Fe0.96Mn0.02Co0.02O3/Zn1-xNixFe2O4 （BTFMCO/ZNxFO）双层薄膜（x = 0.0, 0.1, 0.2, 0.3, 0.4）。系统地研究了ZNxFO磁层对双层薄膜结构、介电、铁电和铁磁性能的影响。BTFMCO/ZN0.2FO双分子层表面粗糙度最低（Ra=1.44 nm）， Fe2+浓度显著降低，氧空缺密度最小，在200 kV/cm下抑制泄漏电流密度为3.7 × 10-4 a /cm2。结果表明，BTFMCO/ZN0.2FO样品的铁电残余极化（2Pr）为118.5µC/cm²，饱和磁化强度（Ms）为63.2 emu/cm³，多铁性得到了增强。这些发现表明，通过Ni2+掺杂ZNxFO层进行界面调制是同时提高铁电和铁磁性能的有效策略。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.