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<p>With the increasing global demand for energy and the growing shortage of energy resources, the development of high-performance and cost-effective magnetic materials has become increasingly important. M-type strontium ferrite (SrFe<sub>12</sub>O<sub>19</sub>) has attracted extensive attention because of its excellent thermal stability and strong magnetic anisotropy. However, the intrinsic magnetic and magnetoelectric properties of conventional SrFe<sub>12</sub>O<sub>19</sub> still limit its further application in multifunctional devices. In this work, a Co–Ti co-doped SrFe<sub>12-2x</sub>Co<sub>x</sub>Ti<sub>x</sub>O<sub>19</sub> (<i>x</i> = 0–4) multiferroic liquid system was designed to regulate the electromagnetic properties of the material. The effects of dopant concentration on the dielectric, ferroelectric, and magnetoelectric coupling behaviors were systematically investigated. The results indicate that the sample with <i>x</i> = 2 exhibits the optimal performance, including the highest dielectric constant, enhanced polarization intensity, and a maximum magnetoelectric coupling coefficient of 188.93&#xa0;mV/(cm·Oe). These findings demonstrate that Co–Ti co-doping effectively enhances the magnetoelectric coupling characteristics of the SrFe<sub>12</sub>O<sub>19</sub> multiferroic liquid system, providing a promising strategy for the design and development of high-performance magnetic functional materials.</p>

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Mechanism of magnetoelectric coupling in Co–Ti co-doped SrFe12O19 multiferroic liquids

  • 期刊论文

  • 发表日期：

    2026年5月21日

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  • Jianghai Wang,
  • Shubao Yang,
  • Xiaoling Deng,
  • Huan Li,
  • Rongli Gao,
  • Wei Cai,
  • Chunlin Fu

摘要

With the increasing global demand for energy and the growing shortage of energy resources, the development of high-performance and cost-effective magnetic materials has become increasingly important. M-type strontium ferrite (SrFe12O19) has attracted extensive attention because of its excellent thermal stability and strong magnetic anisotropy. However, the intrinsic magnetic and magnetoelectric properties of conventional SrFe12O19 still limit its further application in multifunctional devices. In this work, a Co–Ti co-doped SrFe12-2xCoxTixO19 (x = 0–4) multiferroic liquid system was designed to regulate the electromagnetic properties of the material. The effects of dopant concentration on the dielectric, ferroelectric, and magnetoelectric coupling behaviors were systematically investigated. The results indicate that the sample with x = 2 exhibits the optimal performance, including the highest dielectric constant, enhanced polarization intensity, and a maximum magnetoelectric coupling coefficient of 188.93 mV/(cm·Oe). These findings demonstrate that Co–Ti co-doping effectively enhances the magnetoelectric coupling characteristics of the SrFe12O19 multiferroic liquid system, providing a promising strategy for the design and development of high-performance magnetic functional materials.