Scholarlink

<p>In this work, the dielectric behavior and thermal stability of the <i>C</i>5<i>S</i>4 structure is studied within the Blume–Capel framework, by modeling the nanostructure as a mixed-spin core–shell nanostructure. The magnetic formalism of the model is adapted to describe dielectric properties, taking into consideration the effect of an external electric field on the polarization of the nanostructure. The ground-state phase diagram consists of several stable and electrically symmetric spin configurations. A ferrielectric ordered phase with evident first-order phase transition occurs at a very low temperature, driving the polarization of the shell. Besides, a reentrant dielectric transition occurs in specific ranges of intermediate temperature. The analysis of key interaction parameters has revealed that intra-core coupling and the external electric field increase the thermal stability of the ferrielectric phase, while the crystal-field anisotropy and inter-sublattice coupling weaken it. These results are of some usefulness in understanding the stability mechanism of ferrielectric core–shell structures and supporting their use in tunable nano-memory and functional dielectric materials.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Monte Carlo investigation of magnetic–dielectric analogies in hexagonal mixed-spin core–shell nanostructures

  • 期刊论文

  • 发表日期：

    2026年3月24日

查看全文
  • L. Ouzaroual,
  • M. Naziruddin Khan,
  • Z. Fadil,
  • H. Kerrai,
  • E. Salmani,
  • Abdulrahman A. Alsayyari,
  • Chaitany Jayprakash Raorane,
  • Seong-Cheol Kim

摘要

In this work, the dielectric behavior and thermal stability of the C5S4 structure is studied within the Blume–Capel framework, by modeling the nanostructure as a mixed-spin core–shell nanostructure. The magnetic formalism of the model is adapted to describe dielectric properties, taking into consideration the effect of an external electric field on the polarization of the nanostructure. The ground-state phase diagram consists of several stable and electrically symmetric spin configurations. A ferrielectric ordered phase with evident first-order phase transition occurs at a very low temperature, driving the polarization of the shell. Besides, a reentrant dielectric transition occurs in specific ranges of intermediate temperature. The analysis of key interaction parameters has revealed that intra-core coupling and the external electric field increase the thermal stability of the ferrielectric phase, while the crystal-field anisotropy and inter-sublattice coupling weaken it. These results are of some usefulness in understanding the stability mechanism of ferrielectric core–shell structures and supporting their use in tunable nano-memory and functional dielectric materials.