Scholarlink

<p>Interface in the metal (Me)-C<sub>60</sub> multilayer (ML) appears to be a unique means of controlling local electronic and magnetic properties of hybrid materials. The remarkable ability of the interface is discussed by Al Ma’Mari et al. (Nature 524:69, 2015), where a ferromagnetic (FM) state of the Cu-C<sub>60</sub> ML hybrid was found. In this work, we report the discovery of stable FM effects in the self-assembled (SA) Cu<sub><i>x</i></sub>C<sub>60</sub> hybrid system possessing a large and controllable fraction of self-organized interface formed between single-crystal Cu nanoparticles and the C<sub>60</sub> medium. Using SQUID magnetometry, we were able to confidently establish the magnetization hysteresis loops, which reflect the FM state of the SA Cu<sub><i>x</i></sub>C<sub>60</sub> hybrids even at room temperature. By applying the SA hybrid model, we performed the relevant normalizations of the magnetic curves, which allowed us to prove the decisive role of the interface Cu atoms in the FM magnetism of the SA hybrids. Field cooling (FC) of the SA sample to 2&#xa0;K in the field of 1&#xa0;T revealed a specific shift in the hysteresis loop, reflecting the exchange bias effect in the SA hybrid system. The anomalous increase in saturation magnetization in the SA hybrid after FC treatment indicates the magnetic effect of the C<sub>60</sub> monolayer pinned to the interfacial FM Cu layer by the exchange bias field. The obtained results designate the SA Cu<sub><i>x</i></sub>C<sub>60</sub> hybrids as multifunctional materials with tunable magnetism, promising for use in effective sensors and memory devices.</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

Emergent ferromagnetism and interface exchange bias in self-assembled copper-fullerene hybrid nanostructures

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年7月1日

查看全文
  • Vasily Lavrentiev,
  • Alexandr Stupakov,
  • Mariana Klementova,
  • Karla Kuldova,
  • Jiri Vacik,
  • Alexandr Dejneka

摘要

Interface in the metal (Me)-C60 multilayer (ML) appears to be a unique means of controlling local electronic and magnetic properties of hybrid materials. The remarkable ability of the interface is discussed by Al Ma’Mari et al. (Nature 524:69, 2015), where a ferromagnetic (FM) state of the Cu-C60 ML hybrid was found. In this work, we report the discovery of stable FM effects in the self-assembled (SA) CuxC60 hybrid system possessing a large and controllable fraction of self-organized interface formed between single-crystal Cu nanoparticles and the C60 medium. Using SQUID magnetometry, we were able to confidently establish the magnetization hysteresis loops, which reflect the FM state of the SA CuxC60 hybrids even at room temperature. By applying the SA hybrid model, we performed the relevant normalizations of the magnetic curves, which allowed us to prove the decisive role of the interface Cu atoms in the FM magnetism of the SA hybrids. Field cooling (FC) of the SA sample to 2 K in the field of 1 T revealed a specific shift in the hysteresis loop, reflecting the exchange bias effect in the SA hybrid system. The anomalous increase in saturation magnetization in the SA hybrid after FC treatment indicates the magnetic effect of the C60 monolayer pinned to the interfacial FM Cu layer by the exchange bias field. The obtained results designate the SA CuxC60 hybrids as multifunctional materials with tunable magnetism, promising for use in effective sensors and memory devices.