Annealing of a magnetic nanostructure is expected to not only change morphological features but also magnetic properties and hence magnetic hyperthermia applications. Using a simple co-precipitation method, annealed and non-annealed MWCNT/CoFe 2 O 4 nanocomposites have been synthesized, as confirmed by phases depicted in XRD. Here, a comparative study of morphological features, magnetic properties and heat dissipation capability of as-synthesized samples has been done. Transmission electron microscopy and scanning electron microscopy images reveal the agglomerated nature of the nanostructure. A visible shift in peak position of FTIR spectroscopy and Raman shift for annealed MWCNT/CoFe 2 O 4 nanocomposites from that of non-annealed MWCNT/CoFe 2 O 4 nanocomposites implies change in the vibrational features. As evident from vibrating sample magnetometer, coercivity and saturation magnetization increases for annealed MWCNT/CoF...

中文翻译：

---

退火对调节MWCNT / CoFe 2 O 4纳米复合材料磁热效率的影响

磁性纳米结构的退火不仅会改变形态特征，而且还会改变磁性，从而改变磁性热疗的应用范围。使用简单的共沉淀方法，已合成退火和未退火的MWCNT / CoFe 2 O 4纳米复合材料，这已通过XRD中描述的相证实。在此，对合成样品的形态特征，磁性能和散热能力进行了比较研究。透射电子显微镜和扫描电子显微镜图像揭示了纳米结构的团聚性质。与未退火的MWCNT / CoFe 2 O 4纳米复合材料相比，退火的MWCNT / CoFe 2 O 4纳米复合材料的FTIR光谱峰值位置和拉曼位移可见变化，这意味着振动特征发生了变化。