中国物理B ›› 2021, Vol. 30 ›› Issue (3): 36201-.doi: 10.1088/1674-1056/abc67c

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  • 收稿日期:2020-06-25 修回日期:2020-09-29 接受日期:2020-10-31 出版日期:2021-02-22 发布日期:2021-02-22

Enhanced hyperthermia performance in hard-soft magnetic mixed Zn0.5CoxFe2.5-xO4/SiO2 composite magnetic nanoparticles

Xiang Yu(俞翔)†, Li-Chen Wang(王利晨)†, Zheng-Rui Li(李峥睿)†, Yan Mi(米岩), Di-An Wu(吴迪安), and Shu-Li He(贺淑莉)‡   

  1. 1 Department of Physics, Capital Normal University, Beijing 100048, China
  • Received:2020-06-25 Revised:2020-09-29 Accepted:2020-10-31 Online:2021-02-22 Published:2021-02-22
  • Contact: †These authors contributed equally to this work. ‡Corresponding author. E-mail: shulihe@cnu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 51771124, 51571146, and 51701130).

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Abstract: High quality Zn0.5CoxFe2.5-xO4 (x = 0, 0.05, 0.1, 0.15) serial magnetic nanoparticles with single cubic structures were prepared by the modified thermal decomposition method, and Zn0.5CoxFe2.5-xO4/SiO2 composite magnetic nanoparticles were prepared by surface modification of SiO2. The magnetic anisotropy of the sample increases with the increase of the doping amount of Co2+. When the doping amount is 0.1, the sample shows the transition from superparamagnetism to ferrimagnetism at room temperature. In the Zn0.5CoxFe2.5-xO4/SiO2 serial samples, the maximum value of specific loss power (SLP) with 1974 W/g metal can also be found at doping amount of x = 0.1. The composite nanoparticles are expected to be an excellent candidate for clinical magnetic hyperthermia.

Key words: magnetic nanoparticles, magnetic anisotropy, Zn0.5CoxFe2.5-xO4/SiO2, magnetic hyperthermia

中图分类号:  (Complex nanostructures, including patterned or assembled structures)

  • 62.23.St
75.47.Lx (Magnetic oxides) 76.60.Es (Relaxation effects)