Effect of Cr3+ Doping on Magnetic Properties of Zn-Mg Ferrite Nanoparticles

被引：3

作者：

Yu, Xiaogang ^{[1
,2
]}

Yang, Renpeng ^{[1
]}

Wu, Chengwei ^{[1
]}

Liu, Bo ^{[2
]}

Zhang, Wei ^{[1
]}

机构：

[1] Dalian Univ Technol, Dept Engn Mech, State Key Lab Struct Anal Optimizat & CAE Software, Dalian 116024, Peoples R China

[2] Dalian Univ Technol, Sch Biomed Engn, Dalian 116024, Peoples R China

来源：

MAGNETOCHEMISTRY | 2023年 / 9卷 / 07期

关键词：

magnetic nanoparticles; Curie temperature; hyperthermia; HYPERTHERMIA; SUBSTITUTION; ION; ACID;

D O I：

10.3390/magnetochemistry9070181

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Zn0.6Mg0.4CrxFe2-xO4 (0 & LE; x & LE; 0.4) nanoparticles were synthesized using a hydrothermal technique. The obtained magnetic nanoparticles (MNPs) exhibited a spinel structure, where the lattice constant decreased with the Cr3+ ion content. The doping of Cr3+ ion (x = 0.1) increased the specific saturation magnetization to 46.4 emu/g but decreased to 20.0 emu/g with the further increase in the Cr3+ ion content to x = 0.4. The decrement in Curie temperature was ascribed to the weakened super-exchange interaction between the metal ions located at A-sites and B-sites, which arose from the doping of the Cr3+ ion. The T-2-weighted images gradually darkened with the increase in Zn0.6Mg0.4Cr0.1Fe1.9O4 nanoparticles concentration, suggesting that the nanoparticles can enhance the image contrast. Zn0.6Mg0.4CrxFe2-xO4 (0 & LE; x & LE; 0.4) nanoparticles were able to heat the agar phantom to the hyperthermia temperature under the safe alternating magnetic field, which showed their potential in the magnetic induction hyperthermia.

引用

页数：10

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