Effect of plasma treatment on magnetic properties and heating efficiency of Ni-Zn nanoparticles

被引：12

作者：

Kim, Hyung Joon ^{[1
]}

Choi, Hyunkyung ^{[2
]}

机构：

[1] LG Chem Res Pk, Basic Mat & Chem R&D Ctr, Daejeon 34122, South Korea

[2] Kookmin Univ, Dept Phys, Seoul 02707, South Korea

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2019年 / 484卷

关键词：

Hyperthermia; Magnetic nanoparticles; Mossbauer spectroscopy; Plasma; HYPERTHERMIA; RELAXATION; MOSSBAUER; OXIDE; TIME;

D O I：

10.1016/j.jmmm.2019.03.102

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The magnetic properties and AC heating characteristics of Ni(1-x)ZnxFe(2)O(4) nanoparticles were investigated. Magnetization measurements conducted on various sample compositions revealed that the magnetization of the nanoparticles was maximum for x= 0.75 sample. Ni0.25Zn0.75Fe2O4 nanoparticles were exposed to plasma for 30 min. The resultant, magnetization (M), blocking temperature (TB), superparamagnetic transition temperature (Tm), heating temperature, and specific absorption rate (SAR) of Ni0.25Zn0.75Fe2O4 nanoparticles before and after plasma treatment showed that the plasma treatment enhanced the magnetic and thermal properties. To determine the improved characteristics in more detail, we obtained Mossbauer spectra at various temperatures. Analysis of the Mossbauer spectra of Ni0.25Zn0.75Fe2O4 nanoparticles revealed two sets of six lines for tetrahedral (A) and octahedral (B) sites. Also, Mossbauer spectra with an external field up to 1 T were performed and the spin canting angles in Ni0.25Zn0.75Fe2O4 before and after plasma treatment were determined.

引用

页码：14 / 20

页数：7

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