Structural and magnetic characterizations of coprecipitated Ni-Zn and Mn-Zn ferrite nanoparticles

被引：32

作者：

Rao, B. Parvatheeswara ^{[1
]}

Kim, Chong-Oh

Kim, CheolGi

Dumitru, I.

Spinu, L.

Caltun, O. F.

机构：

[1] Chungnam Natl Univ, Res Ctr Adv Magnet Mat, Taejon 305764, South Korea

[2] Chungnam Natl Univ, Dept Mat Engn, Taejon 305764, South Korea

[3] Andhra Univ, Dept Phys, Waltair 530003, Andhra Pradesh, India

[4] Alexandru Ioan Cuza Univ, Dept Solid State & Theoret Phys, Iasi 700506, Romania

[5] Univ New Orleans, AMRE, New Orleans, LA 70148 USA

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2006年 / 42卷 / 10期

关键词：

coercivity; coprecipitation; ferromagnetic resonance linewidth and magnetic materials; magnetization; Ni-Zn and Mn-Zn ferrite nanoparticles;

D O I：

10.1109/TMAG.2006.879901

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Two mixed ferrite systems, namely Ni0.65Zn0.35Fe2O4 (Ni-Zn)andMn(0.75)Zn(0.18) Fe2.07O4 (Mn-Zn) have been prepared by coprecipitation method, and then the resulting ultrafine powders were heat treated at different temperatures from 200 to 800 degrees C for improved crystallinity and magnetic properties. The samples were characterized by X-ray diffraction, vibrating sample magnetometry, and ferro-magnetic resonance spectrometry. As a result of the heat treatment, the average particle size has been found to increase from 9.9 to 15.7 nm for Ni-Zn ferrites and from 2.4 to 10.2 nm for Mn-Zn ferrites, and the corresponding magnetization values have increased from 9.1 to 23 emu/g for Ni-Zn ferrites and from 7.9 to 11.7 emu/g for Mn-Zn ferrites, respectively. The results are discussed in the light of changes in particle size and inversion degree parameter for cationic distribution at nanoscales.

引用

页码：2858 / 2860

页数：3

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