Magnetic and Mossbauer spectroscopic studies of NiZn ferrite nanoparticles synthesized by a combustion method

被引：39
|
作者：
Sreeja, V. [1 ]
Vijayanand, S. [1 ]
Deka, S. [1 ]
Joy, P. A. [1 ]
机构：
[1] Natl Chem Lab, Phys & Mat Chem Div, Pune 411008, Maharashtra, India
来源：
HYPERFINE INTERACTIONS | 2008年 / 183卷 / 1-3期
关键词：
Ferrite; Nanoparticles; Magnetic properties; Mossbauer spectroscopy;
D O I：
10.1007/s10751-008-9736-3
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
The properties of nanocrystalline Ni0.5Zn0.5Fe2O4 synthesized by an auto-combustion method have been investigated by magnetic measurements and Mossbauer spectroscopy. The as-synthesized single phase nanosized ferrite powder is annealed at different temperatures in the range 673-1,273 K to obtain nanoparticles of different sizes. The powders are characterized by powder X-ray diffraction, vibrating sample magnetometer, transmission electron microscopy and Mossbauer spectroscopy. The as-synthesized powder with average particle size of similar to 9 nm is superparamagnetic. Magnetic transition temperature increases up to 665 K for the nanosized powder as compared to the transition temperature of 548 K for the bulk ferrite. This has been confirmed as due to the abnormal cation distribution, as evidenced from room temperature Mossbauer spectroscopic studies.
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收藏
页码：99 / 107
页数：9
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