Hydrothermal synthesis, characterization, and magnetic properties of cobalt chromite nanoparticles

被引：26
|
作者：
Zakutna, D. [1 ,2 ]
Repko, A. [1 ]
Matulkova, I. [1 ]
Niznansky, D. [1 ,3 ]
Ardu, A. [4 ]
Cannas, C. [4 ]
Mantlikova, A. [2 ]
Vejpravova, J. [2 ]
机构：
[1] Charles Univ Prague, Fac Sci, Dept Inorgan Chem, Prague 12843 2, Czech Republic
[2] ASCR, Vvi, Inst Phys, Dept Magnet Nanosyst, Prague 18221 8, Czech Republic
[3] ASCR, Inst Inorgan Chem, Rez 25068, Czech Republic
[4] Univ Monserrato, Dipartimento Sci Chim, Univ Cagliari, I-09042 Monserrato, CA, Italy
来源：
JOURNAL OF NANOPARTICLE RESEARCH | 2014年 / 16卷 / 02期
关键词：
Cobalt chromite; Hydrothermal method; Nanoparticles; Size effect; Multiferroic materials; SURFACE SPIN DISORDER; GLASS BEHAVIOR; MNCR2O4; PHONON; STATE; ORDER;
D O I：
10.1007/s11051-014-2251-3
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The CoCr2O4 nanoparticles were prepared by hydrothermal treatment of chromium and cobalt oleates in a mixture of solvents (water and ethanol or pentanol) at various temperatures. The samples were further annealed at the temperatures from 300 to 500 A degrees C. The obtained nanoparticles were characterized using powder X-ray diffraction (PXRD), transmission electron microscopy (TEM), high-resolution TEM, scanning electron microscopy, thermogravimetric analysis, Raman and infrared spectroscopy, and magnetic measurements. The particle size, ranging from 4.4 to 11.5 nm, was determined from the TEM and PXRD methods. The tendency of particles to form the aggregates with the increasing annealing temperature has been observed. The magnetic measurements revealed that the typical features of the CoCr2O4 long-range magnetic order are suppressed in the nanoparticles.
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页数：14
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