http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Synthesis and Magnetic Properties of DyMnO3 Nanoparticles in Mesoporous Silica
Takayuki Tajiri,Atsushi Kohno,Kenta Hamamoto,Yuhki Ando,Hiroyuki Deguchi,Masaki Mito 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.3
We synthesized nanoparticles of the perovskite manganite DyMnO3 in pores of mesoporous silicaSBA-15 and investigated their magnetic properties. X-ray diffraction patterns of the nanoparticlesindicated successful synthesis of the DyMnO3 nanoparticles with a particle size of about 10 nmin the pores of SBA-15. The temperature dependence of the DC magnetic susceptibility for theDyMnO3 nanoparticles exhibited a pronounced magnetic irreversibility between the field-coolingand the zero-field-cooling susceptibility due to the blocking phenomena and indicated a change ofthe magnetic exchange interactions from those for the bulk crystal. The in-phase susceptibility χ" and the out-of-phase susceptibility χ" of the AC susceptibility for the nanoparticles exhibited apeak at the blocking temperature, and that peak shifted toward higher temperature with increasingfrequency. Magnetization curves for the nanoparticles were reproduced by using a Langevin functionand exhibited a hysteresis loop at temperatures below the blocking temperature. Magnetic sizeeffects and superparamagnetic behaviors were observed in the DyMnO3 nanoparticles.