CAJ | 학술논문

分别采用熔盐法和固相反应法制备了Ni3V2O8多铁材料样品，并利用X射线衍射(XRD)、扫描电子显微镜(SEM)、能谱（EDS）、透射电子显微镜(TEM)、高分辨透射电镜（HRTEM）等表征手段分析了所得样品的物相、微观形貌及结构，并研究了其磁学性能。实验结果表明，采用熔盐法和固相反应法制备的Ni3V2O8样品均为单一物相，呈正交对称型的晶体结构；熔盐法制备所得的样品呈棒状，颗粒直径约为20μm，长度约为100μm，单个晶粒呈明显的单晶特征；而固相反应法制备的Ni3V2O8样品呈颗粒状，颗粒尺寸约为25μm，分布较均匀。熔盐法制备的Ni3V2O8具有反铁磁性相变，相变温度在3.6 K左右，有效磁矩为3.34μB。
분별채용용염법화고상반응법제비료Ni3V2O8다철재료양품，병이용X사선연사(XRD)、소묘전자현미경(SEM)、능보（EDS）、투사전자현미경(TEM)、고분변투사전경（HRTEM）등표정수단분석료소득양품적물상、미관형모급결구，병연구료기자학성능。실험결과표명，채용용염법화고상반응법제비적Ni3V2O8양품균위단일물상，정정교대칭형적정체결구；용염법제비소득적양품정봉상，과립직경약위20μm，장도약위100μm，단개정립정명현적단정특정；이고상반응법제비적Ni3V2O8양품정과립상，과립척촌약위25μm，분포교균균。용염법제비적Ni3V2O8구유반철자성상변，상변온도재3.6 K좌우，유효자구위3.34μB。
TheNi3V2O8 multiferroic material samples were prepared by the molten salt synthesis and solid state reaction method, respectively. The phase composition, microstructure and crystal structure of the obtained samples as well as the magnetic properties were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), transmission electron microscopy (TEM) and the high resolution transmission electron microscopy (HRTEM). The results show that the obtained samples for both preparing methods are of single phase with orthorhombic symmetry. The microstructure analysis of the samples prepared by the molten salt synthesis reveal the well crystallized Ni3V2O8 polycrystalline samples. The Ni3V2O8 sample prepared by the molten salt synthesis method shows stick-like shape with about 20μm in diameter and about 100μm in length; the Ni3V2O8 sample prepared by the solid state reaction method shows well dispersed grain shape with an average particle size of about 25μm.The Ni3V2O8 sample prepared by the molten salt method has antiferromagnetic phase transition with temperature of 3.6 K and effective magnetic moment of 3.34μB.