The structure and magnetocaloric effect in the compounds were investigated by means of X-ray diffraction and magnetic measurements.

通过X射线衍射和磁性测量研究了样品的物相结构和磁热效应。

The scanning electron microscopy (SEM) has been used to observe the morphology of the samples. The vibrating sample magnetometer (VSM) has been applied to measure the magnetic properties and the magnetocaloric effect of the samples.

用X射线衍射实验(XRD)确定两个系列样品的钙钛矿结构,计算晶格常数和晶胞体积,用扫描电子显微镜(SEM)观察样品的形貌,用振动样品磁强计(VSM)测量样品的磁性能及磁卡效应。

In this thesis, the main work is to prepare amino-modified Fe3O4 nanoparticles and microspheres with a wide range particle size and to make some investigation on the magnetism and magnetocaloric effect of materials.

本论文的主要工作是采用水热／溶剂热合成方法制备了多种粒径的表面氨基修饰的纳米Fe304颗粒与微球,对这些材料的性质与磁热效应进行了研究。