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中文摘要：
通过水热合成得到石榴石型铁氧体材料Nd3-xSrxFe5O12（x=0.2,0.4,0.6,0.8）,经X射线粉末衍射分析确定样品属于立方晶系,Ia3d空间群,晶格常数a〉1.2600 nm.Mssbauer谱数据显示Sr2＋离子和Nd3＋离子共同占据十二面体C位,晶格中有少量Fe4＋离子生成.通过扫描电子显微镜观察到样品晶粒为菱形十二面体.高温M-T曲线和磁滞回线表明,4个样品的居里温度均在570 K左右,不因Sr2＋离子含量不同而改变;但是随着Sr2＋离子在晶格中含量的增加,样品的饱和磁化强度（Ms）下降,矫顽力（Hc）增大.
英文摘要：
Nd3-xSrxFe5O12（x=0.2,0.4,0.6,0.8） crystals,which are of cubic structure with the space group of Ia3d and lattice constants over 1.2600 nm,were synthesized using the hydrothermal method.Mssbauer spectroscopy demonstrates the coexistence of Sr2＋and Nd3＋ at the C sites of the dodecahedrons.The crystals also appear dodecahedrons with similar sizes as can be seen from the scanning electron microscopy（SEM） images.By recording the magnetic hysteresis loops and M-T curves at high temperature,we find that with the x increasing,saturation magnetization values decrease while the coercive forces go up.The Curie temperature of all the samples remain almost unchanged,namely 570 K,regardless of the x variation.
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