中文摘要：

利用外磁场分离的方法从红条毛肤石鳖齿舌主侧齿中分离出纳米磁铁矿物质,通过采用扫描电子显微镜、高分辨透射电子显微镜、磁力显微镜及SQUID测量仪等研究了这些纳米磁铁矿在牙齿中的分布特点及晶体结构、磁学特性等物理特性。结果表明,这些纳米磁铁矿为长条片状、内部包含若干具有规则晶体结构的纳米小晶粒的磁铁矿Fe3O4,这些纳米磁铁矿晶体具有单磁畴结构,表现出良好的单轴单畴磁学特性,在牙齿中具有规则的分布特点,从而在石鳖齿舌中产生了独特的磁场分布。

英文摘要：

From the separating method by outer magnetic field the nanometer magnetite existing in the major lateral radula teeth of chiton Acanthochiton Rubrolinestus are extracted. Then by using the scanning electron microscope, the high resolution transmission electron microscopy, magnetic force microscopy and SQUID measurement instrument,the distribution of nanometer magnetite existing in the teeth,some physical characteristics of nanomagnetites including crystal structure,magnetic characteristics of nanomagnetites are studied. The results show that these nanometer magnetites are oblong sheetlike magnetites Fe3O4 with many little crystal grains with regular crystal structure in it,these nanomagnetites have single magnetic domain and show up good magnetic characteristics of single axis and single magnetic domain,they regularly distribute in the teeth,and so form special magnetic field in the radula of chiton.