亚稳态化合物Ce_2Fe_(23)B_3的结构与磁性

STRUCTURE AND MAGNETIC PROPERTIES OF METASTABLE COMPOUND Ce_2Fe_(23)B3

研究了非晶态Ce_2Fe_(23)B_3合金的晶化以及亚稳态化合物Ce_2Fe_(23)B_3的结构与磁性XRD分析证实,Ce_2Fe_(23)B_3为bcc结构,晶格常数α=1.417nm由Ce_2Fe_(23)B_3的室温Mossbauer谱,确定不同Fe位Fe原子磁矩的大小依次为:μFe(48e_1)>μFe(48e_2)>μFe(48e_3)>μFe(16c)>μFe(24d),平均每个Fe原子和Ce原子的磁矩分别为1.94和0.

Crystallization of amorphous Ce_2Fe_(23)B_3 alloys as well as structure and mag-netic properties of metastable compound Ce_2Fe_(23)B_3 were studied. X-ray diffraction analysisconfirmed that the crystal structure of Ce_2Fe_(23)B_3 compound is body-centered cubic, its lat-tice constant α=1.417 nm. Measurement of room temperature hyperfine field ofCe_2Fe_(23)B_3 observeed that the size of Fe magnetic moment in different Fe site is orderlyμ_(Fe)(48e_1)>μ_(Fe)(48e_2)>μ_(Fe)(48e_3)>μ_(Fe)(16c)>μ_(Fe)(24d). Average magnetic moments per Fe atomand per Ce atom are 1.94 and 0.85μ_B respectively.