Magnetic properties of Sm2(Fe1−xGax)17 (x=0−0.5) compounds and their nitrides
Magnetic properties of Sm2(Fe1−xGax)17 (x=0−0.5) compounds and their nitrides
复制标题
Sm2(Fe1−xGax)17 (x=0−0.5)化合物及其氮化物的磁性
DOI：
10.1063/1.358148
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发表时间：
1994
影响因子：
3.2
通讯作者：
P. Grimont
中科院分区：
文献类型：
--
作者：
G. Giammanco;V. Di Marco;I. Priolo;A. Intrivici;F. Grimont;P. Grimont
研究了Sm2(Fe1−xGax)17化合物及其氮化物的磁性能。用Ga代替Fe导致晶格常数的增加。氮的引入使晶格常数进一步增大。Ga取代Fe后，Sm2(Fe1−xGax)17化合物的居里温度发生了显著变化。当x=0.2时，居里温度提高约200k。Sm2(Fe1−xGax)17化合物排列样品的X射线衍射图表明，X =0.15、0.20和0.25合金在室温下表现出单轴各向异性。氮气的引入使x≤0.4的样品在室温下表现出单轴各向异性。氮化物的居里温度随Ga浓度的增加而降低。氮化物的各向异性场来源于高场磁化。讨论了氮化物及其母体化合物中Fe原子的磁各向异性、饱和磁化强度和矩随Ga浓度的变化。
Magnetic properties of Sm2(Fe1−xGax)17 compounds and their nitrides have been studied. Substitution of Ga for Fe leads to an increase in lattice constants. Introduction of nitrogen results in a further increase in lattice constants. Substitution of Ga for Fe causes a dramatic change of the Curie temperature of the Sm2(Fe1−xGax)17 compounds. When x=0.2 the Curie temperature is enhanced by about 200 K. X‐ray‐diffraction patterns of aligned samples of Sm2(Fe1−xGax)17 compounds show that alloys with x=0.15, 0.20, and 0.25 exhibit uniaxial anisotropy at room temperature. The introduction of nitrogen made the samples with x≤0.4 exhibit uniaxial anisotropy at room temperature. The Curie temperature of the nitrides decreases with the Ga concentration. The anisotropy fields of the nitrides derived from the high‐field magnetization. The changes of the magnetic anisotropy, saturation magnetization, and the moment of the Fe atoms in the nitrides and their parent compounds with Ga concentration are discussed.