Magnetovolume and chemical bonding effects of Sn atom in the γ′-(Fe_(1-x)Sn_x)_4N compounds

作     者：ZHAOZhen－Jie XUEDe－Sheng 等 

作者机构：DepartmentofPhysicsKeyLaboratoryforOpticalandMagneticResonanceSpectroscopyEastChinaNormalUniversityShanghai200062 DepartmentofPhysicsLanzhouUniversityLanzhou730000 

出 版 物：《Nuclear Science and Techniques》 (核技术（英文）)

年 卷 期：2002年第13卷第1期

页      面：11-18页

核心收录：

学科分类：081704[工学-应用化学] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 070301[理学-无机化学] 0702[理学-物理学] 

基　　金：Supported by the National Natural Science Foundation of China the New Materials Center of Shanghai (99JC14 017) Shanghai 

主　　题：锡原子 磁体积效应 化学粘结效应 氮化铁 

摘      要：Combining x-ray diffraction and high pressure Mosshauer spectroscopy, the structure and the hyperfine parameters of Sn substituted for Fe in γ′-Fe4N were in- vestigated. The results of x-ray diffraction indicate that single phase γ′-(Fe1-xSnx )4N compounds can be synthesized in the composition range 0_≤x ≤ 0.3, and the lattice parameter can be well fitted with two linear formulas α0(x) = 3.795+0.019 × （0.0≤ x ≤0.10） and α0(x)= 3.795 + 0.228 × (x -0.1) (0.10 ≤ x ≤ 0.30) for different, content of Sn. Using high pressure Mossbauer spectra. the influences of the magnetovolume effect and the chemical bonding effect of Sn atom on the hyperfine magnetic field and the isomer shift were first distinguished. It is found that the magnetovolume and the chemical bonding have different influences on the properties of γ′-(Fe1-xSnx)4N, and the latter plays a more important role.