Structural and magnetic properties of the solid solution series Sr2Fe1−xMxReO6(M = Cr, Zn)

Structural and magnetic properties of the solid solution series Sr2Fe1−xMxReO6(M = Cr, Zn)
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固溶体系列 Sr2Fe1âxMxReO6(M = Cr, Zn) 的结构和磁性能

DOI:
10.1039/b414182b
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发表时间:
2005
影响因子:
--
通讯作者:
W. Tremel
W. Tremel
中科院分区:
--
文献类型:
--
作者:
A. Jung;I. Bonn;V. Ksenofontov;G. Melnyk;J. Ensling;C. Felser;W. Tremel

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在研究掺杂双钙钛矿 Sr2Fe1−xMxReO6(0 ≤ x ≤ 1,M = Zn,Cr)时,发现电子、结构和磁性之间存在很强的相关性。范霍夫奇点和费米能级之间的相互作用对于磁特性起着至关重要的作用。母体化合物 Sr2FeReO6 的 Cr 掺杂导致饱和磁化强度的非单调行为,并且掺杂水平提高至 10%。居里温度从 401 K 单调增加到 616 K。相反,Zn 掺杂导致饱和磁化强度和居里温度连续下降。叠加在电子效应上的是结构影响,这可以通过公差因子 t 建模的尺寸效应来解释。对于 Cr 掺杂水平高于 40%,我们观察到四方-立方转变。对于 Zn 掺杂样品,四方畸变随着 Zn 含量的增加而线性增加。穆斯堡尔谱测定强烈影响结构的铁的价态为+2.7。
Strong correlations between the electronic, structural and magnetic properties have been found during the study of doped double perovskites Sr2Fe1−xMxReO6 (0 ≤ x ≤ 1, M = Zn, Cr). The interplay between the van Hove singularity and the Fermi level plays a crucial role for the magnetic properties. Cr doping of the parent compound Sr2FeReO6 leads to a non-monotonic behaviour of the saturation magnetization and an enhancement for doping levels up to 10%. The Curie temperatures monotonically increase from 401 to 616 K. In contrast, Zn doping leads to a continuous decrease in the saturation magnetization and the Curie temperatures. Superimposed on the electronic effects is the structural influence which can be explained by size effects modelled by the tolerance factor t. For Cr doping levels higher than 40% we observed a tetragonal–cubic transformation. For Zn doped samples the tetragonal distortion linearly increases with the increasing Zn content. The valence state of iron strongly influencing the structure was determined by Mössbauer spectroscopy to be +2.7.
Cr掺杂对Sr2(Fe1−xCrx)MoO6阳离子有序性和磁性能的影响
DOI: 10.1016/j.physb.2003.08.115
发表时间: 2004
影响因子: 2.8
作者:
X. M. Feng;G. Rao;Guotian Liu;H. Yang;Wenjie Liu;Z. Ouyang;Junjun Liang
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双钙钛矿 Ba2FeMoO6 在室温以上具有大的晶内磁阻
DOI: 10.1006/jssc.1998.8129
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影响因子: 5.4
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电荷分布对 Ba2FeMo1−xRexO6 双钙钛矿性能的关键作用
DOI: 10.1016/s0304-8853(02)00370-0
发表时间: 2002
影响因子: 2.7
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DOI: 10.1039/a706965k
发表时间: 1998-03-01
影响因子: --
作者:
Felser, C;Seshadri, R;Tremel, W
通讯作者: Tremel, W
DOI: 10.1038/27167
发表时间: 1998-10-15
期刊: NATURE
影响因子: 64.8
作者:
Kobayashi, KL;Kimura, T;Tokura, Y
通讯作者: Tokura, Y