First-principles study of the electronic and magnetic properties of the spin-ladder iron oxide Sr3Fe2O5

First-principles study of the electronic and magnetic properties of the spin-ladder iron oxide Sr3Fe2O5
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自旋梯氧化铁Sr3Fe2O5电子和磁性能的第一性原理研究

DOI:
10.1039/c5ra22015g
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发表时间:
2016-01
期刊:
影响因子:
3.9
通讯作者:
Gao Faming
Gao Faming
中科院分区:
化学3区
文献类型:
--
作者:
Hao Xianfeng;Xu Yuanhui;Liu Shanshan;Wang Jing;Gao Faming

文献摘要

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采用广义梯度近似和库仑相互作用关联方法,研究了新型自旋梯型铁氧化物Sr 3Fe 2 O 5的电子和磁性.我们的研究结果表明,G型反铁磁配置是基态,这是在良好的协议与实验中子粉末衍射和穆斯堡尔谱测量,以及现有的理论结果在文献中,虽然与稍大的计算磁矩。此外,通过电子/自旋电荷在真实的空间中的特殊定位和取向,即,下自旋Fe 3d电子的dz 2轨道有序。
The electronic and magnetic properties of the novel spin-ladder iron oxide Sr3Fe2O5, containing an unusual square-planar coordination around high-spin Fe2+ cations, were investigated using the generalized gradient approximation plus the Coulomb interaction correlation method. Our results demonstrated that the G-type antiferromagnetic configuration is the ground state, which is in excellent agreement with experimental neutron powder diffraction and Mossbauer spectroscopy measurements, as well as available theoretical results in the literature, albeit with slightly larger computed magnetic moments. Moreover, the outstanding discrepancy between the two-dimensional crystal structure and the three-dimensional electronic/magnetic properties was resolved via the special localization and orientation of electronic/spin charge in real space, i.e., the dz2 orbital ordering of the down-spin Fe 3d electron.
DOI: 10.1103/physrevb.67.153106
发表时间: 2002-06
期刊: Physical Review B
影响因子: 3.7
作者:
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