Nuclear resonance scattering study on the spin orientation in an epitaxial layer of Fe3O4 on MgO(100)
Nuclear resonance scattering study on the spin orientation in an epitaxial layer of Fe3O4 on MgO(100)
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MgO(100)上Fe3O4外延层自旋取向的核共振散射研究
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
L. Niesen
中科院分区：
文献类型：
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作者：
L. Kalev;L. Niesen
采用掠入射核共振散射（NRS）方法研究了分子束外延在MgO（100）衬底上生长的磁铁矿薄膜。我们表明，NRS数据产生更多的信息的方向自旋分布的形状比穆斯堡尔谱，其中只有相对于光子波矢量的平均角度可以测量。我们拟合我们的数据与微磁模型描述在磁铁矿薄膜的自旋取向。在该模型中，平均磁畴尺寸估计为106+/-6 nm。讨论了磁性薄膜的自旋结构与磁电阻的关系。
A thin magnetite film grown by molecular-beam epitaxy on MgO(100) was studied by nuclear resonant scattering (NRS) at grazing incidence geometry. We show that the NRS data yield more information about the shape of the directional spin distribution than Mossbauer spectroscopy, in which only the average angle with respect to the photon wave vector can be measured. We fit our data with a micromagnetic model describing the spin orientation in magnetite films. Within this model the average magnetic domain size is estimated to be 106+/-6 nm. The relation between the spin structure and the magnetoresistance in magnetite films is discussed.