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arXiv 1712.09628cond-mat.mtrl-sci
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Cr间隔层对Fe/Gd多层膜结构和磁性的影响

Effect of Cr spacer on structural and magnetic properties of Fe/Gd multilayers

A. B. Drovosekov, M. V. Ryabukhina, D. I. Kholin, N. M. Kreines, E. A. Manuilovich, A. O. Savitsky, E. A. Kravtsov, V. V. Proglyado, V. V. Ustinov, T. Keller, Y… 展开作者

A. B. Drovosekov, M. V. Ryabukhina, D. I. Kholin, N. M. Kreines, E. A. Manuilovich, A. O. Savitsky, E. A. Kravtsov, V. V. Proglyado, V. V. Ustinov, T. Keller, Yu. N. Khaydukov, Y. Choi, D. Haskel

摘要:

在本工作中,我们分析了在Fe和Gd层之间的薄Cr间隔层对[Fe(35 A)/Cr(tCr)/Gd(50 A)/Cr(tCr)] x 12超晶格的结构和磁性的作用。利用X射线衍射、极化中子和共振X射线磁反射仪、SQUID磁强计、磁光克尔效应和铁磁共振技术研究了不含Cr间隔层(tCr=0)和具有薄tCr=4A的样品。在4- 300 K的温度范围内对样品的磁性进行了实验研究,并在平均场模型的基础上进行了数值模拟。我们表明,一个合理的协议与实验数据可以得到考虑温度依赖性的有效场参数在钆层。实验数据的分析表明,除了强烈减少Fe和Gd之间的反铁磁耦合,引入Cr间隔到Fe/Gd超晶格导致修改的铁磁层的结构和磁特性。

英文摘要:

In this work we analyse the role of a thin Cr spacer between Fe and Gd layers on structure and magnetic properties of a [Fe(35A)/Cr(tCr)/Gd(50A)/Cr(tCr)]x12 superlattice. Samples without the Cr spacer (tCr=0) and with a thin tCr=4A are investigated using X-ray diffraction, polarized neutron and resonance X-ray magnetic reflectometry, SQUID magnetometery, magneto-optical Kerr effect and ferromagnetic resonance techniques. Magnetic properties are studied experimentally in a wide temperature range 4-300K and analysed theoretically using numerical simulation on the basis of the mean-field model. We show that a reasonable agreement with the experimental data can be obtained considering temperature dependence of the effective field parameter in gadolinium layers. The analysis of the experimental data shows that besides a strong reduction of the antiferromagnetic coupling between Fe and Gd, the introduction of Cr spacers into Fe/Gd superlattice leads to modification of both structural and magnetic characteristics of the ferromagnetic layers.

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