Magnetism and Structure of Magnetic Multilayers Based on the Fully Spin Polarized Heusler Alloys Co2MnGe and Co2MnSn
Magnetism and Structure of Magnetic Multilayers Based on the Fully Spin Polarized Heusler Alloys Co2MnGe and Co2MnSn
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基于全自旋极化Heusler合金Co2MnGe和Co2MnSn的磁性多层膜的磁性和结构
DOI：
10.1002/chin.200622218
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
H. Zabel
中科院分区：
文献类型：
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作者：
K. Westerholt;A. Bergmann;J. Grabis;A. Nefedov;H. Zabel
我们的介绍开始与一个简短的一般性审查的磁性和结构性质的赫斯勒化合物正在讨论这本书。然后，更具体地说，我们来讨论我们的实验结果组成的多层膜的Heusler合金Co 2 MnGe和Co 2 MnSn与V或Au作为中间层。我们采用联合收割机结合磁化和磁阻测量，x射线衍射和反射率，软x射线磁性圆二色性和自旋极化中子反射率的实验方法。我们发现，低于一个临界厚度的赫斯勒层在典型的dcr = 1.5 nm的铁磁秩序丢失和自旋玻璃秩序发生。对于非常薄的铁磁Heusler层有特殊性的磁秩序是不寻常的，当与传统的铁磁过渡金属多层系统相比。在[Co2 MnGe/Au]多层膜中，由于界面处的自旋玻璃有序化，在低温下铁磁磁滞回线处存在交换偏置位移。在[Co2 MnGe/V]多层膜中，我们观察到一个反铁磁层间长程有序低于一个定义良好的Neel温度起源于偶极杂散场在磁性粗糙的Heusler层界面。
Our Introduction starts with a short general review of the magnetic and structural properties of the Heusler compounds which are under discussion in this book. Then, more specifically, we come to the discussion of our experimental results on multilayers composed of the Heusler alloys Co2MnGe and Co2MnSn with V or Au as interlayers. The experimental methods we apply combine magnetization and magneto-resistivity measurements, x-ray diffraction and reflectivity, soft x-ray magnetic circular dichroism and spin polarized neutron reflectivity. We find that below a critical thickness of the Heusler layers at typically dcr = 1.5 nm the ferromagnetic order is lost and spin glass order occurs instead. For very thin ferromagnetic Heusler layers there are peculiarities in the magnetic order which are unusual when compared to conventional ferromagnetic transition metal multilayer systems. In [Co2MnGe/Au] multilayers there is an exchange bias shift at the ferromagnetic hysteresis loops at low temperatures caused by spin glass ordering at the interface. In [Co2MnGe/V] multilayers we observe an antiferromagnetic interlayer long range ordering below a well defined Neel temperature originating from the dipolar stray fields at the magnetically rough Heusler layer interfaces.
DOI：
10.1143/jjap.42.l419
发表时间：
2003-04-15
期刊：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS
影响因子：
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作者：
Inomata, K;Okamura, S;Tezuka, N
通讯作者：
Tezuka, N