Towards a full Heusler alloy showing room temperature half-metallicity at the surface
Towards a full Heusler alloy showing room temperature half-metallicity at the surface
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DOI：
10.1088/0022-3727/40/6/s05
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发表时间：
2007-03-21
影响因子：
3.4
通讯作者：
Aeschlimann, M.
中科院分区：
文献类型：
--
作者：
Cinchetti, M.;Wuestenberg, J.-P.;Aeschlimann, M.
在本文中，我们通过自旋分辨光发射研究了在具有10 nm Fe缓冲层的MgO（100）上异位外延生长的100 nm Co2Cr0.6Fe0.4Al薄膜中的表面自旋极化。我们证明，对样品表面进行仔细的原位制备可以使费米能级的室温自旋极化值高达 45%。据我们所知，这是迄今为止在室温下在全霍斯勒合金表面区域测得的最高值。
In this paper we investigate the surface spin polarization in a 100 nm Co2Cr0.6Fe0.4Al film grown ex situ epitaxially on MgO( 100) with a 10 nm Fe buffer layer by means of spin-resolved photoemission. We show that a careful in situ preparation of the sample surface leads to values for the room temperature spin polarization up to 45% at the Fermi level. To our knowledge, this is the highest value measured so far at the surface region of a full Heusler alloy at room temperature.