Direct observation of high spin polarization in Co(2)FeAl thin films.
Direct observation of high spin polarization in Co(2)FeAl thin films.
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直接观察 Co2FeAl 薄膜中的高自旋极化
DOI:
10.1038/s41598-018-26285-9
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发表时间:
2018-05-23
影响因子:
4.6
通讯作者:
Xu Y
中科院分区:
文献类型:
--
作者:
Zhang X;Xu H;Lai B;Lu Q;Lu X;Chen Y;Niu W;Gu C;Liu W;Wang X;Liu C;Nie Y;He L;Xu Y
We have studied the Co2FeAl thin films with different thicknesses epitaxially grown on GaAs (001) by molecular beam epitaxy. The magnetic properties and spin polarization of the films were investigated byin-situmagneto-optic Kerr effect (MOKE) measurement and spin-resolved angle-resolved photoemission spectroscopy (spin-ARPES) at 300 K, respectively. High spin polarization of 58% (±7%) was observed for the film with thickness of 21 unit cells (uc), for the first time. However, when the thickness decreases to 2.5 uc, the spin polarization falls to 29% (±2%) only. This change is also accompanied by a magnetic transition at 4 uc characterized by the MOKE intensity. Above it, the film’s magnetization reaches the bulk value of 1000 emu/cm3. Our findings set a lower limit on the thickness of Co2FeAl films, which possesses both high spin polarization and large magnetization.
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影响因子:
16.6
作者:
Jourdan, M.;Minar, J.;Braun, J.;Kronenberg, A.;Chadov, S.;Balke, B.;Gloskovskii, A.;Kolbe, M.;Elmers, H. J.;Schoenhense, G.;Ebert, H.;Felser, C.;Klaeui, M.
通讯作者:
Klaeui, M.
影响因子:
3.7
作者:
Fetzer, Roman;Wuestenberg, Jan-Peter;Cinchetti, Mirko
通讯作者:
Cinchetti, Mirko
影响因子:
2.7
作者:
Wang, Xiaotian;Li, Yueqing;Wu, Guangheng
通讯作者:
Wu, Guangheng
影响因子:
3.7
作者:
Xu, YB;Kernohan, ETM;Bland, JAC
通讯作者:
Bland, JAC
影响因子:
3.2
作者:
Claydon, Jill S.;Hassan, Sameh;van der Laan, Gerrit
通讯作者:
van der Laan, Gerrit