- Tytuł:
- Andreev Reflection Spectroscopy Study of Spin Polarization in Co₂Cr(Fe)Al Heusler Alloys
- Autorzy:
-
Hašková, V.
Szabó, P.
Kováč, J.
Ryba, T.
Vargová, Z.
Varga, R. - Powiązania:
- https://bibliotekanauki.pl/articles/1385695.pdf
- Data publikacji:
- 2015-02
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
72.25.Ba
74.45.+c
77.80.bg - Opis:
- The present paper is dealing with the experimental study of the influence of Fe substitution on the Curie temperature and spin polarization in Co₂CrAl Heusler alloys. A recently successfully introduced new rapid quenching method has been used for the preparation of Co₂CrAl and $Co₂Cr_{0.6}Fe_{0.4}Al$ ribbon samples. The Curie temperatures have been determined from magnetization measurements being 378 K for Co₂CrAl and much above 400 K for $Co₂Cr_{0.6}Fe_{0.4}Al$. The spin polarization parameter P₀ of the studied samples has been estimated from point-contact Andreev reflexion spectroscopy measurements. In pure Co₂CrAlP₀ = 0.5 - 0.9, and in the case of $Co₂Cr_{0.6}Fe_{0.4}AlP₀$ = 0.4 - 0.9. Hence, it is shown that Fe substitution of Cr in $Co₂Cr_{1-x}FeₓAl$ Heusler alloys at a concentration of x=0.4 significantly increase the Curie temperature without marked influence on the spin polarization.
- Źródło:
-
Acta Physica Polonica A; 2015, 127, 2; 377-378
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł