- Tytuł:
- Giant Magnetoresistance in Melt-Spun Co-Cu Modified by Rare Earths
- Autorzy:
-
Idzikowski, B.
Rössler, U. K.
Handstein, A.
Nenkov, K.
Müller, K.-H. - Powiązania:
- https://bibliotekanauki.pl/articles/2013425.pdf
- Data publikacji:
- 2000-05
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
75.70.Pa
75.50.Tt - Opis:
- Samples of the composition RE$\text{}_{x}$Co$\text{}_{20}$Cu$\text{}_{80-x}$, RE = Sm, Gd or Dy (x = 0, 1, and 3) were produced by melt-spinning and subsequent annealing. The magnetoresistance is negative as in granular Co-Cu, but its values depend on the kind of rare earth element added and on changes in the microstructure induced by thermal annealing. An addition of 1 at.% rare earth metal to Co$\text{}_{20}$Cu$\text{}_{80}$ yields a considerable increase in the magnetoresistance ratio, whereas an addition of 3 at.% causes a decrease. E.g., by addition of 1 at.% Dy to Co$\text{}_{20}$Cu$\text{}_{80}$ and optimal thermal treatment, the value of magnetoresistance ratio measured at 10 K in a field of 5 T increases from -14% to -28%. The effect can be attributed to the presence of clusters of hexagonal Dy(Co,Cu)$\text{}_{5}$, which was ascertained from X-ray diffraction data, or other, metastable rare-earth compounds and paramagnetic rare-earth atoms in the Cu matrix.
- Źródło:
-
Acta Physica Polonica A; 2000, 97, 5; 791-794
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł