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Magnetic and Magnetocaloric Properties of Laves Phase Dy1−xGdx(Co1−xNix)2 Solid Solutions
Ist Teil von
Journal of low temperature physics, 2010-04, Vol.159 (1-2), p.37-41
Ort / Verlag
Boston: Springer US
Erscheinungsjahr
2010
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
We report magnetic and magnetocaloric properties of the polycrystalline series of Dy
1−
x
Gd
x
(Co
1−
x
Ni
x
)
2
(
x
=0.1, 0.2, 0.3, 0.4 and 0.5) solid solutions. The samples were characterized by powder X-ray diffraction patterns taken at room temperature and revealed that all the Dy
1−
x
Gd
x
(Co
1−
x
Ni
x
)
2
solid solutions consist of the C15 cubic Laves phase MgCu
2
type structure and a small amount of DyCo
3
and Dy
2
O
3
impurity phases. Magnetic measurements showed that the samples undergoes a second-order type phase transition at
T
C
<130 K, from paramagnetic to ferromagnetic state. Heat capacity measurements have been performed for all solid solutions and allowed us to determine the Debye temperature. The magnetocaloric effect has been studied by means of specific heat measurements in magnetic field 0.42, 1 and 2 T. The GdNi
2
substitution effect on magnetic and magnetocaloric properties will be discussed.