Abstract
AbstractDy$$_{2}$$
2
Zr$$_{2}$$
2
O$$_{7}$$
7
a disordered pyrochlore system, exhibits the spin freezing behavior under the application of the magnetic field. We have performed detailed magnetic studies of Dy$$_{2-\textit{x}}$$
2
-
x
La$$_\textit{x}$$
x
Zr$$_{2}$$
2
O$$_{7}$$
7
to understand the evolution of the magnetic spin freezing in the system. Our studies suggest the stabilization of the pyrochlore phase with the substitution of non-magnetic La along with the biphasic mixture of fluorite and pyrochlore phases for the intermediate compositions. We observed that the spin freezing (T$$_{f}$$
f
$$\sim$$
∼
17 K) at higher La compositions (1.5 $$\le$$
≤
$$\textit{x}$$
x
$$\le$$
≤
1.99) is similar to the field-induced spin freezing for low La compositions (0 $$\le$$
≤
$$\textit{x}$$
x
$$\le$$
≤
0.5) and the well-known spin ice systems Dy$$_{2}$$
2
Ti$$_{2}$$
2
O$$_{7}$$
7
and Ho$$_{2}$$
2
Ti$$_{2}$$
2
O$$_{7}$$
7
. The low-temperature magnetic state for higher La compositions (1.5 $$\le$$
≤
$$\textit{x}$$
x
$$\le$$
≤
1.99) culminates into a spin-glass like state below 6 K. Cole–Cole plot and Casimir-du Pr$$\acute{e}$$
e
´
fit shows the narrow distribution of spin relaxation time in these compounds.
Publisher
Springer Science and Business Media LLC
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