Figure 1
From: Reversible tuning of magnetocaloric Ni-Mn-Ga-Co films on ferroelectric PMN-PT substrates
The influence of an applied electric field on the in-plane a and out-of-plane c lattice parameters of the PMN-PT substrate and the austenitic Ni-Mn-Ga-Co film was measured at 300 K (a), 320 K (b) and 355 K (c). Since the Ni-Mn-Ga-Co is martensitic at 300 K, only the PMN-PT is shown in (a). An in-plane contraction of the substrate and Ni-Mn-Ga-Co (black and blue, respectively) and an elongation in out-of-plane direction (red and orange for PMN-PT and Ni-Mn-Ga-Co, respectively) is visible. (a) to (c) have different x-axes but an identically scaled y-axis.
