  In this note, we study solutions to semiclassical Schrodinger equations on a
real analytic manifold with a real analytic potential and prove the
semiclassical version of Cauchy estimates on derivatives. As an application, we
use Donnelly and Fefferman's method to prove the upper and lower bounds for
(n-1)-dimensional Hausdorff measure of the nodal sets of the solutions to
semiclassical Schrodinger equations.
