Unable to use ngMaterial

[an-sandeepmallah]

Uncaught Error: [$injector:modulerr] Failed to instantiate module testApp due to:
Error: [$injector:modulerr] Failed to instantiate module ngMaterial due to:
Error: [$injector:nomod] Module 'ngMaterial' is not available! You either misspelled the module name or forgot to load it. If registering a module ensure that you specify the dependencies as the second argument.

My Angular module :
angular.module('testApp', ['ionic', 'ngCordova', 'ngResource', 'ngMaterial', 'ngAnimate', 'ngAria', 'ngSanitize'])