How use ARCameraBackground material on other GameObject?

I want to use the ARCameraBackground material on an other GameObject.

I think on Android the material is called "Unlit/ARCoreBackground (Instance)".

This does not work:

Code (CSharp):

1. public GameObject MyARCamera;
2. var material = planeGo.GetComponentInChildren<MeshRenderer>().material;
3. material = MyARCamera.GetComponent<ARCameraBackground>().material;