While there are commercial rooting hormones available online, there are many youtube videos which claim that aloe vera can be used for plant propagation.
There are a large number of video on rose plant propagation from rose stems using various methods like potato, aloe vera plant.
In some videos, the rose plant stem cutting is placed in a piece of aloe vera leaf.
In other videos the aloe vera gel is extracted from the leaf, and the stem cutting is placed in a solution with the gel.
Almost all videos show the stem getting roots and leaves.