Never mind, I just found the answer to my own question but I find it interesting none the less. So as the solution of the three metals cool if done correctly th

Never mind, I just found the answer to my own question but I find it interesting none the less. So as the solution of the three metals cool if done correctly the neodymium will come out of solution to form a mesh of neodymium around the grains of cerium and lanthanum in a similar way that pearlite forms from austinite and ferrite in steel. This will give them a "sponge" of neodymium to conduct the magnetic field but have the cerium and lanthanum act as filler. To explain what I am talking about way better than I ever could, this video is how heat treating steel will change it's properties and why different steels act the way they do. https://youtu.be/6jQ4y0LK1kY https://youtu.be/6jQ4y0LK1kY