Qualitatively, what fundamental physical property stops a paramagnetic material from reaching a high magnetic saturation under an applied field? This question is similar to the one asked here: Why do paramagnetic materials require large fields to achieve magnetic saturation?.
I am given to understand that it's thermal fluctuations that prevent the magnetic moments of a paramagnetic material aligning, i.e. thermal fluctuations at room temperature have a significantly larger effect on electron spin orientation than an applied field. Is that accurate, or is there another physical principle that causes paramagnets to have such low susceptibility?