Complex sentence: The domain structure of actual magnetic materials does not usually form by the process of large domains splitting into smaller ones as described here; when a sample is cooled below the Curie temperature, for example, the equilibrium domain configuration simply appears.
Split into simpler sentences: The domain structure of actual magnetic materials does not usually form by the process of large domains splitting into smaller ones as described here. When a sample is cooled below the Curie temperature, for example, the equilibrium domain configuration simply appears.