IPA: /ˌθɜːrmoʊməˈɡnɛtɪk/
KK: /θɜrmoʊməˈɡnɛtɪk/
Relating to effects that happen when a material is in both a temperature difference and a magnetic field.
The thermomagnetic properties of the material were studied to improve its efficiency in energy applications.
Thermomagnetic is formed from "thermo-" (from Greek "thermos", meaning heat) and "magnetic" (from Greek "magnetis", meaning of Magnesia, a region known for its magnetic properties). The word describes phenomena related to heat and magnetism.
Think of 'heat' ('thermo-') and 'magnetism' ('magnetic') coming together to describe how heat affects magnetic properties.