Conventional refrigerants contribute to global warming, necessitating the search for sustainable alternatives. Researchers from TU Darmstadt have made significant advancements in magnetic cooling technology, which leverages the property of specific compounds that heat up in a magnetic field and cool down once the field is removed, providing an eco-friendly solution. This international team addressed a critical issue in the magnetic cooling field: while high-performance materials often degraded quickly after a few cycles, those that maintained stability lacked sufficient cooling capabilities. By modifying the compound consisting of gadolinium and germanium, the researchers have created a more durable and efficient material that enhances the viability of magnetic refrigeration options.