Chemical chaos inside a solid material does not stop its atoms from performing a perfectly synchronized dance when the temperature changes.
Scientists long believed that extreme chemical disorder would always scramble the organized transitions of a material's structure or magnetism. Compositionally complex oxides prove that these systems can still undergo clean phase transitions despite having a messy internal makeup. The magnetic and structural changes actually lock together and happen at the exact same moment. This overturns the idea that high-entropy materials are too chaotic for precise physical control. Engineers can now design complex alloys that maintain highly predictable properties for use in extreme environments like jet engines.
Coupled phase transitions in crystalline solids with extreme chemical disorder
arXiv · 2605.03444
Structural phase transitions often couple to magnetic and electronic degrees of freedom, enabling emergent phenomena in solids. In high-entropy oxides (HEOs), which typically stabilize in highly symmetric cubic phases, such transitions are considered rare due to the extreme chemical disorder-analogous to the behavior observed in high-entropy alloys. This raises a fundamental question: can the rich physics of coupled phase transitions persist in such disordered systems? Here, we show that targete