Scientific Achievement
SrCo2P2 undergoes a pressure-induced collapsed-tetragonal (cT) phase transition transition-driven by interlayer pnictogen bonding resulting in a remarkable near room temperature ferromagnetic ordering (TC up to 260 K) in the cT phase.
Significance and Impact
SrCo2P2 uniquely combines near-room-temperature ferromagnetism with a clean, reversible cT phase transition, offering strong potential for magnetic shape memory and spintronic applications. The excellent agreement between experiments and DFT calculations demonstrates the strong quantitative predictive power of band structure calculations in designing tunable magnetic strong correlated compounds.
Research Details
- Electrical transport, magnetization, and synchrotron X-ray diffraction were performed up to 30 GPa.
- DFT calculations precisely reproduce the observed structural and magnetic phase transitions.
- A full pressure–temperature phase diagram was established.
Huyan, S., Schmidt, J., Valadkhani, A., Wang, H., Li, Z., Sapkota, A., Petri, J. L., Slade, T. J., Ribeiro, R. A., Bi, W., Xie, W., Mazin, I. I., Valenti, R., Bud’ko, S. L., & Canfield, P. C. (2025). Near-room-temperature ferromagnetic ordering in the pressure-induced collapsed-tetragonal phase in SrCo₂P₂. Physical Review B, Letter 112, L041102 (2025). https://doi.org/10.1103/vl33-53qm