Spin dynamics and light-induced effects in EuZn₂P₂

Physical Review Materials, 10, 016204 (2026)

M. Dutra, G. G. Vasques, P. C. Sabino, J. G. Dias, J. F. Oliveira, M. A. V. Heringer, M. Cabrera-Baez, E. Baggio Saitovitch, A. R. V. Benvenho, M. A. Avila and J. Munevar

This work, with participation of Prof. Michael Cabrera Baez (UFPE), Elisa Baggio Saitovitch (CBPF) and Marcos A. Avila (UFABC), investigates the interplay between light, magnetism, and charge transport in the Zintl-type antiferromagnet EuZn2P2, addressing the largely unexplored regime of light-induced magnetic effects in intermetallic systems. Combining electron spin resonance (ESR) with optical excitation and electrical transport measurements, the study reveals that spin relaxation is governed by anisotropic magnetic interactions and the formation of magnetic polarons. Under visible light, ESR signals exhibit enhanced intensity and linewidth broadening, indicating a light-induced modification of magnetic dynamics. Additionally, a robust photovoltaic response is observed, with competitive responsivity and detectivity. These results provide experimental evidence of a possible photomagnetic effect at room temperature and establish EuZn₂P₂ as a promising platform to explore light–matter coupling in magnetic quantum materials, bridging spin dynamics and optoelectronic functionality.

Correspondence: n.munevar@correounivalle.edu.co