DOE OSTI · 3520903
Cooperative spin coupling in PrFeO3
Abstract
A transition from crystal-field to spin wave excitations has been experimentally observed in PrFeO3 using inelastic neutron scattering. Theoretical modeling with density functional theory and the mean field random phase approximation successfully reproduces the experimental observations and allows extraction of the values for the various exchange interactions. The study reveals that the strong coupling between the two magnetic sublattices of Pr and Fe is the fundamental mechanism underlying the low-temperature Pr magnetism. This coupling, analogous to the Dicke cooperative interaction between atoms and photons, polarizes the Pr moments, enhances the Pr-Pr interactions, and contributes to the formation of a quasidoublet, leading to the transition from single-particle to collective excitations within the Pr sublattice. Furthermore, this coupling induces spin reorientation on the Fe sublattice. The manipulation of magnetic moments via spin waves is achievable through the coupling between different magnetic sublattices in a bulk material containing multiple magnetic ions.
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Garlea, Vasile [ORNL] (ORCID:0000000253227271), Winn, Barry [ORNL] (ORCID:0000000163834318), Narayanan, Narendirakumar [Australian Centre for Neutron Scattering, Australian Nuclear Science and Technology Organisation], Yu, Dehong [Australian Nuclear Science and Technology Organisation,], Deng, Guochu [ANSTO, Bragg Institute, Australia], Mole, Richard [Australian Nuclear Science and Technology Organisation,], Sun, Dehui [Institute for Advanced Interdisciplinary Research, University of Jinan, Jinan, 250022, China], Hester, James [Australian Centre for Neutron Scattering, Australian Nuclear Science and Technology Organisation], Liu, Yun [Australian National University, Canberra], Mcintyre, Garry [Australian Centre for Neutron Scattering, Australian Nuclear Science and Technology Organisation], Robinson, Robert A [University of Wollongong, Wollongong, NSW, 2500, Australia], Cao, Shixun [Shanghai University, China]. 2026-08-01. Cooperative spin coupling in PrFeO3. https://doi.org/10.1103/vdw3-fzrf
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