Physics

Magnetic super-structure and active surface role in the onset of magnetic excitons revealed in TbCu₂ nanoparticles

E. M. Jefremovas, M. D. L. F. Rodríguez, et al.

This research, conducted by Elizabeth M. Jefremovas and co-authors, explores the intriguing magnetic structure and excitations of TbCu₂, revealing a persistently helix-like magnetic super-structure in bulk and nanoparticle forms. The study sheds light on the effects of surface broken symmetry on nanoscale quantum energy levels, paving the way for advancements in spintronics and information technology.

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Abstract

This research investigates the magnetic structure and excitations of TbCu₂ in both bulk and 8 nm nanoparticle forms. Using small-angle neutron scattering (SANS), a helix-like magnetic super-structure is identified, persistent in both bulk and nanoparticle samples. Inelastic neutron scattering (INS) reveals the magnetic excitons and crystalline electric field (CEF) energy level schemes, showing how surface broken symmetry affects nanoscale quantum energy levels and interfacial effects on magnetic excitation propagation. The findings offer insights for developing magnetic moment dynamics models based on complex nanometric super-structures and for integrating nanoparticles into spintronics and information technology.

Publisher

Communications Materials

Published On

Aug 04, 2023

Authors

Elizabeth M. Jefremovas, María de la Fuente Rodríguez, Diego Alba Venero, Cristina Echevarría-Bonet, Philipp Bender, Björn Fåk, Jesús A. Blanco, Luis Fernández Barquín

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