Magnetostructural coupling in RFeO3 (R = Nd, Tb, Eu and Gd)

• Type: Article in International Scientific Journal
• Date: 2022

Authors

Vilarinho, R (Author) Other; Weber, MC (Author) Other; Guennou, M (Author) Other; Miranda, AC (Author) Other; Dias, C (Author) FCUP; Tavares, P (Author) Other; Kreisel, J (Author) Other; Almeida, A (Author) FCUP; Agostinho Moreira, JA (Author) FCUP

Journal

Title: Scientific Reports

Vol. 12

ISSN: 2045-2322

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 9 Citations

Scopus - 8 Citations

Other information

Authenticus ID: P-00W-PTQ

DOI: 10.1038/s41598-022-13097-1

Abstract (EN): We investigate the interplay of magnetization and lattice vibrations in rare-earth orthoferrites RFeO3, with a specific focus on non-symmetry-breaking anomalies. To do so, we study the magnetization, magnon excitations and lattice dynamics as a function of temperature in NdFeO3, TbFeO3, EuFeO3 and GdFeO3. The magnetization shows distinct temperature anomalous behavior for all investigated rare-earth orthoferrites, even in the compounds with no phase transitions occurring at those temperatures. Through spin-phonon coupling, these magnetic changes are mirrored by the FeO6 rotation mode for all the studied RFeO3, revealing a common magnetostructural effect associated with the octahedra rotations. The R3+ oscillation modes evidence a Fe3+/R3+ spins cross-talk for the NdFeO3 and TbFeO3 cases. Our work sheds light into the common magnetostructural coupling in rare-earth orthoferrites, and the important role of magnetic anisotropy and spin-orbit coupling strength of the R-Fe interactions on the spin-reorientation transition at high temperatures.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 14