Reference : Magnetostructural coupling in RFeO3 (R = Nd, Tb, Eu and Gd)
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Multidisciplinary, general & others
http://hdl.handle.net/10993/53443
Magnetostructural coupling in RFeO3 (R = Nd, Tb, Eu and Gd)
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Vilarinho, R. [Univ Porto, Fac Ciencias, Dept Fis & Astron, IFIMUP, Rua Campo Alegre S-N, P-4169007 Porto, Portugal.]
Weber, M. C. [Swiss Fed Inst Technol, Dept Mat, Vladimir Prelog Weg 4, CH-8093 Zurich, Switzerland.]
Guennou, Mael mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)]
Miranda, A. C. [Univ Porto, Fac Ciencias, Dept Fis & Astron, IFIMUP, Rua Campo Alegre S-N, P-4169007 Porto, Portugal.]
Dias, C. [Univ Porto, Fac Ciencias, Dept Fis & Astron, IFIMUP, Rua Campo Alegre S-N, P-4169007 Porto, Portugal.]
Tavares, P. [Univ Tras Os Montes & Alto Douro, Ctr Quim, Dept Quim, P-5000801 Vila Real, Portugal.]
Kreisel, Jens mailto [University of Luxembourg > CRC > Department of Physics and Materials Science (DPHYMS)]
Almeida, A. [Univ Porto, Fac Ciencias, Dept Fis & Astron, IFIMUP, Rua Campo Alegre S-N, P-4169007 Porto, Portugal.]
Moreira, J. Agostinho [Univ Porto, Fac Ciencias, Dept Fis & Astron, IFIMUP, Rua Campo Alegre S-N, P-4169007 Porto, Portugal.]
2022
SCIENTIFIC REPORTS
Nature Portfolio
12
1
9697-14
Yes
International
2045-2322
Berlin
[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.
[NORTE-01-0145-FEDER-022096] ; [UID/NAN/50024/2019] ; [PTDC/NAN-MAT/28538/2017] ; [PTDC/NAN-MAT/0098/2020]
http://hdl.handle.net/10993/53443
10.1038/s41598-022-13097-1
We are deeply acknowledged to J. L. Ribeiro for the fruitful discussion regarding the interpretation of the magnetic data, and P. Bouvier suggestions on the analysis of some specific phonons. We acknowledge funding from NORTE-01-0145-FEDER-022096, UID/NAN/50024/2019 and PTDC/NAN-MAT/28538/2017 projects and R.V. to the grant from PTDC/NAN-MAT/0098/2020.

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