| Full text | |
| Author(s): Show less - |
Christovam, D. S.
;
Freitas, G. S.
;
Piva, M. M.
;
Souza, J. C.
;
Malcolms, M. O.
;
Canton, O. L.
;
Leao, J. B.
;
Ratcliff, W.
;
Lynn, J. W.
;
Adriano, C.
;
Pagliuso, P. G.
Total Authors: 11
|
| Document type: | Journal article |
| Source: | PHYSICAL REVIEW B; v. 102, n. 19, p. 9-pg., 2020-11-20. |
| Abstract | |
We report the evolution of the magnetic properties of Ce2Rh1-xIrxIn8-yCdy single crystals. In particular, for Ce2Rh0.5Ir0.5In8 (T-N = 2.0 K) and Ce2Rh0.5Ir0.5In7.79Cd0.21(T-N = 4.2 K), we have solved the magnetic structure of these compounds using single-crystal neutron magnetic diffraction experiments. Taking the magnetic structure of the Ce2RhIn8 heavy-fermion antiferromagnet as a reference, we have identified no changes in the q =(1/2, 1/2, 0) magnetic wave vector; however, the direction of the ordered Ce3+ moments rotates toward the ab plane, under the influence of both dopants. By constraining the analysis of the crystalline electric field (CEF) with the experimental ordered moment's direction and high-temperature magnetic-susceptibility data, we have used a mean-field model with tetragonal CEF and exchange interactions to gain insight into the CEF scheme and anisotropy of the CEF ground-state wave function when Cd and Jr are introduced into Ce2RhIn8. Consistent with previous work, we find that Cd doping in Ce2RhIn8 tends to rotate the magnetic moment toward the ab plane and lower the energy of the CEF excited states' levels. Interestingly, the presence of Jr also rotates the magnetic moment towards the ab plane although its connection to the CEF overall splitting evolution for the y = 0 samples may not be straightforward. These findings may shed light on the origin of the disordered spin-glass phase on the Jr-rich side of the phase diagram and also indicate that the Ce2MIn8 compounds may not follow exactly the same Rh-Ir CEF effects trend established for the CeMIn5 compounds. (AU) | |
| FAPESP's process: | 18/26512-1 - Biological dynamics on networks |
| Grantee: | Otavio Luiz Canton |
| Support Opportunities: | Scholarships in Brazil - Master |
| FAPESP's process: | 06/60440-0 - Study of strongly correlated systems in extreme conditions |
| Grantee: | Carlos Rettori |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 17/10581-1 - Emergent phenomena in reduced dimension systems |
| Grantee: | Pascoal Jose Giglio Pagliuso |
| Support Opportunities: | Special Projects |
| FAPESP's process: | 09/09247-3 - Investigation of pressure induced ordered states in novel complex materials. |
| Grantee: | Cris Adriano |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 18/11364-7 - Magnetic properties of complex systems with non-trivial topology |
| Grantee: | Jean Carlo Souza |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 19/26247-9 - Emergent phenomena in Bi-based systems with low dimensionality |
| Grantee: | Gabriel Silva Freitas |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 15/15665-3 - Studies of orbital differentiation effects in the magnetic and superconducting properties of FeAs based compounds |
| Grantee: | Mário Moda Piva |
| Support Opportunities: | Scholarships in Brazil - Doctorate (Direct) |
| FAPESP's process: | 19/04196-3 - Investigation of crystalline electric field effects in magnetic and superconducting states in the Ce2RhIn8-xCdx compounds |
| Grantee: | Denise Sacramento Christovam |
| Support Opportunities: | Scholarships in Brazil - Master |