Local distortions in multiferroic AgCrO2 triangular spin lattice
| authors | Lopes, AML; Oliveira, GNP; Mendonca, TM; Moreira, JA; Almeida, A; Araujo, JP; Amaral, VS; Correia, JG |
| nationality | International |
| journal | PHYSICAL REVIEW B |
| keywords | DELAFOSSITE OXIDES ABO(2); RELAXATION; ORDERS; PAC; FE; AG; CU; CR; ND |
| abstract | In this work an electric-field gradient and magnetic hyperfine field study of the multiferroic AgCrO2 triangular spin lattice is presented. Perturbed angular correlation measurements at different temperatures, revealed the coexistence of two electric-field gradients, i.e., two distinct local environments at temperatures below 100 K. The emerging second local environment appears as a distortion of the Cr surrounding resulting in a local symmetry lowering. This local distortion emerges much above T-N and concomitantly with the onset of short-range magnetic correlations. We claim that, through a magnetoelastic instability, distinct Cr-Cr exchange interaction pathways appear providing a channel for magnetic frustration release. |
| publisher | AMER PHYSICAL SOC |
| issn | 1098-0121 |
| year published | 2011 |
| volume | 84 |
| issue | 1 |
| digital object identifier (doi) | 10.1103/PhysRevB.84.014434 |
| web of science category | Physics, Condensed Matter |
| subject category | Physics |
| unique article identifier | WOS:000293302400009 |
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impact metrics
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| journal impact factor | 3.575 |
| 5 year journal impact factor | 3.511 |
| category normalized journal impact factor percentile | 70.187 |
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