Collective magnetic state induced by charge disorder in the non-Kramers rare-earth pyrochlore Tb$_{2}$ScNbO$_{7}$
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arXiv
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| Autori principali: | , , , , , , , , , , , , , , , , , |
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| Natura: | Preprint |
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2023
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| author | Alexanian, Y. Lhotel, E. Ballou, R. Colin, C. V. Klein, H. Priol, A. Le Museur, F. Robert, J. Pachoud, E. Lejay, P. Hadj-Azzem, A. Fåk, B. Berrod, Q. Zanotti, J. -M. Suard, E. Dejoie, C. de Brion, S. Simonet, V. |
| author_facet | Alexanian, Y. Lhotel, E. Ballou, R. Colin, C. V. Klein, H. Priol, A. Le Museur, F. Robert, J. Pachoud, E. Lejay, P. Hadj-Azzem, A. Fåk, B. Berrod, Q. Zanotti, J. -M. Suard, E. Dejoie, C. de Brion, S. Simonet, V. |
| contents | Geometrical frustration, as in pyrochlore lattices made of corner-sharing tetrahedra, precludes the onset of conventional magnetic ordering, enabling the stabilization of fluctuating spin states at low temperature. Disorder is a subtle ingredient that can modify the nature of these exotic non-ordered phases. Here, we study the interplay between disorder and magnetic frustration in the new pyrochlore Tb$_{2}$ScNbO$_{7}$ where the non magnetic site presents a charge disorder Nb$^{5+}$/Sc$^{3+}$. Its quantification with sophisticated diffraction techniques (electrons, X-rays, neutrons) allows us to estimate the distribution of the splitting of the magnetic Tb$^{3+}$ non-Kramers ground state doublets and to compare it with excitations measured in inelastic neutron scattering. Combining macroscopic and neutron scattering measurements, we show that a clear spin glass transition at 1 K stems out while retaining strong spin liquid correlations. Our results suggest that Tb$_{2}$ScNbO$_{7}$ stabilizes one of the novel disorder induced quantum spin liquid or topological glassy phases recently proposed theoretically. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2303_05483 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Collective magnetic state induced by charge disorder in the non-Kramers rare-earth pyrochlore Tb$_{2}$ScNbO$_{7}$ Alexanian, Y. Lhotel, E. Ballou, R. Colin, C. V. Klein, H. Priol, A. Le Museur, F. Robert, J. Pachoud, E. Lejay, P. Hadj-Azzem, A. Fåk, B. Berrod, Q. Zanotti, J. -M. Suard, E. Dejoie, C. de Brion, S. Simonet, V. Strongly Correlated Electrons Materials Science Geometrical frustration, as in pyrochlore lattices made of corner-sharing tetrahedra, precludes the onset of conventional magnetic ordering, enabling the stabilization of fluctuating spin states at low temperature. Disorder is a subtle ingredient that can modify the nature of these exotic non-ordered phases. Here, we study the interplay between disorder and magnetic frustration in the new pyrochlore Tb$_{2}$ScNbO$_{7}$ where the non magnetic site presents a charge disorder Nb$^{5+}$/Sc$^{3+}$. Its quantification with sophisticated diffraction techniques (electrons, X-rays, neutrons) allows us to estimate the distribution of the splitting of the magnetic Tb$^{3+}$ non-Kramers ground state doublets and to compare it with excitations measured in inelastic neutron scattering. Combining macroscopic and neutron scattering measurements, we show that a clear spin glass transition at 1 K stems out while retaining strong spin liquid correlations. Our results suggest that Tb$_{2}$ScNbO$_{7}$ stabilizes one of the novel disorder induced quantum spin liquid or topological glassy phases recently proposed theoretically. |
| title | Collective magnetic state induced by charge disorder in the non-Kramers rare-earth pyrochlore Tb$_{2}$ScNbO$_{7}$ |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2303.05483 |