Absence of moment fragmentation in the mixed B -site pyrochlore Nd2GaSbO7
| Autor: | Alannah Hallas, Stuart Calder, Matthew B. Stone, Christopher R. Wiebe, Paul Sarte, B. A. Gonzalez, Stephen D. Wilson, Adam A. Aczel, M. Zelensky, Edward J. Pace, Yixi Su, Manh Duc Le, S. J. Gomez, Chris Stock, J. P. Attfield, Ka H. Hong, Erxi Feng |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Physical Review B. 103 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.103.214419 |
| Popis: | Nd-based pyrochlore oxides have garnered significant interest owing to the moment-fragmentation physics observed in Nd${}_{2}$Zr${}_{2}$O${}_{7}$ and speculated in Nd${}_{2}$Hf${}_{2}$O${}_{7}$. Notably, this phenomenon is absent in Nd${}_{2}$Sn${}_{2}$O${}_{7}$, which features a smaller $B$-site ionic radius. Here, bulk characterization and neutron scattering measurements reveal a similar absence of moment fragmentation in Nd${}_{2}$GaSbO${}_{7}$, which is characterized by significant $B$-site disorder and an extremely small average ionic radius on the $B$ site. These results may indicate that chemical pressure (and not necessarily the $B$-site disorder) plays a key role in the presence or absence of this exotic phenomenon. |
| Databáze: | OpenAIRE |
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