Unusually strong electronic correlation and field-induced ordered phase in YbCo2
| العنوان: | Unusually strong electronic correlation and field-induced ordered phase in YbCo2 |
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| المؤلفون: | J Valenta, N Tsujii, H Yamaoka, F Honda, Y Hirose, H Sakurai, N Terada, T Naka, T Nakane, T Koizumi, H Ishii, N Hiraoka, T Mori |
| المصدر: | Journal of Physics: Condensed Matter. 35:285601 |
| بيانات النشر: | IOP Publishing, 2023. |
| سنة النشر: | 2023 |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons, Strongly Correlated Electrons (cond-mat.str-el), FOS: Physical sciences, General Materials Science, Condensed Matter Physics |
| الوصف: | We report the first study of electrical resistivity, magnetization, and specific heat on YbCo2. The measurements on a single-phased sample of YbCo2 bring no evidence of magnetic ordering down to 0.3 K in a zero magnetic field. The manifestations of low Kondo temperature are observed. The specific heat value divided by temperature, C/T, keeps increasing logarithmically beyond 7 J/mol K2 with decreasing temperature down to 0.3 K without no sign of magnetic ordering, suggesting a very large electronic specific heat. Analysis of the magnetic specific heat indicates that the large portion of the low-temperature specific heat is not explained simply by the low Kondo temperature but is due to the strong intersite magnetic correlation in both the 3d and 4f electrons. Temperature-dependent measurements under static magnetic fields up to 7 T are carried out, which show the evolution of field-induced transition above 2 T. The transition temperature increases with increasing field, pointing to a ferromagnetic character. The extrapolation of the transition temperature to zero field suggests that YbCo2 is in the very proximity of the quantum critical point. These results indicate that in the unique case of YbCo2, the itinerant electron magnetism of Co 3d-electrons and the Kondo effect within the vicinity of quantum criticality of Yb 4f-local moments can both play a role. |
| تدمد: | 1361-648X 0953-8984 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb220335f3db6c9a0c17e5f0c0dbdb66 https://doi.org/10.1088/1361-648x/acca5a |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....bb220335f3db6c9a0c17e5f0c0dbdb66 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 1361648X 09538984 |
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