Eletron Spin Resonance (ESR) experiments of Fe-doped YbAlB4 heavy fermion compounds
In this work we have performed Electron Spin Resonance (ESR) experiments on single crystals of Fe-doped YbAlB4 heavy fermion compounds. We explored the ESR measurements in X-band (? = 9,4 GHz). For ?-YbAlB4, we have performed X-band experiments for single crystals and we found a remarkable ESR signa...
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| Format: | Online |
| Language: | Portuguese |
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Universidade Estadual de Campinas
2011
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| Online Access: | https://econtents.sbu.unicamp.br/eventos/index.php/phyproceedings/article/view/3288 |
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| author | Holanda , L.M. Pagliuso , P.G. Rettori , C. Nakatsuji , S. Kuga , K. |
| author_facet | Holanda , L.M. Pagliuso , P.G. Rettori , C. Nakatsuji , S. Kuga , K. |
| author_sort | Holanda , L.M. |
| collection | Portal de Eventos Científicos da UNICAMP |
| container_reference | Physicae Proceedings; Vol. 1 No. 1 (2010): Proceedings X EJP ; 1-1 |
| description | In this work we have performed Electron Spin Resonance (ESR) experiments on single crystals of Fe-doped YbAlB4 heavy fermion compounds. We explored the ESR measurements in X-band (? = 9,4 GHz). For ?-YbAlB4, we have performed X-band experiments for single crystals and we found a remarkable ESR signal that behaves as a conduction electron spin resonance (CESR) at high temperatures and acquires characteristics of the Yb(3+) local moment ESR at low temperature. This behavior was not found in the ?-YbAlB4. The striking and unique dual behavior observed in the same ESR spectra of ?-YbAlB4 associated to the ESR results found for ?-YbAlB4 allowed us to propose a qualitative scenario that may explain the origin of the ESR signal in HF systems. We speculate that for HF systems a strongly coupled 4f and c-e give origin to “Kondo coupled ESR modes”, which may behave as CESR or LM ESR, depending on the strength of Jf s . Moreover, HF systems near a QCP may have propitious conditions to present such a signal. |
| first_indexed | 2025-10-08T13:49:25Z |
| format | Online |
| id | ojs-article-3288 |
| institution | Universidade Estadual de Campinas |
| issn | 2236-7535 |
| language | por |
| last_indexed | 2025-10-08T13:49:25Z |
| publishDate | 2011 |
| publisher | Universidade Estadual de Campinas |
| record_format | ojs |
| spelling | ojs-article-32882020-05-15T15:13:20Z Eletron Spin Resonance (ESR) experiments of Fe-doped YbAlB4 heavy fermion compounds Holanda , L.M. Pagliuso , P.G. Rettori , C. Nakatsuji , S. Kuga , K. Electron Spin Resonance Physics In this work we have performed Electron Spin Resonance (ESR) experiments on single crystals of Fe-doped YbAlB4 heavy fermion compounds. We explored the ESR measurements in X-band (? = 9,4 GHz). For ?-YbAlB4, we have performed X-band experiments for single crystals and we found a remarkable ESR signal that behaves as a conduction electron spin resonance (CESR) at high temperatures and acquires characteristics of the Yb(3+) local moment ESR at low temperature. This behavior was not found in the ?-YbAlB4. The striking and unique dual behavior observed in the same ESR spectra of ?-YbAlB4 associated to the ESR results found for ?-YbAlB4 allowed us to propose a qualitative scenario that may explain the origin of the ESR signal in HF systems. We speculate that for HF systems a strongly coupled 4f and c-e give origin to “Kondo coupled ESR modes”, which may behave as CESR or LM ESR, depending on the strength of Jf s . Moreover, HF systems near a QCP may have propitious conditions to present such a signal. Universidade Estadual de Campinas 2011-04-24 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://econtents.sbu.unicamp.br/eventos/index.php/phyproceedings/article/view/3288 Physicae Proceedings; Vol. 1 No. 1 (2010): Proceedings X EJP ; 1-1 Physicae Proceedings; v. 1 n. 1 (2010): Proceedings X EJP ; 1-1 2236-7535 por https://econtents.sbu.unicamp.br/eventos/index.php/phyproceedings/article/view/3288/3215 Copyright (c) 2010 Physicae |
| spellingShingle | Holanda , L.M. Pagliuso , P.G. Rettori , C. Nakatsuji , S. Kuga , K. Electron Spin Resonance Physics Eletron Spin Resonance (ESR) experiments of Fe-doped YbAlB4 heavy fermion compounds |
| title | Eletron Spin Resonance (ESR) experiments of Fe-doped YbAlB4 heavy fermion compounds |
| title_full | Eletron Spin Resonance (ESR) experiments of Fe-doped YbAlB4 heavy fermion compounds |
| title_fullStr | Eletron Spin Resonance (ESR) experiments of Fe-doped YbAlB4 heavy fermion compounds |
| title_full_unstemmed | Eletron Spin Resonance (ESR) experiments of Fe-doped YbAlB4 heavy fermion compounds |
| title_short | Eletron Spin Resonance (ESR) experiments of Fe-doped YbAlB4 heavy fermion compounds |
| title_sort | eletron spin resonance (esr) experiments of fe-doped ybalb4 heavy fermion compounds |
| topic | Electron Spin Resonance Physics |
| url | https://econtents.sbu.unicamp.br/eventos/index.php/phyproceedings/article/view/3288 |
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