Microscopic Magnetic Properties of the Itinerant Metamagnet UCoAl by X-ray Magnetic Circular Dichroism
| Autor: | Jean-Pascal Brison, Dai Aoki, Andrei Rogalev, Fabrice Wilhelm, Alexandre Pourret, Jean Pierre Sanchez, Tristan Combier, Alexandra Palacio-Morales |
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| Přispěvatelé: | Service de Physique Statistique, Magnétisme et Supraconductivité (SPSMS - UMR 9001), Institut Nanosciences et Cryogénie (INAC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Instrumentation, Material and Correlated Electrons Physics (IMAPEC), PHotonique, ELectronique et Ingénierie QuantiqueS (PHELIQS), Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), European Synchrotron Radiation Facility (ESRF), Institute for Materials Research, Tohoku University, Institute for Materials Research, KAKENHI Grant Number 25247055, ICC-IMR, REIMEI, ANR-09-BLAN-0146,SINUS(2009), European Project: 258239,EC:FP7:ERC,ERC-2010-StG_20091028,NEWHEAVYFERMION(2010), Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Physics
[PHYS]Physics [physics] Condensed matter physics Magnetism Magnetic circular dichroism General Physics and Astronomy Fermi surface 01 natural sciences 010305 fluids & plasmas Condensed Matter::Materials Science Magnetization Ferromagnetism X-ray magnetic circular dichroism 0103 physical sciences Moment (physics) Condensed Matter::Strongly Correlated Electrons [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat] [PHYS.COND.CM-SCE]Physics [physics]/Condensed Matter [cond-mat]/Strongly Correlated Electrons [cond-mat.str-el] 010306 general physics Spin (physics) ComputingMilieux_MISCELLANEOUS |
| Zdroj: | Journal of the Physical Society of Japan Journal of the Physical Society of Japan, 2017, 86 (2), pp.024712. ⟨10.7566/JPSJ.86.024712⟩ Journal of the Physical Society of Japan, Physical Society of Japan 日本物理学会, 2017, 86 (2), pp.024712. ⟨10.7566/JPSJ.86.024712⟩ |
| ISSN: | 0031-9015 |
| DOI: | 10.7566/JPSJ.86.024712⟩ |
| Popis: | The itinerant metamagnet UCoAl has been investigated by high field X-ray magnetic circular dichroism (XMCD) at the U M4,5 and Co K edges. The orbital and spin moments of U at 2.1 K for H || c applied below and above the first order metamagnetic transition field (HM) have been determined. The magnetism of UCoAl is dominated by the U moment. There is no evidence for any change of the orbital to spin moment ratio (∼−2.05) across HM and within the ferromagnetic phase up to 17 T. The possibility of a Fermi surface reconstruction at HM remains an open option. XMCD at the Co K-edge reveals the presence of a small Co 4p-orbital moment parallel to the macroscopic magnetization. In addition, the Co 3d-moment is estimated to be at most 0.1 μB at 17 T. The similar field dependence of the U and Co magnetizations indicates that the Co moment is induced by the U moment. |
| Databáze: | OpenAIRE |
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