Orbital moment anisotropy in ultrathin FePt layers
| Autor: | Márcio M. Soares, Aline Y. Ramos, A. D. Lamirand, Hélio C. N. Tolentino, Maurizio De Santis |
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| Přispěvatelé: | Surfaces, Interfaces et Nanostructures (SIN), Institut Néel (NEEL), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), Matériaux, Rayonnements, Structure (MRS), CRG et Grands Instruments (CRG) |
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Materials science
Condensed matter physics Magnetic circular dichroism Order (ring theory) Condensed Matter Physics Magnetocrystalline anisotropy Epitaxy Electronic Optical and Magnetic Materials Moment (mathematics) Hysteresis Magnetic anisotropy Condensed Matter::Materials Science [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] Anisotropy |
| Zdroj: | Physical Review B: Condensed Matter and Materials Physics (1998-2015) Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2014, 90 (21), pp.214403. ⟨10.1103/PhysRevB.90.214403⟩ |
| ISSN: | 1098-0121 1550-235X |
| DOI: | 10.1103/PhysRevB.90.214403⟩ |
| Popis: | The anisotropy of the Fe orbital moment is investigated in epitaxial ultrathin ($l2\phantom{\rule{0.28em}{0ex}}\mathrm{nm}$) FePt layers by angular dependent x-ray magnetic circular dichroism (XMCD) for two distinct epitaxial systems, CoO/FePt/Pt(001) and Pt/FePt/MnPt/Pt(001). Element selective hysteresis loops obtained from the XMCD signal at the Fe ${L}_{3}$ edge are used to quantify the anisotropy constants, which are consistent with the corresponding chemical order parameter. A careful procedure for XMCD sum rules data analysis is set up to avoid experimental overestimation of the orbital moment. The measured orbital moment of Fe is found comparable to theoretical values and shows a significant anisotropy. This orbital moment anisotropy is discussed in the light of the current theoretical understanding of magnetocrystalline anisotropy in ordered alloys. |
| Databáze: | OpenAIRE |
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