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Modi MH, Gupta RK, Sinha M, Yadav PK. Influence of spin orbit splitting and satellite transitions on nickel soft X-ray optical properties near its L 2,3 absorption edge region. JOURNAL OF SYNCHROTRON RADIATION 2020; 27:1633-1639. [PMID: 33147189 DOI: 10.1107/s1600577520011960] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 08/31/2020] [Indexed: 06/11/2023]
Abstract
Transition elements exhibit strong correlations and configuration interactions between core and valence excited states, which give rise to different excitations inside materials. Nickel exhibits satellite features in its emission and absorption spectra. Effects of such transitions on the optical constants of nickel have not been reported earlier and the available database of Henke et al. does not represent such fine features. In this study, the optical behaviour of ion beam sputter deposited Ni thin film near the L2,3-edge region is investigated using reflection spectroscopy techniques, and distinct signatures of various transitions are observed. The soft X-ray reflectivity measurements in the 500-1500 eV photon energy region are performed using the soft X-ray reflectivity beamline at the Indus-2 synchrotron radiation source. Kramers-Kronig analysis of the measured reflectivity data exhibit features corresponding to spin orbital splitting and satellite transitions in the real and imaginary part of the refractive index (refraction and absorption spectra). Details of fine features observed in the optical spectra are discussed. To the best of our knowledge, this is the first study reporting fine features in the measured optical spectra of Ni near its L2,3-edge region.
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Affiliation(s)
- Mohammed H Modi
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai, Maharashtra 400094, India
| | - Raj Kumar Gupta
- Soft X-ray Applications Laboratory, Raja Ramanna Centre for Advanced Technology, Indore, Madhya Pradesh 452013, India
| | - Mangalika Sinha
- Soft X-ray Applications Laboratory, Raja Ramanna Centre for Advanced Technology, Indore, Madhya Pradesh 452013, India
| | - Praveen Kumar Yadav
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai, Maharashtra 400094, India
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Borgna A, Anderson BG, Saib AM, Bluhm H, Hävecker M, Knop-Gericke A, Kuiper AET(T, Tamminga Y, Niemantsverdriet JW(H. Pt−Co/SiO2 Bimetallic Planar Model Catalysts for Selective Hydrogenation of Crotonaldehyde. J Phys Chem B 2004. [DOI: 10.1021/jp040286k] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Armando Borgna
- Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin, Germany, and Philips Research Laboratories, 5656 AA, Eindhoven, The Netherlands
| | - Bruce G. Anderson
- Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin, Germany, and Philips Research Laboratories, 5656 AA, Eindhoven, The Netherlands
| | - Abdool M. Saib
- Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin, Germany, and Philips Research Laboratories, 5656 AA, Eindhoven, The Netherlands
| | - Hendrik Bluhm
- Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin, Germany, and Philips Research Laboratories, 5656 AA, Eindhoven, The Netherlands
| | - Michael Hävecker
- Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin, Germany, and Philips Research Laboratories, 5656 AA, Eindhoven, The Netherlands
| | - Axel Knop-Gericke
- Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin, Germany, and Philips Research Laboratories, 5656 AA, Eindhoven, The Netherlands
| | - A. E. T. (Ton) Kuiper
- Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin, Germany, and Philips Research Laboratories, 5656 AA, Eindhoven, The Netherlands
| | - Yde Tamminga
- Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin, Germany, and Philips Research Laboratories, 5656 AA, Eindhoven, The Netherlands
| | - J. W. (Hans) Niemantsverdriet
- Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin, Germany, and Philips Research Laboratories, 5656 AA, Eindhoven, The Netherlands
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Föhlisch A, Karis O, Weinelt M, Hasselström J, Nilsson A, Mårtensson N. Auger resonant Raman scattering in itinerant electron systems: continuum excitation in Cu. PHYSICAL REVIEW LETTERS 2002; 88:027601. [PMID: 11801036 DOI: 10.1103/physrevlett.88.027601] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2000] [Indexed: 05/23/2023]
Abstract
The role of electron localization for resonant photoemission and Auger resonant Raman scattering to occur in an extended system was studied by polarization dependent resonant photoemission at the Cu L edges. Auger resonant Raman scattering was observed for continuum excitation into van Hove singularities at the L(1) and X(1) points, 4.2 and 7.7 eV above threshold. These findings show that resonant photoemission and Auger resonant Raman scattering are general features of photoemission independent of the degree of electron localization.
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Affiliation(s)
- A Föhlisch
- Department of Physics, Uppsala University, Box 530, S-751 21 Uppsala, Sweden.
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Chen CT, Idzerda YU, Lin H, Smith NV, Meigs G, Chaban E, Ho GH, Pellegrin E, Sette F. Experimental confirmation of the X-ray magnetic circular dichroism sum rules for iron and cobalt. PHYSICAL REVIEW LETTERS 1995; 75:152-155. [PMID: 10059138 DOI: 10.1103/physrevlett.75.152] [Citation(s) in RCA: 333] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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