Emergence of Strong Exchange Interaction in the Actinide Series: The Driving Force for Magnetic Stabilization of Curium

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Using electron energy-loss spectroscopy in a transmission electron microscope, many-electron atomic spectral calculations and density functional theory, we examine the electronic and magnetic structure of Cm metal. We show that angular momentum coupling in the 5f states plays a decisive role in the formation of the magnetic moment. The 5f states of Cm in intermediate coupling are strongly shifted towards the LS coupling limit due to exchange interaction, unlike most actinide elements where the effective spin-orbit interaction prevails. It is this LS-inclined intermediate coupling that is the key to producing the large spin polarization which in turn dictates the newly ... continued below

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Moore, K; der Laan, G v; Haire, D; Wall, M; Schwartz, A & Soderlind, P January 4, 2007.

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Using electron energy-loss spectroscopy in a transmission electron microscope, many-electron atomic spectral calculations and density functional theory, we examine the electronic and magnetic structure of Cm metal. We show that angular momentum coupling in the 5f states plays a decisive role in the formation of the magnetic moment. The 5f states of Cm in intermediate coupling are strongly shifted towards the LS coupling limit due to exchange interaction, unlike most actinide elements where the effective spin-orbit interaction prevails. It is this LS-inclined intermediate coupling that is the key to producing the large spin polarization which in turn dictates the newly found crystal structure of Cm under pressure.

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PDF-file: 15 pages; size: 0.6 Mbytes

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  • Journal Name: Physical Review Letters, vol. 98, N/A, June 5, 2007, pp. 236402; Journal Volume: 98

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  • Report No.: UCRL-JRNL-227093
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 936991
  • Archival Resource Key: ark:/67531/metadc893284

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  • January 4, 2007

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  • Sept. 27, 2016, 1:39 a.m.

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  • Nov. 23, 2016, 6:16 p.m.

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Moore, K; der Laan, G v; Haire, D; Wall, M; Schwartz, A & Soderlind, P. Emergence of Strong Exchange Interaction in the Actinide Series: The Driving Force for Magnetic Stabilization of Curium, article, January 4, 2007; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc893284/: accessed September 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.