Orbital Moment Determination in (MnxFe1-x)3O4 Nanoparticles

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Nanoparticles of (Mn{sub x}Fe{sub 1-x}){sub 3}O{sub 4} with a concentration ranging from x = 0 to 1 and a crystallite size of 14-15 nm were measured using X-ray absorption spectroscopy and X-ray magnetic circular dichroism to determine the ratio of the orbital moment to the spin moment for Mn and Fe. At low Mn concentrations, the Mn substitutes into the host Fe{sub 3}O{sub 4} spinel structure as Mn{sup 2+} in the tetrahedral A-site. The net Fe moment, as identified by the X-ray dichroism intensity, is found to increase at the lowest Mn concentrations then rapidly decrease until no dichroism is ... continued below

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Pool, V. L.; Jolley, C.; Douglas, T.; Arenholz, E. & Idzerda, Y. U. October 22, 2010.

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Nanoparticles of (Mn{sub x}Fe{sub 1-x}){sub 3}O{sub 4} with a concentration ranging from x = 0 to 1 and a crystallite size of 14-15 nm were measured using X-ray absorption spectroscopy and X-ray magnetic circular dichroism to determine the ratio of the orbital moment to the spin moment for Mn and Fe. At low Mn concentrations, the Mn substitutes into the host Fe{sub 3}O{sub 4} spinel structure as Mn{sup 2+} in the tetrahedral A-site. The net Fe moment, as identified by the X-ray dichroism intensity, is found to increase at the lowest Mn concentrations then rapidly decrease until no dichroism is observed at 20% Mn. The average Fe orbit/spin moment ratio is determined to initially be negative and small for pure Fe{sub 3}O{sub 4} nanoparticles and quickly go to 0 by 5%-10% Mn addition. The average Mn moment is anti-aligned to the Fe moment with an orbit/spin moment ratio of 0.12 which gradually decreases with Mn concentration.

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  • Journal Name: Journal of Applied Physics; Journal Volume: 109; Journal Issue: 7

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  • Report No.: LBNL-4576E
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 1016572
  • Archival Resource Key: ark:/67531/metadc831010

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  • October 22, 2010

Added to The UNT Digital Library

  • May 19, 2016, 3:16 p.m.

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  • July 28, 2016, 2:17 p.m.

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Pool, V. L.; Jolley, C.; Douglas, T.; Arenholz, E. & Idzerda, Y. U. Orbital Moment Determination in (MnxFe1-x)3O4 Nanoparticles, article, October 22, 2010; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc831010/: accessed December 13, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.