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Investigation of the presence of charge order in magnetite by measurement of the spin wave spectrum
(American Physical Society, 2006)
Inelastic neutron scattering results on magnetite (Fe3O4) show a large splitting in the acoustic spin wave branch, producing a 7 meV gap midway to the Brillouin zone boundary at q=(0,0,1∕2) and ℏω=43 meV. The splitting occurs below the Verwey...
What is the Focus and Emphasis on Calculators in State-Level K-8 Mathematics Curriculum Standards Documents?
(NCSM Journal of Mathematics Education Leadership, 2006)
We conducted our own analysis of official state mathematics curriculum standards documents so that we might understand and describe the extent to which states support use of calculators in elementary and middle school ...