Magnetic Compton scattering study of colossal magnetoresistance materials Fe1-xCuxCr2S4

Aniruddha Deb, N. Hiraoka, M. Itou, Y. Sakurai, H. M. Palmer, C. Greaves

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The spin-polarized electron momentum distributions in the Cr-based chalcogenide spinels Fe1-xCuxCr2S4 (x = 0.0,0.5,1.0) have been measured using a magnetic Compton scattering technique at T = 10 K. The experimental magnetic Compton profiles have been compared with the results from electronic structure calculations performed using the full potential linearized augmented plane-wave method. The theoretical analysis includes a decomposition of the various orbital and atomic contributions. For x = 0.0 and 0.5 sample compositions, the results show that the magnetic moments of the tetrahedrally coordinated Fe2+ (for x = 0.0) and Fe3+ (for x = 0.5) with spin moments of 3.66μB (for x = 0.0) per formula unit (FU-1) and 1.6μB FU-1 (for x = 0.5), are aligned antiparallel to those of the octahedrally coordinated Cr3+ with spin moments of 5.0μB FU-1 (for x = 0.0) and 4.82μB FU-1 (for x = 0.5). In the ferromagnetic system for x = 1.0, the Cr moment is found to be 5.28μB FU-1.

Original languageEnglish
Article number100407
Pages (from-to)1004071-1004074
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number10
Publication statusPublished - Sep 2002

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