## Abstract

The spin-polarized electron momentum distributions in the Cr-based chalcogenide spinels Fe_{1-x}Cu_{x}Cr_{2}S_{4} (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 Fe^{2+} (for x = 0.0) and Fe^{3+} (for x = 0.5) with spin moments of 3.66μ_{B} (for x = 0.0) per formula unit (FU^{-1}) and 1.6μ_{B} FU^{-1} (for x = 0.5), are aligned antiparallel to those of the octahedrally coordinated Cr^{3+} with spin moments of 5.0μ_{B} FU^{-1} (for x = 0.0) and 4.82μ_{B} FU^{-1} (for x = 0.5). In the ferromagnetic system for x = 1.0, the Cr moment is found to be 5.28μ_{B} FU^{-1}.

Original language | English |
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Article number | 100407 |

Pages (from-to) | 1004071-1004074 |

Number of pages | 4 |

Journal | Physical Review B - Condensed Matter and Materials Physics |

Volume | 66 |

Issue number | 10 |

DOIs | |

Publication status | Published - Sep 2002 |