Soft x-ray magnetic circular dichroism study of the ferromagnetic spinel-type Cr chalcogenides
We have observed magnetic circular dichroism (MCD) in the soft x-ray absorption spectra of the semiconducting ferromagnet CdCr{sub 2}Se{sub 4} and the metallic ferromagnets CuCr{sub 2}S{sub 4} and CuCr{sub 2}Se{sub 4}. The Cr 2p x-ray absorption and MCD spectra show that the d-electron occupancies of the Cr atom in the Cu based Cr sulfide and selenide are not much different from that in the CdCr{sub 2}Se{sub 4} in spite of the different formal valencies Cr{sup 3.5+} and Cr{sup 3+}, respectively. The observed Cu 2p MCD spectra show the existence of small magnetic moments on the Cu sites which are aligned antiparallel to the Cr 3d moment in CuCr{sub 2}S{sub 4} and CuCr{sub 2}Se{sub 4}, consistent with band-structure calculation.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40203531
- Journal Information:
- Physical Review B, Vol. 63, Issue 22; Other Information: DOI: 10.1103/PhysRevB.63.224420; Othernumber: PRBMDO000063000022224420000001; 049114PRB; PBD: 1 Jun 2001; ISSN 0163-1829
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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