Journal
PHYSICAL REVIEW B
Volume 81, Issue 22, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.81.224302
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Funding
- State of Texas through the Texas Center for Superconductivity at the University of Houston
- NSF MRSEC [DMR-0213985]
- Bulgarian National Fund for Scientific Research [DO 02-167/2008]
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The lattice dynamics of the ferromagnetic spinel CuCr2Se4 (T-C=430 K) was studied experimentally by measuring the Raman spectra and theoretically by calculation of zone center phonon frequencies within a shell model. All Raman allowed modes (A(1g)+E-g+3F(2g)) were identified and assigned to specific atomic motions. The relative intensity of the Raman lines varies strongly with excitation photon energy between 1.58 and 2.71 eV but no significant phonon anomalies are observed near T-C.
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