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Type: Artigo de periódico
Title: Raman-scattering and weak-ferromagnetism studies in Eu2CuO4
Author: Alvarenga, AD
Rao, D
Sanjurjo, JA
Granado, E
Torriani, I
Rettori, C
Oseroff, S
Sarrao, J
Fisk, Z
Abstract: We show that there is a subtle instability of the T' structure for the R(2)CuO(4) (R = rare earth) compounds at the center of the R series with the boundary at Eu2CuO4. Crystals grown in Pt crucibles and PbQ flux show weak ferromagnetism (WF) and two strongly temperature-dependent forbidden Raman peaks. However crystals grown in alumina crucibles and CuO flux do not show WF and the forbidden Raman peaks are much less intense. The observation of WF and forbidden Raman peaks for Eu2CuO4 compounds suggests that the instability of the T' structure may be associated with O(1) displacement in the CuO2 planes.
Country: EUA
Editor: American Physical Soc
Rights: aberto
Identifier DOI: 10.1103/PhysRevB.53.837
Date Issue: 1996
Appears in Collections:Unicamp - Artigos e Outros Documentos

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