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Type: Artigo de periódico
Title: Raman and weak ferromagnetism 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 R = Eu. Crystals grown in Pt crucibles and PbO flux show weak ferromagnetism (WF) and two temperature-dependent forbidden Raman peaks. Crystals grown in alumina crucibles and CuO flux do not show WF and the forbidden Raman peaks are much weaker. The WF and forbidden Raman peaks in Eu(2)CuO(4) suggests that the instability of the T' structure is associated with O(1) displacement in the CuO(2) planes.
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/0921-4526(96)00162-7
Date Issue: 1996
Appears in Collections:Unicamp - Artigos e Outros Documentos

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