Artículos de revistas
Raman and weak ferromagnetism in Eu2CuO4
Registro en:
Physica B-condensed Matter. Elsevier Science Bv, v. 223-24, n. 41730, n. 522, n. 525, 1996.
0921-4526
WOS:A1996UX82200138
10.1016/0921-4526(96)00162-7
Autor
Alvarenga, AD
Rao, D
Sanjurjo, JA
Granado, E
Torriani, I
Rettori, C
Oseroff, S
Sarrao, J
Fisk, Z
Institución
Resumen
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. 223-24 41730 522 525