Universal phase diagram of Si-, Zn-, Mg- and Ni-doped CuGeO3: spin-Peierlsorder and antiferromagnetism

Authors
Grenier, B Renard, JP Veillet, P Regnault, LP Lorenzo, JE Paulsen, C Dhalenne, G Revcolevschi, A
Citation
B. Grenier et al., Universal phase diagram of Si-, Zn-, Mg- and Ni-doped CuGeO3: spin-Peierlsorder and antiferromagnetism, PHYSICA B, 261, 1999, pp. 954-955
Citations number
9
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA B
ISSN journal
09214526 → ACNP
Volume
261
Year of publication
1999
Pages
954 - 955
Database
ISI
SICI code
0921-4526(199901)261:<954:UPDOSZ>2.0.ZU;2-D
Abstract
We have performed magnetic susceptibility measurements on CuGe1-xSixO3 and Cu1-yMyGeO3 (with M = Zn, Mg, Ni) single crystals for a large number of con centrations. This study allowed us to determine an universal (T(x, y)) phas e diagram with a sealing factor y approximate to 3x. We have also studied t he coexistence of the AF and SP phases in Si-doped CuGeO3 compounds by neut ron diffraction: As the silicon concentration increases, the long-range ord ered antiferromagnetic phase over takes the spin-Peierls order, which becom es short-range ordered. (C) 1999 Elsevier Science B.V. All rights reserved.