Some structure and magnetic effects of Ga incorporation on alpha-FeOOH

Authors
dos Santos, CA Horbe, AMC Barcellos, CMO da Cunha, JBM
Citation
Ca. Dos Santos et al., Some structure and magnetic effects of Ga incorporation on alpha-FeOOH, SOL ST COMM, 118(9), 2001, pp. 449-452
Citations number
15
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SOLID STATE COMMUNICATIONS
ISSN journal
00381098 → ACNP
Volume
118
Issue
9
Year of publication
2001
Pages
449 - 452
Database
ISI
SICI code
0038-1098(2001)118:9<449:SSAMEO>2.0.ZU;2-M
Abstract
The effects of Ga incorporation on goethite were investigated by using X-ra y diffractometry (XRD), particle-induced X-ray emission (PIXE), susceptibil ity measurements and Mossbauer spectroscopy (MS). Samples GaxFe1-xOOH were prepared with x = 0.00, 0.01, 0.03, 0.05, 0.10, 0.35 and 0.70. All the samp les are single-phase and an accurate observation of the structure refinemen t procedure makes clear the sample-dependent structural behaviour. A model is proposed in which the main effect of Ga incorporation is to reduce the c rystallite dimensions. (C) 2001 Elsevier Science Ltd. All rights reserved.