Mossbauer studies on MnGaxFe2-xO4

Authors
Mahmoud, MH Hamdeh, HH Ho, JC Abdalla, AM Abdel-Mageed, AI
Citation
Mh. Mahmoud et al., Mossbauer studies on MnGaxFe2-xO4, SOL ST COMM, 120(11), 2001, pp. 451-453
Citations number
7
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SOLID STATE COMMUNICATIONS
ISSN journal
00381098 → ACNP
Volume
120
Issue
11
Year of publication
2001
Pages
451 - 453
Database
ISI
SICI code
0038-1098(2001)120:11<451:MSOM>2.0.ZU;2-R
Abstract
Mossbauer studies on MnGaxFe2-xO4 (x = 0-1.0) have been made. Measurements at low temperatures in magnetic fields enabled us tt determine the rations distribution on tetrahedral (A) and octahedral (B) sites of the spinel stru cture. Gallium ions show a strong preference for A-sites. Meanwhile, the li ne broadening and line shapes of the B-site subspectra suggest that the loc al variation of hyperfine fields at the B-site Fe ions arises from a random substitution of Ga ions in A-sites. Conclusions about the magnetic exchang e interactions are presented. (C) 2001 Elsevier Science Ltd. All rights res erved.