Magnetic behaviour of ludwigites

Authors
Fernandes, JC Guimaraes, RB Mir, M Continentino, MA Borges, HA Cernicchiaro, G Fontes, MB Baggio-Saitovitch, EM
Citation
Jc. Fernandes et al., Magnetic behaviour of ludwigites, PHYSICA B, 281, 2000, pp. 694-695
Citations number
3
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA B
ISSN journal
09214526 → ACNP
Volume
281
Year of publication
2000
Pages
694 - 695
Database
ISI
SICI code
0921-4526(200006)281:<694:MBOL>2.0.ZU;2-8
Abstract
Ludwigites are low-dimensional magnetic systems with chemical formula 2MO . M'BO3. Fur the ludwigites in which M' = Fe and M = Mg, Fe, Ni and Cu we re port the following behavior: (1) The ordering temperatures of the Fe3+ sub- system in each compound is higher than that of the respective M sub-system: (2) In particular, the 2FeO . FeBO3 ludwigite presents a reentrant weak fe rromagnetism in the range 40-70 K and the coexistence of paramagnetic and a ntiferromagnetic spins between 70 and 112 K (C) 2000 Elsevier Science B.V, All rights reserved.