English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/53087
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Title

Magnetic phase transitions in RIrGe2(R = Tb,Ho) compounds

AuthorsBaran, S.; Puente-Orench, I.; Rodríguez-Velamazán, J. A.
Issue Date2010
PublisherElsevier
CitationJournal of Magnetism and Magnetic Materials 322(4): 405-412 (2010)
AbstractThe magnetic phase transitions of the ternary compounds TbIrGe2 and HoIrGe2 have been studied by magnetic, specific heat and neutron diffraction measurements. Both compounds crystallize in the orthorhombic YIrGe2 -type structure (space group Immm) in which the rare earth atoms occupy two non-equivalent crystallographic sites. The rare earth magnetic moments at different crystallographic sites order independently with two different types of magnetic ordering. The Tb and Ho moments at 4 i site form a collinear commensurate antiferromagnetic structure (Tb moments lie in bc -plane while those of Ho in ab -plane). The magnetic moments at 4 h site also form a collinear antiferromagnetic structure at low temperature but the orientation of magnetic moments is different: Tb moments are aligned along the c-axis while Ho moments lie in ac -plane (in case of TbIrGe2 the magnetic unit cell is four times larger than the crystallographic one). In TbIrGe2 the magnetic order of moments at 4h site at Tt ¼ 9 K turns into a sine modulated one with k =[0:45; 0; 0]. The Néel temperatures for the different sublattices are: for 4h site (Tb) and 5 K (Ho) and for 4 i site: 10 K (Tb) and 2.3 K (Ho). The above results suggest that interactions between the moments at 4 h site are stronger than those for 4 i site. Each sublattice has an uniaxial antiferromagnetic moment arrangement but different reorientation processes and different ordering temperatures reflect the presence of two distinct order parameters. © 2009 Elsevier B.V. All rights reserved.
URIhttp://hdl.handle.net/10261/53087
DOI10.1016/j.jmmm.2009.09.065
Identifiersdoi: 10.1016/j.jmmm.2009.09.065
issn: 0304-8853
Appears in Collections:(ICMA) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.