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The formation, structure and physical properties of M(2)Pd(14+x)B(5-y) compounds, with M =  La, Ce, Pr, Nd, Sm, Eu, Gd, Lu and Th.
MedLine Citation:
PMID:  21828549     Owner:  NLM     Status:  In-Data-Review    
Novel ternary compounds, M(2)Pd(14+x)B(5-y) (M =  La, Ce, Pr, Nd, Sm, Eu, Gd, Lu, Th; x∼0.9, y∼0.1), have been synthesized by arc melting. The crystal structures of Nd(2)Pd(14+x)B(5-y) and Th(2)Pd(14+x)B(5-y) were determined from x-ray single-crystal data and both are closely related to the structure type of Sc(4)Ni(29)B(10). All compounds were characterized by Rietveld analyses and found to be isotypic with the Nd(2)Pd(14+x)B(5-y) type. Measurements of the temperature dependent susceptibility and specific heat as well as the temperature and field dependent resistivity were employed to derive basic information on bulk properties of these compounds. The electrical resistivity of M(2)Pd(14+x)B(5-y), in general, is characterized by small RRR (residual resistance ratio) values originating from defects inherent to the crystal structure. Whereas the compounds based on Ce, Nd, Sm and Gd exhibit magnetic order, those based on Pr and Eu seem to be non-magnetic, at least down to 400 mK. While the non-magnetic ground state of the Pr based compound is a consequence of crystalline electric field effects in the context of the non-Kramers ion Pr, the lack of magnetic order in the case of the Eu based compound results from an intermediate valence state of the Eu ion.
E Royanian; E Bauer; H Kaldarar; A Galatanu; R T Khan; G Hilscher; H Michor; M Reissner; P Rogl; O Sologub; G Giester; A P Gonçalves
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Publication Detail:
Type:  Journal Article     Date:  2009-07-06
Journal Detail:
Title:  Journal of physics. Condensed matter : an Institute of Physics journal     Volume:  21     ISSN:  0953-8984     ISO Abbreviation:  J Phys Condens Matter     Publication Date:  2009 Jul 
Date Detail:
Created Date:  2011-08-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101165248     Medline TA:  J Phys Condens Matter     Country:  England    
Other Details:
Languages:  eng     Pagination:  305401     Citation Subset:  -    
Institute of Solid State Physics, Vienna University of Technology, A-1040 Wien, Austria. Institute of Physical Chemistry, University of Vienna, A-1090 Wien, Austria.
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