Magnetic behavior of the spin-chain compound, Ca3CuRuO6

✍ Scribed by S. Rayaprol; E.V. Sampathkumaran

• Book ID: 103886307
• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 286 KB
• Volume: 378-380
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2006.01.529

✦ Synopsis

A spin-chain compound, Ca 3 CuRuO 6 , forming in a K 4 CdCl 6 -derived monoclinic structure, has been synthesized via solid state route and subjected to magnetization (M) and heat capacity (C) measurements. This compound is found to undergo magnetic ordering (T o ) around 40 K. However, the magnitude of the paramagnetic Curie temperature (y p ) is large (À277 K). Very small ratio of T o =y p suggests the existence of magnetic frustration presumably arising from the triangular arrangement of antiferromagnetically coupled ferromagnetic chains. This frustration however does not lead to spin-glass freezing at low temperatures, as there is no prominent feature in the AC w around 40 K. Considering that the peak in C(T) around 40 K is very weak, we conclude that this material exhibits inhomogeneous magnetism despite being stoichiometric, possibly as a manifestation of some degree of Ca-Cu site-disorder.