Kondo and magnetic ordering anomalies in Ce2-xPtSi3 (R=La, Y)

Sengupta, Kausik ; Paulose, P. L. ; Sampathkumaran, E. V. (2006) Kondo and magnetic ordering anomalies in Ce2-xPtSi3 (R=La, Y) Physica B: Condensed Matter, 378-380 . pp. 843-844. ISSN 0921-4526

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/j.physb.2006.01.310

Abstract

The compound Ce2PtSi3 crystallizing in the AlB2-derived hexagonal structure has been known to undergo magnetic ordering around (T0=) 5.5 K. We have investigated the influence of positive and negative chemical pressure on the Kondo effect and T0 by studying Y and La substituted pseudo-ternary solid solutions Ce2-xRxPtSi3 (R= La, Y) by AC and DC magnetic susceptibility, and heat capacity measurements. We find that the dilution of Ce sub-lattice by Y substitution is less effective in reducing T0 when compared with La substituted series. The Kondo temperature as inferred from paramagnetic Curie temperature undergoes an increase with increasing La content, rather than a decrease usually expected for weakening Kondo effect following lattice expansion. This unusual Kondo and magnetic ordering behavior of this solid solution possibly arises from disorder and/or structural features.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Ce2PtSi3; Kondo Effect; Magnetic Ordering
ID Code:92899
Deposited On:06 Jun 2012 13:48
Last Modified:06 Jun 2012 13:48

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