Mukherjee, K. ; Iyer, Kartik K. ; Sampathkumaran, E. V. (2012) Contrasting magnetic behavior of fine particles of some Kondo lattices Solid State Communications, 152 (7). pp. 606-611. ISSN 0038-1098
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/j.ssc.2012.01.022
Abstract
We have investigated the magnetic behavior of ball-milled fine particles of well-known Kondo lattices, CeAu2Si2, CePd2Si2 and CeAl2, by magnetization and heat-capacity studies in order to understand the magnetic behavior when the particle size is reduced. These compounds have been known to order antiferromagnetically in the bulk form near (TN=) 10, 10 and 3.8 K respectively. We find that the features due to magnetic ordering get suppressed to temperatures below 1.8 K in the case of fine particles of ternary alloys, though trivalence of Ce as inferred from the effective moment remains unchanged. In contrast to this, in CeAl2, there appears to be a marginal enhancement of TN, when the particle size is reduced to less than a micron. These results can be consistently understood by proposing that these compounds move toward left in the Doniach magnetic phase-diagram, for instance, due to relatively more 4f-localization, as the particle size is reduced.
Item Type: | Article |
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Source: | Copyright of this article belongs to Elsevier Science. |
Keywords: | A. Nanostructured Intermetallics; D. Magnetic Properties |
ID Code: | 92921 |
Deposited On: | 06 Jun 2012 13:52 |
Last Modified: | 19 May 2016 06:09 |
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