Mohapatra, Niharika ; Iyer, Kartik K. ; Rayaprol, Sudhindra ; Sampathkumaran, E. V. (2007) Geometrically frustrated magnetic behavior of Sr3NiRhO6 and Sr3NiPtO6 Physical Review B: Condensed Matter and Materials Physics, 75 (21). 214422_1-214422_6. ISSN 1098-0121
|
PDF
- Author Version
258kB |
Official URL: http://prb.aps.org/abstract/PRB/v75/i21/e214422
Related URL: http://dx.doi.org/10.1103/PhysRevB.75.214422
Abstract
The results of ac and dc magnetic susceptibility (χ), isothermal magnetization and heat-capacity (C) measurements as a function of temperature (T) are reported for Sr3NiRhO6 and Sr3NiPtO6, containing magnetic chains arranged in a triangular fashion in the basal plane and crystallizing in K4CdCl6-derived rhombohedral structure. The results establish that both the compounds are magnetically frustrated, however, in different ways. In the case of the Rh compound, the χ data reveal that there are two magnetic transitions, one in the range 10-15 K and the other appearing as a smooth crossover near 45 K, with a large frequency dependence of ac χ in the range 10-40 K; in addition, the features in C(T) are smeared out at these temperatures. The magnetic properties are comparable to those of previously known few compounds with "partially disordered antiferromagnetic structure". On the other hand, for Sr3NiPtO6, there is no evidence for long-range magnetic ordering down to 1.8 K despite a large value of paramagnetic Curie temperature. In this sense, this compound may be classified as a spin liquid arising out of geometrical frustration.
Item Type: | Article |
---|---|
Source: | Copyright of this article belongs to The American Physical Society. |
ID Code: | 45669 |
Deposited On: | 29 Jun 2011 03:31 |
Last Modified: | 18 May 2016 01:52 |
Repository Staff Only: item control page