Critical behavior in single-crystalline La0.67Sr0.33CoO3

Khan, N. ; Midya, A. ; Mydeen, K. ; Mandal, P. ; Loidl, A. ; Prabhakaran, D. (2010) Critical behavior in single-crystalline La0.67Sr0.33CoO3 Physical Review B: Condensed Matter and Materials Physics, 82 (6). ISSN 1098-0121

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Official URL: http://doi.org/10.1103/PhysRevB.82.064422

Related URL: http://dx.doi.org/10.1103/PhysRevB.82.064422

Abstract

The critical behavior of La0.67Sr0.33CoO3 single crystal has been investigated from the bulk magnetization measurements around the Curie temperature (T C). The detailed analysis of the magnetization indicates the occurrence of a continuous ferromagnetic to paramagnetic phase transition at 223.0 K. The critical exponents β= 0.361±0.007, γ= 1.31±0.001, and δ= 4.64±0.01 characterizing this second order phase transition, have been estimated using different techniques such as the Kouvel-Fisher plot, the Arrott-Noaks plot, and critical isotherm analysis. With these values of T C, β, and γ, one can scale the magnetization below and above T C following a single equation of state. The consistency in the values of the critical exponents obtained from different methods and the well-obeyed scaling behavior confirm that the calculated exponents are unambiguous and purely intrinsic to the system. These values of the exponents match well with those theoretically predicted for the three-dimensional Heisenberg model with nearest-neighbor interaction.

Item Type:Article
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ID Code:122845
Deposited On:17 Aug 2021 10:28
Last Modified:17 Aug 2021 10:28

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