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2007 J. Phys.: Condens. Matter 19 106202 (10pp) doi: 10.1088/0953-8984/19/10/106202
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Abstract. Linear and non-linear dynamic properties of a re-entrant ferromagnetic polycrystalline bulk La0.85Ca0.15Mn0.95Fe0.05O3 sample are studied using AC susceptibility. This sample composition shows a transition from paramagnetic (PM) to ferromagnetic (FM) at around 174 K and to spin glass (SG) at ~100 K. The dynamic behaviour is investigated in the intermediate temperature range (Tg<T<Tc). A prominent non-linear susceptibility is observed in this range, signifying the decomposition of the FM network into clusters by a random magnetic field which is expected to be generated by PM spins in the FM region. The results are supported by a study of the AC frequency and DC field effect on the non-linear susceptibility.
Print publication: Issue 10 (14 March 2007) |
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