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|Title:||Critical behavior and the absence of glass state in ferromagnetic La0.7Ca0.3CoO3 nanowires||Authors:||Wang, Yang
Fan, Hong Jin
|Issue Date:||2011||Source:||Wang, Y., & Fan, H. J. (2012). Critical behavior and the absence of glass state in ferromagnetic La0.7Ca0.3CoO3 nanowires. Acta Materialia, 60(3), 1238-1245.||Series/Report no.:||Acta materialia||Abstract:||We report a systematic study of the magnetic and thermodynamic properties of uniform La0.7Ca0.3CoO3 nanowires prepared by a hydrothermal method, and compare them with the bulk counterpart. The nanowires, ∼59 nm in diameter, are single crystalline as revealed by electron microscopy. With decreasing temperature, the bulk La0.7Ca0.3CoO3 shows a ferromagnetism followed by a reentrant glass state, whereas the nanowires show only a purely ferromagnetic ground state. The thermopower and specific heat results indicate that there exist enhanced spin and/or orbital fluctuations in the nanowires that could be responsible for the absence of the glass state. Critical behavior analysis shows that the nanowires fall into a three-dimensional Heisenberg ferromagnet class.||URI:||https://hdl.handle.net/10356/96621
|ISSN:||1359-6454||DOI:||http://dx.doi.org/10.1016/j.actamat.2011.11.036||Rights:||© 2011 Acta Materialia Inc.||metadata.item.grantfulltext:||none||metadata.item.fulltext:||No Fulltext|
|Appears in Collections:||SPMS Journal Articles|
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