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https://hdl.handle.net/10356/96621
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 http://hdl.handle.net/10220/10366 |
ISSN: | 1359-6454 | DOI: | 10.1016/j.actamat.2011.11.036 | Schools: | School of Physical and Mathematical Sciences | Rights: | © 2011 Acta Materialia Inc. | Fulltext Permission: | none | Fulltext Availability: | No Fulltext |
Appears in Collections: | SPMS Journal Articles |
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