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Disorder effects at low temperatures in La 0 : 7 2 x Y x Ca 0 : 3 MnO 3 manganites
| Content Provider | Semantic Scholar |
|---|---|
| Author | Gusmãoa, M. A. Ghivelderb, L. Freitasb, R. S. Ribeiroc, R. A. Limac, O. F. De Damayd, F. Cohend, L. F. |
| Copyright Year | 2003 |
| Abstract | With the aim of probing the effect of magnetic disorder in the low-temperature excitations of manganites, specific heat measurements were performed in zero field, and in magnetic fields up to 9 T in polycrystalline samples of La0:72xYxCa0:3MnO3; with Y concentrations x 1⁄4 0; 0.10, and 0.15. Yttrium doping yielded the appearance of a cluster-glass state, giving rise to unusual low-temperature behavior of the specific heat. The main feature observed in the results is a strong enhancement of the specific heat linear term, which is interpreted as a direct consequence of magnetic disorder. The analysis was further corroborated by resistivity measurements in the same compounds. q 2003 Elsevier Ltd. All rights reserved. PACS: 75.40.Cx; 75.30. 2 m; 75.30.Ds |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.if.ufrgs.br/~magusmao/files/mangSSC03.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |