Sound velocity in perovskite manganites La0.67Ca0.33MnO3 with different grain sizes
The longitudinal and shear sound velocities in colossal magnetoresistive material La0.67Ca0.33MnO3 sintered at 1100, 1250 and 1350 °C with average grain size 1, 3 and 5 μm, respectively, have been measured from 80 to 300 K using the pulse-echo-overlap method. A pronounced increase in the longitudina...
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2018
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| Online Access: | http://dspace.uniten.edu.my/jspui/handle/123456789/9422 |
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uniten-123456789-9422 |
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uniten-123456789-94222018-02-28T23:58:33Z Sound velocity in perovskite manganites La0.67Ca0.33MnO3 with different grain sizes Ewe, L.S. Hamadneh, I. Salama, H.A. Abd-Shukor, R. The longitudinal and shear sound velocities in colossal magnetoresistive material La0.67Ca0.33MnO3 sintered at 1100, 1250 and 1350 °C with average grain size 1, 3 and 5 μm, respectively, have been measured from 80 to 300 K using the pulse-echo-overlap method. A pronounced increase in the longitudinal sound velocity was observed in all samples around the insulator-metal transition temperature (TIM∼272 K). XRD patterns showed the orthorhombic structure for all samples. The longitudinal and shear velocities showed the largest hysteresis for the sample with 3 μm grain size. A step-like shear sound velocity anomaly near 120 K during cooling or warming was observed to be dependent on the grain size. © 2007 Elsevier B.V. All rights reserved. 2018-02-28T23:58:33Z 2018-02-28T23:58:33Z 2008 http://dspace.uniten.edu.my/jspui/handle/123456789/9422 |
| repository_type |
Digital Repository |
| institution_category |
Local University |
| institution |
Universiti Tenaga Nasional |
| building |
UNITEN Institutional Repository |
| collection |
Online Access |
| description |
The longitudinal and shear sound velocities in colossal magnetoresistive material La0.67Ca0.33MnO3 sintered at 1100, 1250 and 1350 °C with average grain size 1, 3 and 5 μm, respectively, have been measured from 80 to 300 K using the pulse-echo-overlap method. A pronounced increase in the longitudinal sound velocity was observed in all samples around the insulator-metal transition temperature (TIM∼272 K). XRD patterns showed the orthorhombic structure for all samples. The longitudinal and shear velocities showed the largest hysteresis for the sample with 3 μm grain size. A step-like shear sound velocity anomaly near 120 K during cooling or warming was observed to be dependent on the grain size. © 2007 Elsevier B.V. All rights reserved. |
| author |
Ewe, L.S. Hamadneh, I. Salama, H.A. Abd-Shukor, R. |
| spellingShingle |
Ewe, L.S. Hamadneh, I. Salama, H.A. Abd-Shukor, R. Sound velocity in perovskite manganites La0.67Ca0.33MnO3 with different grain sizes |
| author_facet |
Ewe, L.S. Hamadneh, I. Salama, H.A. Abd-Shukor, R. |
| author_sort |
Ewe, L.S. |
| title |
Sound velocity in perovskite manganites La0.67Ca0.33MnO3 with different grain sizes |
| title_short |
Sound velocity in perovskite manganites La0.67Ca0.33MnO3 with different grain sizes |
| title_full |
Sound velocity in perovskite manganites La0.67Ca0.33MnO3 with different grain sizes |
| title_fullStr |
Sound velocity in perovskite manganites La0.67Ca0.33MnO3 with different grain sizes |
| title_full_unstemmed |
Sound velocity in perovskite manganites La0.67Ca0.33MnO3 with different grain sizes |
| title_sort |
sound velocity in perovskite manganites la0.67ca0.33mno3 with different grain sizes |
| publishDate |
2018 |
| url |
http://dspace.uniten.edu.my/jspui/handle/123456789/9422 |
| first_indexed |
2018-09-05T08:12:38Z |
| last_indexed |
2018-09-05T08:12:38Z |
| _version_ |
1610754459858632704 |