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Elastic moduli and sound velocity in La1-xSrxMnO 3 (x = 0 to 0.3)

The longitudinal and shear sound velocity in colossal magnetoresistive La1-xSrxMnO3 (x = 0.0, 0.05, 0.15 and 0.3) were measured using the pulse-echo-overlap technique in the temperature range of 80 to 300 K. An abrupt increase in the longitudinal velocity was observed immediately below the insulator...

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Main Authors: Ewe L.S., Abd-Shukor R.
Other Authors: 58032789200
Format: Article
Published: 2023
Subjects:
Colossal magnetoresistance
Debye temperature
Sound velocity
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spelling my.uniten.dspace-307332023-12-29T15:52:05Z Elastic moduli and sound velocity in La1-xSrxMnO 3 (x = 0 to 0.3) Ewe L.S. Abd-Shukor R. 58032789200 7004750914 Colossal magnetoresistance Debye temperature Sound velocity The longitudinal and shear sound velocity in colossal magnetoresistive La1-xSrxMnO3 (x = 0.0, 0.05, 0.15 and 0.3) were measured using the pulse-echo-overlap technique in the temperature range of 80 to 300 K. An abrupt increase in the longitudinal velocity was observed immediately below the insulator-metal transition (Tim) in the x = 0.05 and 0.15 samples. This anomaly shifted towards higher temperature with an increase in Sr content. The absolute velocities (measured at 80 K) increased with Sr content. Hystereses in the longitudinal and shear velocity were observed in the x = 0.05 and 0.15 samples. A step-like longitudinal sound velocity anomaly between 150 K and 220 K during warming and cooling was observed in the x = 0.05 sample. A sudden hardening was observed for longitudinal and shear sound velocity coinciding with second broad resistance peak at temperature below Tim in x = 0.15 sample. The characteristic Debye temperature increases as Sr content was increased, indicating a hardening trend. These results indicate the importance of phonons in the transport mechanism of these colossal magnetoresistive materials. � 2010 World Scientific Publishing Company. Final 2023-12-29T07:52:05Z 2023-12-29T07:52:05Z 2010 Article 10.1142/S0217979210055032 2-s2.0-77951589810 https://www.scopus.com/inward/record.uri?eid=2-s2.0-77951589810&doi=10.1142%2fS0217979210055032&partnerID=40&md5=0e7210447ac9eaf86397eba552cf7969 https://irepository.uniten.edu.my/handle/123456789/30733 24 4 465 478 Scopus
institution Universiti Tenaga Nasional
building UNITEN Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tenaga Nasional
content_source UNITEN Institutional Repository
url_provider http://dspace.uniten.edu.my/
topic Colossal magnetoresistance
Debye temperature
Sound velocity
spellingShingle Colossal magnetoresistance
Debye temperature
Sound velocity
Ewe L.S.
Abd-Shukor R.
Elastic moduli and sound velocity in La1-xSrxMnO 3 (x = 0 to 0.3)
description The longitudinal and shear sound velocity in colossal magnetoresistive La1-xSrxMnO3 (x = 0.0, 0.05, 0.15 and 0.3) were measured using the pulse-echo-overlap technique in the temperature range of 80 to 300 K. An abrupt increase in the longitudinal velocity was observed immediately below the insulator-metal transition (Tim) in the x = 0.05 and 0.15 samples. This anomaly shifted towards higher temperature with an increase in Sr content. The absolute velocities (measured at 80 K) increased with Sr content. Hystereses in the longitudinal and shear velocity were observed in the x = 0.05 and 0.15 samples. A step-like longitudinal sound velocity anomaly between 150 K and 220 K during warming and cooling was observed in the x = 0.05 sample. A sudden hardening was observed for longitudinal and shear sound velocity coinciding with second broad resistance peak at temperature below Tim in x = 0.15 sample. The characteristic Debye temperature increases as Sr content was increased, indicating a hardening trend. These results indicate the importance of phonons in the transport mechanism of these colossal magnetoresistive materials. � 2010 World Scientific Publishing Company.
author2 58032789200
author_facet 58032789200
Ewe L.S.
Abd-Shukor R.
format Article
author Ewe L.S.
Abd-Shukor R.
author_sort Ewe L.S.
title Elastic moduli and sound velocity in La1-xSrxMnO 3 (x = 0 to 0.3)
title_short Elastic moduli and sound velocity in La1-xSrxMnO 3 (x = 0 to 0.3)
title_full Elastic moduli and sound velocity in La1-xSrxMnO 3 (x = 0 to 0.3)
title_fullStr Elastic moduli and sound velocity in La1-xSrxMnO 3 (x = 0 to 0.3)
title_full_unstemmed Elastic moduli and sound velocity in La1-xSrxMnO 3 (x = 0 to 0.3)
title_sort elastic moduli and sound velocity in la1-xsrxmno 3 (x = 0 to 0.3)
publishDate 2023
_version_ 1806424544794116096
score 13.222552

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