Ultrasonic anomaly near the charge ordering transition in Sr-doped Nd0.3La0.2Ca0.5−xSrxMnO3 manganites
Sr doping in the charge-ordered compound Nd0.3La0.2Ca0.5−xSrxMnO3 has been systematically studied to examine its effect on ultrasonic velocity and elastic moduli as well as magnetic and electrical transport properties. DC electrical resistivity, ρ and AC susceptibility, χ1 measurements showed all sa...
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2013
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| Online Access: | DOI:10.1007/s10948-013-2389-8 DOI:10.1007/s10948-013-2389-8 |
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uthm-98232018-08-13T03:21:32Z Ultrasonic anomaly near the charge ordering transition in Sr-doped Nd0.3La0.2Ca0.5−xSrxMnO3 manganites Shamsuddin, S. Supardan, S. N. M. A. Ibrahim, Abdel-Baset Yahya, A. K. QC Physics Sr doping in the charge-ordered compound Nd0.3La0.2Ca0.5−xSrxMnO3 has been systematically studied to examine its effect on ultrasonic velocity and elastic moduli as well as magnetic and electrical transport properties. DC electrical resistivity, ρ and AC susceptibility, χ1 measurements showed all samples exhibit metal-insulator (MI) behavior accompanied by ferromagnetic-paramagnetic (FM-PM) transition where the MI transition temperature, TMI and FM-PM transition temperature, TC increased with Sr content indicating the enhancement of double-exchange mechanism. Analysis of the resistivity change with respect to temperature, d lnρ/dT −1 versus T indicates onset of charge-ordering (CO) state where its CO transition temperature, TCO decreased with Sr content indicating weakening of the CO state. On the other hand, both absolute longitudinal and shear velocities as well as elastic moduli measured at 80 K increased significantly with Sr doping indicating improvement in elastic properties, which is suggested to be due to the increase in formation of ferromagnetic domains. A longitudinal velocity anomaly characterized by a slope change around the vicinity of TCO was observed for all samples. The longitudinal elastic anomaly is attributed to the Jahn–Teller (JT) effect of Mn3+ ions where analysis of the anomaly using the mean-field theory suggests involvement of the JT effect in the samples, which transforms from dynamic to static type with decreasing temperature. The elastic anomaly shifted down from 222 K (x = 0) to 205 K (x = 0.05) indicating that the static JT effect was weakened with Sr content. Springer US 2013 Article PeerReviewed DOI:10.1007/s10948-013-2389-8 Shamsuddin, S. and Supardan, S. N. and M. A. Ibrahim, Abdel-Baset and Yahya, A. K. (2013) Ultrasonic anomaly near the charge ordering transition in Sr-doped Nd0.3La0.2Ca0.5−xSrxMnO3 manganites. Journal of Superconductivity and Novel Magnetism, 27 . pp. 1229-1234. ISSN 15571939 http://eprints.uthm.edu.my/9823/ |
| repository_type |
Digital Repository |
| institution_category |
Local University |
| institution |
Universiti Tun Hussein Onn Malaysia |
| building |
UTHM Institutional Repository |
| collection |
Online Access |
| topic |
QC Physics |
| spellingShingle |
QC Physics Shamsuddin, S. Supardan, S. N. M. A. Ibrahim, Abdel-Baset Yahya, A. K. Ultrasonic anomaly near the charge ordering transition in Sr-doped Nd0.3La0.2Ca0.5−xSrxMnO3 manganites |
| description |
Sr doping in the charge-ordered compound
Nd0.3La0.2Ca0.5−xSrxMnO3 has been systematically studied
to examine its effect on ultrasonic velocity and elastic
moduli as well as magnetic and electrical transport properties.
DC electrical resistivity, ρ and AC susceptibility, χ1
measurements showed all samples exhibit metal-insulator
(MI) behavior accompanied by ferromagnetic-paramagnetic
(FM-PM) transition where the MI transition temperature,
TMI and FM-PM transition temperature, TC increased with
Sr content indicating the enhancement of double-exchange
mechanism. Analysis of the resistivity change with respect
to temperature, d lnρ/dT
−1 versus T indicates onset of
charge-ordering (CO) state where its CO transition temperature,
TCO decreased with Sr content indicating weakening
of the CO state. On the other hand, both absolute longitudinal
and shear velocities as well as elastic moduli measured
at 80 K increased significantly with Sr doping indicating
improvement in elastic properties, which is suggested to be
due to the increase in formation of ferromagnetic domains.
A longitudinal velocity anomaly characterized by a slope
change around the vicinity of TCO was observed for all samples.
The longitudinal elastic anomaly is attributed to the
Jahn–Teller (JT) effect of Mn3+ ions where analysis of the
anomaly using the mean-field theory suggests involvement
of the JT effect in the samples, which transforms from dynamic
to static type with decreasing temperature. The elastic
anomaly shifted down from 222 K (x = 0) to 205 K
(x = 0.05) indicating that the static JT effect was weakened
with Sr content. |
| format |
Article |
| author |
Shamsuddin, S. Supardan, S. N. M. A. Ibrahim, Abdel-Baset Yahya, A. K. |
| author_facet |
Shamsuddin, S. Supardan, S. N. M. A. Ibrahim, Abdel-Baset Yahya, A. K. |
| author_sort |
Shamsuddin, S. |
| title |
Ultrasonic anomaly near the charge ordering transition in Sr-doped Nd0.3La0.2Ca0.5−xSrxMnO3 manganites |
| title_short |
Ultrasonic anomaly near the charge ordering transition in Sr-doped Nd0.3La0.2Ca0.5−xSrxMnO3 manganites |
| title_full |
Ultrasonic anomaly near the charge ordering transition in Sr-doped Nd0.3La0.2Ca0.5−xSrxMnO3 manganites |
| title_fullStr |
Ultrasonic anomaly near the charge ordering transition in Sr-doped Nd0.3La0.2Ca0.5−xSrxMnO3 manganites |
| title_full_unstemmed |
Ultrasonic anomaly near the charge ordering transition in Sr-doped Nd0.3La0.2Ca0.5−xSrxMnO3 manganites |
| title_sort |
ultrasonic anomaly near the charge ordering transition in sr-doped nd0.3la0.2ca0.5−xsrxmno3 manganites |
| publisher |
Springer US |
| publishDate |
2013 |
| url |
DOI:10.1007/s10948-013-2389-8 DOI:10.1007/s10948-013-2389-8 |
| first_indexed |
2018-09-05T11:53:58Z |
| last_indexed |
2018-09-05T11:53:58Z |
| _version_ |
1610768384716177408 |