Ultrasonic velocity and elastic anomaly in charge-ordered Nd₀.₅Ca₀.₅Mn₁₋ₓCrₓO₃, Nd₀.₃La₀.₂Ca₀.₅₋ᵧSrᵧMnO₃ and Dy₀.₅₋zErzBa₀.₅CoO₃ magnetic ceramics / Suhadir Shamsuddin
Three series of charge-ordered compounds Nd0.5Ca0.5Mn1-xCrxO3 (NCMCO) (0≤x≤0.05), Nd₀.₃La₀.₂Ca₀.₅₋ᵧSrᵧMnO₃ (NLCSMO) (0≤y≤0.05) and Dy₀.₅₋zErzBa₀.₅CoO₃ (DEBCO) (0≤z≤0.05) ceramics were prepared using the solid-state reaction method. For NCMCO series, resistivity and susceptibility measurements for th...
| Main Author: | |
|---|---|
| Format: | Book Section |
| Language: | English |
| Published: |
Institute of Graduate Studies, UiTM
2015
|
| Subjects: | |
| Online Access: | http://ir.uitm.edu.my/id/eprint/19391/ http://ir.uitm.edu.my/id/eprint/19391/1/ABS_SUHADIR%20SHAMSUDDIN%20TDRA%20VOL%207%20IGS%2015.pdf |
| id |
uitm-19391 |
|---|---|
| recordtype |
eprints |
| spelling |
uitm-193912018-06-11T06:13:50Z http://ir.uitm.edu.my/id/eprint/19391/ Ultrasonic velocity and elastic anomaly in charge-ordered Nd₀.₅Ca₀.₅Mn₁₋ₓCrₓO₃, Nd₀.₃La₀.₂Ca₀.₅₋ᵧSrᵧMnO₃ and Dy₀.₅₋zErzBa₀.₅CoO₃ magnetic ceramics / Suhadir Shamsuddin Shamsuddin, Suhadir Malaysia Three series of charge-ordered compounds Nd0.5Ca0.5Mn1-xCrxO3 (NCMCO) (0≤x≤0.05), Nd₀.₃La₀.₂Ca₀.₅₋ᵧSrᵧMnO₃ (NLCSMO) (0≤y≤0.05) and Dy₀.₅₋zErzBa₀.₅CoO₃ (DEBCO) (0≤z≤0.05) ceramics were prepared using the solid-state reaction method. For NCMCO series, resistivity and susceptibility measurements for the x=0 sample showed an insulating behavior and an anti-ferromagnetic (AFM) transition at 230 K as well as a charge-ordering (CO) transition at 280 K. The substitution of Cr induces a ferromagnetic-paramagnetic (FM-PM) and metal-insulator (MI) transition as well as gradually suppressing the CO state due to weakening of the Jahn-Teller (JT) effect. Quenching to reduce the oxygen content of the x=0.05 sample caused the MI transition temperature to shift to lower temperatures most likely due to oxygen reduction. On the other hand, both longitudinal and shear velocities at 100 K increased significantly with Cr substitution indicating improvement in elastic properties. However, quenching of the x=0.05 sample slightly decreased both velocities and related elastic moduli… Institute of Graduate Studies, UiTM 2015 Book Section PeerReviewed text en http://ir.uitm.edu.my/id/eprint/19391/1/ABS_SUHADIR%20SHAMSUDDIN%20TDRA%20VOL%207%20IGS%2015.pdf Shamsuddin, Suhadir (2015) Ultrasonic velocity and elastic anomaly in charge-ordered Nd₀.₅Ca₀.₅Mn₁₋ₓCrₓO₃, Nd₀.₃La₀.₂Ca₀.₅₋ᵧSrᵧMnO₃ and Dy₀.₅₋zErzBa₀.₅CoO₃ magnetic ceramics / Suhadir Shamsuddin. In: The Doctoral Research Abstracts. IGS Biannual Publication, 7 (7). Institute of Graduate Studies, UiTM, Shah Alam. |
| repository_type |
Digital Repository |
| institution_category |
Local University |
| institution |
Universiti Teknologi MARA |
| building |
UiTM Institutional Repository |
| collection |
Online Access |
| language |
English |
| topic |
Malaysia |
| spellingShingle |
Malaysia Shamsuddin, Suhadir Ultrasonic velocity and elastic anomaly in charge-ordered Nd₀.₅Ca₀.₅Mn₁₋ₓCrₓO₃, Nd₀.₃La₀.₂Ca₀.₅₋ᵧSrᵧMnO₃ and Dy₀.₅₋zErzBa₀.₅CoO₃ magnetic ceramics / Suhadir Shamsuddin |
| description |
Three series of charge-ordered compounds Nd0.5Ca0.5Mn1-xCrxO3 (NCMCO) (0≤x≤0.05), Nd₀.₃La₀.₂Ca₀.₅₋ᵧSrᵧMnO₃ (NLCSMO) (0≤y≤0.05) and Dy₀.₅₋zErzBa₀.₅CoO₃ (DEBCO) (0≤z≤0.05) ceramics were prepared using the solid-state reaction method. For NCMCO series, resistivity and susceptibility measurements for the x=0 sample showed an insulating behavior and an anti-ferromagnetic (AFM) transition at 230 K as well as a charge-ordering (CO) transition at 280 K. The substitution of Cr induces a ferromagnetic-paramagnetic (FM-PM) and metal-insulator (MI) transition as well as gradually suppressing the CO state due to weakening of the Jahn-Teller (JT) effect. Quenching to reduce the oxygen content of the x=0.05 sample caused the MI transition temperature to shift to lower temperatures most likely due to oxygen reduction. On the other hand, both longitudinal and shear velocities at 100 K increased significantly with Cr substitution indicating improvement in elastic properties. However, quenching of the x=0.05 sample slightly decreased both velocities and related elastic moduli… |
| format |
Book Section |
| author |
Shamsuddin, Suhadir |
| author_facet |
Shamsuddin, Suhadir |
| author_sort |
Shamsuddin, Suhadir |
| title |
Ultrasonic velocity and elastic anomaly in charge-ordered Nd₀.₅Ca₀.₅Mn₁₋ₓCrₓO₃, Nd₀.₃La₀.₂Ca₀.₅₋ᵧSrᵧMnO₃ and Dy₀.₅₋zErzBa₀.₅CoO₃ magnetic ceramics / Suhadir Shamsuddin |
| title_short |
Ultrasonic velocity and elastic anomaly in charge-ordered Nd₀.₅Ca₀.₅Mn₁₋ₓCrₓO₃, Nd₀.₃La₀.₂Ca₀.₅₋ᵧSrᵧMnO₃ and Dy₀.₅₋zErzBa₀.₅CoO₃ magnetic ceramics / Suhadir Shamsuddin |
| title_full |
Ultrasonic velocity and elastic anomaly in charge-ordered Nd₀.₅Ca₀.₅Mn₁₋ₓCrₓO₃, Nd₀.₃La₀.₂Ca₀.₅₋ᵧSrᵧMnO₃ and Dy₀.₅₋zErzBa₀.₅CoO₃ magnetic ceramics / Suhadir Shamsuddin |
| title_fullStr |
Ultrasonic velocity and elastic anomaly in charge-ordered Nd₀.₅Ca₀.₅Mn₁₋ₓCrₓO₃, Nd₀.₃La₀.₂Ca₀.₅₋ᵧSrᵧMnO₃ and Dy₀.₅₋zErzBa₀.₅CoO₃ magnetic ceramics / Suhadir Shamsuddin |
| title_full_unstemmed |
Ultrasonic velocity and elastic anomaly in charge-ordered Nd₀.₅Ca₀.₅Mn₁₋ₓCrₓO₃, Nd₀.₃La₀.₂Ca₀.₅₋ᵧSrᵧMnO₃ and Dy₀.₅₋zErzBa₀.₅CoO₃ magnetic ceramics / Suhadir Shamsuddin |
| title_sort |
ultrasonic velocity and elastic anomaly in charge-ordered nd₀.₅ca₀.₅mn₁₋ₓcrₓo₃, nd₀.₃la₀.₂ca₀.₅₋ᵧsrᵧmno₃ and dy₀.₅₋zerzba₀.₅coo₃ magnetic ceramics / suhadir shamsuddin |
| publisher |
Institute of Graduate Studies, UiTM |
| publishDate |
2015 |
| url |
http://ir.uitm.edu.my/id/eprint/19391/ http://ir.uitm.edu.my/id/eprint/19391/1/ABS_SUHADIR%20SHAMSUDDIN%20TDRA%20VOL%207%20IGS%2015.pdf |
| first_indexed |
2023-09-18T23:02:28Z |
| last_indexed |
2023-09-18T23:02:28Z |
| _version_ |
1777418264453840896 |