Room temperature giant magnetoimpedance in polycrystalline La0.75Ba0.25MnO3
We report the magnetic field dependence of electrical impedance Z in polycrystalline La0.75Ba0.25MnO3 a function of frequency from f = 1 MHz to 1 GHz at room temperature. The magnetoimpedance [MI = ΔZ/Z(0) where ΔZ = Z(H)-Z(0)] is −37.5 % (-58.5%) at 1(10) MHz for H = 1.2 kOe, which far exceeds mere...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2016-05-01
|
| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/1.4943244 |
| _version_ | 1819053446977814528 |
|---|---|
| author | Pawan Kumar Km Rubi R. Mahendiran |
| author_facet | Pawan Kumar Km Rubi R. Mahendiran |
| author_sort | Pawan Kumar |
| collection | DOAJ |
| description | We report the magnetic field dependence of electrical impedance Z in polycrystalline La0.75Ba0.25MnO3 a function of frequency from f = 1 MHz to 1 GHz at room temperature. The magnetoimpedance [MI = ΔZ/Z(0) where ΔZ = Z(H)-Z(0)] is −37.5 % (-58.5%) at 1(10) MHz for H = 1.2 kOe, which far exceeds mere -1.15% dc magnetoresistance. As f increases above 10 MHz, MI decreases in magnitude and changes sign from negative to positive. The change in sign of MI results from the transition of a single peak at H = 0 to two peaks at H = ± Hp accompanied by a minimum at the origin. Hp shifts towards higher field with increasing frequency. The occurrence of giant radio-frequency magnetoimpedance is promising for low-field sensor applications. |
| first_indexed | 2024-12-21T12:35:52Z |
| format | Article |
| id | doaj.art-aff75e667ea549e4804ca5bed9ac0d1e |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-12-21T12:35:52Z |
| publishDate | 2016-05-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-aff75e667ea549e4804ca5bed9ac0d1e2022-12-21T19:03:55ZengAIP Publishing LLCAIP Advances2158-32262016-05-0165055913055913-710.1063/1.4943244059691ADVRoom temperature giant magnetoimpedance in polycrystalline La0.75Ba0.25MnO3Pawan Kumar0Km Rubi1R. Mahendiran2Department of Physics, 2 Science Drive 3, Faculty of Science, National University of Singapore, Singapore – 117551, SingaporeDepartment of Physics, 2 Science Drive 3, Faculty of Science, National University of Singapore, Singapore – 117551, SingaporeDepartment of Physics, 2 Science Drive 3, Faculty of Science, National University of Singapore, Singapore – 117551, SingaporeWe report the magnetic field dependence of electrical impedance Z in polycrystalline La0.75Ba0.25MnO3 a function of frequency from f = 1 MHz to 1 GHz at room temperature. The magnetoimpedance [MI = ΔZ/Z(0) where ΔZ = Z(H)-Z(0)] is −37.5 % (-58.5%) at 1(10) MHz for H = 1.2 kOe, which far exceeds mere -1.15% dc magnetoresistance. As f increases above 10 MHz, MI decreases in magnitude and changes sign from negative to positive. The change in sign of MI results from the transition of a single peak at H = 0 to two peaks at H = ± Hp accompanied by a minimum at the origin. Hp shifts towards higher field with increasing frequency. The occurrence of giant radio-frequency magnetoimpedance is promising for low-field sensor applications.http://dx.doi.org/10.1063/1.4943244 |
| spellingShingle | Pawan Kumar Km Rubi R. Mahendiran Room temperature giant magnetoimpedance in polycrystalline La0.75Ba0.25MnO3 AIP Advances |
| title | Room temperature giant magnetoimpedance in polycrystalline La0.75Ba0.25MnO3 |
| title_full | Room temperature giant magnetoimpedance in polycrystalline La0.75Ba0.25MnO3 |
| title_fullStr | Room temperature giant magnetoimpedance in polycrystalline La0.75Ba0.25MnO3 |
| title_full_unstemmed | Room temperature giant magnetoimpedance in polycrystalline La0.75Ba0.25MnO3 |
| title_short | Room temperature giant magnetoimpedance in polycrystalline La0.75Ba0.25MnO3 |
| title_sort | room temperature giant magnetoimpedance in polycrystalline la0 75ba0 25mno3 |
| url | http://dx.doi.org/10.1063/1.4943244 |
| work_keys_str_mv | AT pawankumar roomtemperaturegiantmagnetoimpedanceinpolycrystallinela075ba025mno3 AT kmrubi roomtemperaturegiantmagnetoimpedanceinpolycrystallinela075ba025mno3 AT rmahendiran roomtemperaturegiantmagnetoimpedanceinpolycrystallinela075ba025mno3 |