Magnetic field dependence of electrical resistivity and thermopower in Ni50Mn37Sn13 ribbons
We report magnetization, magnetoresistance (MR) and magnetothermopower (MTEP) of melt spun Ni 50Mn37Sn13 ribbons which exhibit an austentite to martensite phase transition at a temperature (TM ) ≈ 294 K. Upon cooling from 400 K, dc-resistivity and thermopower show abrupt changes at TM , indicating a...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2015
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| Online Access: | https://hdl.handle.net/10356/103358 http://hdl.handle.net/10220/38739 |
| _version_ | 1811688485340315648 |
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| author | Maheswar Repaka, Durga Venkata Ramanujan, Raju Vijayaraghavan Chen, X. Mahendiran, R. |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Maheswar Repaka, Durga Venkata Ramanujan, Raju Vijayaraghavan Chen, X. Mahendiran, R. |
| author_sort | Maheswar Repaka, Durga Venkata |
| collection | NTU |
| description | We report magnetization, magnetoresistance (MR) and magnetothermopower (MTEP) of melt spun Ni 50Mn37Sn13 ribbons which exhibit an austentite to martensite phase transition at a temperature (TM ) ≈ 294 K. Upon cooling from 400 K, dc-resistivity and thermopower show abrupt changes at TM , indicating a change in the electronic density of states. The thermopower is negative from 400 K down to 10 K. Application of a magnetic field of μ 0 H = 5 T decreases TM by 5 K and induces large negative MR (-23%) but positive MTEP (9%) near TM . While the MR is appreciable from TM down to 10 K, MTEP is significant only below 60 K (MR = -2.5% and MTEP = +300% at 10 K). The magnetic field dependence of resistivity and thermopower show either reversible or irreversible behavior near TM , depending on whether the sample is zero-field cooled or field-cooled, which indicates that the electronic band structure near TM is magnetic history dependent. |
| first_indexed | 2024-10-01T05:32:57Z |
| format | Journal Article |
| id | ntu-10356/103358 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:32:57Z |
| publishDate | 2015 |
| record_format | dspace |
| spelling | ntu-10356/1033582023-07-14T15:55:36Z Magnetic field dependence of electrical resistivity and thermopower in Ni50Mn37Sn13 ribbons Maheswar Repaka, Durga Venkata Ramanujan, Raju Vijayaraghavan Chen, X. Mahendiran, R. School of Materials Science & Engineering We report magnetization, magnetoresistance (MR) and magnetothermopower (MTEP) of melt spun Ni 50Mn37Sn13 ribbons which exhibit an austentite to martensite phase transition at a temperature (TM ) ≈ 294 K. Upon cooling from 400 K, dc-resistivity and thermopower show abrupt changes at TM , indicating a change in the electronic density of states. The thermopower is negative from 400 K down to 10 K. Application of a magnetic field of μ 0 H = 5 T decreases TM by 5 K and induces large negative MR (-23%) but positive MTEP (9%) near TM . While the MR is appreciable from TM down to 10 K, MTEP is significant only below 60 K (MR = -2.5% and MTEP = +300% at 10 K). The magnetic field dependence of resistivity and thermopower show either reversible or irreversible behavior near TM , depending on whether the sample is zero-field cooled or field-cooled, which indicates that the electronic band structure near TM is magnetic history dependent. Published version 2015-09-23T06:16:14Z 2019-12-06T21:10:49Z 2015-09-23T06:16:14Z 2019-12-06T21:10:49Z 2015 2015 Journal Article Maheswar Repaka, D. V., Chen, X., Ramanujan, R. V., & Mahendiran, R. (2015). Magnetic field dependence of electrical resistivity and thermopower in Ni50Mn37Sn13 ribbons. AIP Advances, 5(9), 097116-. 2158-3226 https://hdl.handle.net/10356/103358 http://hdl.handle.net/10220/38739 10.1063/1.4930592 en AIP Advances © 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License. [http://dx.doi.org/10.1063/1.4930592] application/pdf |
| spellingShingle | Maheswar Repaka, Durga Venkata Ramanujan, Raju Vijayaraghavan Chen, X. Mahendiran, R. Magnetic field dependence of electrical resistivity and thermopower in Ni50Mn37Sn13 ribbons |
| title | Magnetic field dependence of electrical resistivity and thermopower in Ni50Mn37Sn13 ribbons |
| title_full | Magnetic field dependence of electrical resistivity and thermopower in Ni50Mn37Sn13 ribbons |
| title_fullStr | Magnetic field dependence of electrical resistivity and thermopower in Ni50Mn37Sn13 ribbons |
| title_full_unstemmed | Magnetic field dependence of electrical resistivity and thermopower in Ni50Mn37Sn13 ribbons |
| title_short | Magnetic field dependence of electrical resistivity and thermopower in Ni50Mn37Sn13 ribbons |
| title_sort | magnetic field dependence of electrical resistivity and thermopower in ni50mn37sn13 ribbons |
| url | https://hdl.handle.net/10356/103358 http://hdl.handle.net/10220/38739 |
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