Determining Curie temperatures in dilute ferromagnetic semiconductors: high Curie temperature (Ga,Mn)As
In this paper, we use simultaneous magnetometry and electrical transport measurements to critically examine ways in which the Curie temperature (TC) values have been determined in studies of dilute magnetic semiconductors. We show that, in sufficiently homogeneous samples, TC can be accurately deter...
| Main Authors: | , , , , , |
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| Format: | Article |
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American Institute of Physics
2014
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| Online Access: | https://eprints.nottingham.ac.uk/34352/ |
| _version_ | 1848794831940222976 |
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| author | Wang, M. Marshall, R.A. Edmonds, K.W. Rushforth, A.W. Campion, R.P. Gallagher, B.L. |
| author_facet | Wang, M. Marshall, R.A. Edmonds, K.W. Rushforth, A.W. Campion, R.P. Gallagher, B.L. |
| author_sort | Wang, M. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | In this paper, we use simultaneous magnetometry and electrical transport measurements to critically examine ways in which the Curie temperature (TC) values have been determined in studies of dilute magnetic semiconductors. We show that, in sufficiently homogeneous samples, TC can be accurately determined from remanent magnetization and magnetic susceptibility and from the positions of the peak in the temperature derivative of the resistivity. We also show that the peak of the resistivity does not occur at TC, as illustrated by a (Ga,Mn)As sample for which the peak of the resistivity is at 21361K when TC is only 17861K |
| first_indexed | 2025-11-14T19:22:27Z |
| format | Article |
| id | nottingham-34352 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:22:27Z |
| publishDate | 2014 |
| publisher | American Institute of Physics |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-343522020-05-04T16:47:12Z https://eprints.nottingham.ac.uk/34352/ Determining Curie temperatures in dilute ferromagnetic semiconductors: high Curie temperature (Ga,Mn)As Wang, M. Marshall, R.A. Edmonds, K.W. Rushforth, A.W. Campion, R.P. Gallagher, B.L. In this paper, we use simultaneous magnetometry and electrical transport measurements to critically examine ways in which the Curie temperature (TC) values have been determined in studies of dilute magnetic semiconductors. We show that, in sufficiently homogeneous samples, TC can be accurately determined from remanent magnetization and magnetic susceptibility and from the positions of the peak in the temperature derivative of the resistivity. We also show that the peak of the resistivity does not occur at TC, as illustrated by a (Ga,Mn)As sample for which the peak of the resistivity is at 21361K when TC is only 17861K American Institute of Physics 2014-04-03 Article PeerReviewed Wang, M., Marshall, R.A., Edmonds, K.W., Rushforth, A.W., Campion, R.P. and Gallagher, B.L. (2014) Determining Curie temperatures in dilute ferromagnetic semiconductors: high Curie temperature (Ga,Mn)As. Applied Physics Letters, 104 . 132406/1-132406/4. ISSN 1077-3118 http://scitation.aip.org/content/aip/journal/apl/104/13/10.1063/1.4870521 doi:10.1063/1.4870521 doi:10.1063/1.4870521 |
| spellingShingle | Wang, M. Marshall, R.A. Edmonds, K.W. Rushforth, A.W. Campion, R.P. Gallagher, B.L. Determining Curie temperatures in dilute ferromagnetic semiconductors: high Curie temperature (Ga,Mn)As |
| title | Determining Curie temperatures in dilute ferromagnetic semiconductors: high Curie temperature (Ga,Mn)As |
| title_full | Determining Curie temperatures in dilute ferromagnetic semiconductors: high Curie temperature (Ga,Mn)As |
| title_fullStr | Determining Curie temperatures in dilute ferromagnetic semiconductors: high Curie temperature (Ga,Mn)As |
| title_full_unstemmed | Determining Curie temperatures in dilute ferromagnetic semiconductors: high Curie temperature (Ga,Mn)As |
| title_short | Determining Curie temperatures in dilute ferromagnetic semiconductors: high Curie temperature (Ga,Mn)As |
| title_sort | determining curie temperatures in dilute ferromagnetic semiconductors: high curie temperature (ga,mn)as |
| url | https://eprints.nottingham.ac.uk/34352/ https://eprints.nottingham.ac.uk/34352/ https://eprints.nottingham.ac.uk/34352/ |