Determining Curie temperatures in dilute ferromagnetic semiconductors: high Curie temperature (Ga,Mn)As

Wang, M. and Marshall, R. A. and Edmonds, K. W. and Rushforth, A. W. and 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

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Abstract

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

Item Type: Article
Additional Information: Determining Curie temperatures in dilute ferromagnetic semiconductors: high Curie temperature (Ga,Mn)As, M. Wang, R.A. Marshall, K.W. Edmonds, A.W. Rushforth, R.P. Campion, and B.L. Gallagher. Applied Physics Letters 104, 132406 (2014); doi:10.1063/1.4870521.
Schools/Departments: University of Nottingham UK Campus > Faculty of Science > School of Physics and Astronomy
Identification Number: https://doi.org/10.1063/1.4870521
Depositing User: Rushforth, Andrew
Date Deposited: 23 Jun 2016 12:54
Last Modified: 24 Sep 2016 04:45
URI: http://eprints.nottingham.ac.uk/id/eprint/34352

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