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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.

Authors

M. Wang

R.A. Marshall

K.W. Edmonds

A.W. Rushforth

R.P. Campion

B.L. Gallagher



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

Journal Article Type Article
Publication Date Apr 3, 2014
Journal Applied Physics Letters
Print ISSN 0003-6951
Electronic ISSN 1077-3118
Publisher AIP Publishing
Peer Reviewed Peer Reviewed
Volume 104
Article Number 132406
APA6 Citation Wang, M., Marshall, R., Edmonds, K., Rushforth, A., Campion, R., & Gallagher, B. (2014). Determining Curie temperatures in dilute ferromagnetic semiconductors: high Curie temperature (Ga,Mn)As. Applied Physics Letters, 104, https://doi.org/10.1063/1.4870521
DOI https://doi.org/10.1063/1.4870521
Publisher URL http://scitation.aip.org/content/aip/journal/apl/104/13/10.1063/1.4870521
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
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.

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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