Abstract

We present detailed experimental measurements and simulations of the field-dependent magnetization and magnetoresistance in the vicinity of the Curie temperature in the highly disordered dilute ferromagnetic semiconductor (Ga,Mn)As. The observed dependence of the magnetization on external magnetic field and temperature is consistent with three-dimensional Heisenberg equation of state calculations including a narrow distribution of critical temperatures. The magnetoresistance shows a peak at the Curie temperature due to the suppression of magnetic scattering in an applied magnetic field, which is well-described by considering changes in the square of the magnetization induced by the magnetic field.

Details

Title
Magnetism and magnetoresistance in the critical region of a dilute ferromagnet
Author
Wang, M 1 ; Howells, B 1 ; Marshall, R A 1 ; Taylor, J M 1 ; Edmonds, K W 1 ; Rushforth, A W 1 ; Campion, R P 1 ; Gallagher, B L 1 

 University of Nottingham, School of Physics and Astronomy, Nottingham, UK (GRID:grid.4563.4) (ISNI:0000 0004 1936 8868) 
Publication year
2021
Publication date
2021
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2480996154
Copyright
© The Author(s) 2021. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.