Giant Zeeman effect for Mn in wide gap semiconductors: (Ga,Mn)N and (Zn,Mn)O

Wojciech Pacuski 1,2David Ferrand 2Piotr Kossacki 1Joël Cibert 3Jan A. Gaj 1Andrzej Golnik 1Stephan Marcet 2Ekaterina Chikoidze 4Yves Dumont 4Eirini Sarigiannidou 2Henri Mariette 2

1. Warsaw University, Faculty of Physics, Hoża 69, Warszawa 00-681, Poland
2. CNRS-CEA-UJF group Nanophysique et Semiconducteurs, 140 Ave. de la Physique BP87, Grenoble 38402, France
3. Laboratoire Louis Néel, CNRS (LLN), 25 Av. des Martyrs, Grenoble 38042, France
4. CNRS, Laboratoire de Physique des Solides et de Cristallogenese, 1 Place Aristide Briand, Meudon F 92195, France


We present a magneto-optical study of the coupling between Manganese spin and band carriers in wide bandgap diluted magnetic semiconductors (DMS). We use reflectivity, transmission and photoluminescence. We analyze similarities and differences between the giant Zeeman effect in (Ga,Mn)N and in (Zn,Mn)O.
ZnO and GaN are wide bandgap semiconductors with the wurtzite structure, with a weak spin-orbit coupling and a strong electron-hole exchange interaction within the excitons. This combination was an origin of controversies in the determination of basic material parameters. It results also in a complex behavior of the giant Zeeman effect of A and B excitons in the presence of magnetic impurities. It was shown for (Zn,Co)O [1], that not only the transition energies, but also the oscillator strengths are strongly affected by spin-carrier coupling.
We studied (Ga,Mn)N epilayers (grown by MBE), in which most of the Mn ions are in the d4 electronic configuration (Mn3+) with spin S=2 [2]. In the wurtzite structure, spin-orbit coupling in Mn3+ leads to a significant spin anisotropy, with the c-axis as a hard axis. We analyzed the circular polarization causes by the giant Zeeman effect, and we find a ferromagnetic p-d exchange. It is the same sign as in the case of Cr2+ in II-VI DMS's - another example of the d4 electronic configuration.
In ZnO, as in other II-VI's, Mn ions are in Mn2+ state with spin 5/2 and zero orbital momentum. Then the anisotropy is negligible. Thus, the temperature and magnetic-field dependence of the giant Zeeman effect in (Zn,Mn)O follows the usual Brillouin function. Assuming the "normal ordering" for the valence band in (Zn,Mn)O samples grown by MOCVD, the p-d exchange is found to be antiferromagnetic for Mn2+, as for Co2+ [1].
[1] W.Pacuski et al., Phys. Rev. B 73, 035214 (2006)
[2] S.Marcet et al., cond-mat/0604025 (2006)

Legal notice
  • Legal notice:

    Copyright (c) Pielaszek Research, all rights reserved.
    The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
    In every case, proper references including Author(s) name(s) and URL of this webpage: must be provided.


Related papers
  1. MBE grown microcavities based on selenide and telluride compounds
  2. Tuning of MBE growth of AlGaInAs-based microcavities with embedded QDots or QWells
  3. Influence of Mn δ-doping on formation of CdTe/ZnTe quantum dots with single magnetic ions
  4. Photoluminescence studies of giant Zeeman effect in MBE-grown cobalt-based dilute magnetic semiconductors
  5. Growth of ZnTe - based microcavities on GaSb substrates
  6. New concepts for ZnTe-based microcavities
  7. Exploring the optical and electrical properties of SrCu2O2: theoretical and experimental studies
  8. Optical and electrical properties of oriented SrCu2O2 thin films grown by pulsed laser deposition
  9. Undoped and Al-doped ZnO films with tuned properties by pulsed laser deposition
  10. Effect of Chlorine doping on electrical and optical properties of ZnO thin films
  11. Catalytic growth by molecular beam epitaxy and properties of ZnTe-based semiconductor nanowires
  12. Ferromagnetic oxide semiconductors: using off-stoichiometry to tune low-dimension magnetism and consequently the iron valency
  13. Ferromagnetic oxide semiconductors: using off-stoichiometry to tune low-dimension magnetism and consequently the iron valency
  14. Manipulating the spin states of a single magnetic atom in a II-VI quantum dot.
  15. Optical and magnetooptical properties of the p-type ZnMnO.
  16. LaNiO3 - a high temperature electrode studied by in situ spectroscopic ellipsometry
  17. Excitons in ZnO/Zn1-xMnxO quantum wells
  18. ZnO:Mn DMS - growth and characterization
  19. High Curie temperature ferromagnetism in self-organized Ge1‑xMnx nano-columns
  20. Ferromagnetic oxide semiconductors: using off-stoichiometry to tune low-dimension magnetism and consequently the iron valency

Presentation: Oral at E-MRS Fall Meeting 2006, Symposium E, by Wojciech Pacuski
See On-line Journal of E-MRS Fall Meeting 2006

Submitted: 2006-05-15 23:38
Revised:   2009-06-07 00:44
© 1998-2021 pielaszek research, all rights reserved Powered by the Conference Engine