Phys. Rev. Lett. 86, 4644–4647 (2001)

Magnetization Measurements of Magnetic Two-Dimensional Electron Gases

Abstract

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J. G. E. Harris¹, R. Knobel², K. D. Maranowski³, A. C. Gossard³, N. Samarth², and D. D. Awschalom^1,*
¹Department of Physics, University of California, Santa Barbara, California 93106
²Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802
³Department of Electrical and Computer Engineering, University of California, Santa Barbara, California 93106

Received 22 June 2000; published in the issue dated 14 May 2001

We directly measure the magnetization of both the conduction electrons and Mn²⁺ ions in (Zn,Cd,Mn)Se two-dimensional electron gases (2DEGs) by integrating them into ultrasensitive micromechanical magnetometers. The interplay between spin and orbital energy in these magnetic 2DEGs causes Landau level degeneracies at the Fermi energy. These Landau level crossings result in novel features in the de Haas–van Alphen oscillations, which are quantitatively reproduced by a simple model.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.86.4644

DOI:

10.1103/PhysRevLett.86.4644

PACS:

73.43.-f, 07.10.Cm, 75.50.Pp, 76.30.Fc

^*Corresponding author.Email address: awsch@physics.ucsb.edu

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Phys. Rev. Lett. 86, 4644–4647 (2001)

Magnetization Measurements of Magnetic Two-Dimensional Electron Gases