Magnetization dynamics down to zero field in dilute (Cd,Mn)Te quantum wells

Abstract

The evolution of the magnetization in (Cd,Mn)Te quantum wells after a short pulse of magnetic field was determined from the giant Zeeman shift of spectroscopic lines. The dynamics in absence of magnetic field was found to be up to three orders of magnitude faster than that at 1 T. Hyperfine interaction and strain are mainly responsible for the fast decay. The influence of a hole gas is clearly visible: at zero field anisotropic holes stabilize the system of Mn ions, while in a magnetic field of 1 T they are known to speed up the decay by opening an additional relaxation channel.

References in corpus (5)

• Light and electric field control of ferromagnetism in magnetic quantum structures
• Single Electron Transport in electrically tunable nanomagnets
• p-Type doping of II-VI heterostructures from surface states: application to ferromagnetic Cd${}_{1-x}$Mn${}_x$Te quantum wells
• Photoluminescence of p-doped quantum wells with strong spin splitting
• Coherent dynamics of localized spins coupled with a two-dimensional hole gas in diluted-magnetic quantum wells

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• Optical orientation of a single Mn spin in a quantum dot: Role of carrier spin relaxation
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• The effect of impurities on spin polarized Zeeman bound states in dilute magnetic semiconductor-superconductor hybrids
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• Synchronous Spatial Oscillation of Electron- and Mn-Spin Polarizations in Dilute-Magnetic-Semiconductor Quantum Wells under Spin-Orbit Effective Magnetic Fields
• Mechanisms of optical orientation of an individual Mn${}^{2+}$ ion spin in a II-VI quantum dot
• Dynamical Magnetic and Nuclear Polarization in Complex Spin Systems: Semi-magnetic II-VI Quantum Dots