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The magnetization kinetics in (Zn,Mn)Se/(Zn,Be)Se quantum wells has beenstudied on a ps-time scale after pulsed laser excitation. The magnetizationinduced by an external magnetic field is reduced by up to 30% during ~100 psdue to spin and energy transfer from photocarriers to Mn spin system. The giantZeeman splitting leads to a complete spin polarization of the carriers,resulting in a strong suppression of flip-flop processes between carriers andmagnetic ions. Therefore a multiple angular momentum transfer from eachspin-polarized hole to the Mn ions becomes the dominant mechanism in themagnetization dynamics. A model based on spin-momentum coupling in the valenceband is suggested for explaining this transfer.Comment: 17 pages including 4 figures. Manuscript has been submitted to Phys.  Rev.

physical review. b, condensed matter and materials physics

Multiple transfer of angular momentum quanta from a spin-polarized hole to magnetic ions in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mi>Zn</mml:mi><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mi>Mn</mml:mi><mml:mi>x</mml:mi></mml:msub><mml:mi>Se</mml:mi><mml:mo>∕</mml:mo><mml:msub><mml:mi>Zn</mml:mi><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>y</mml:mi></mml:mrow></mml:msub…

Multiple transfer of angular momentum quanta from a spin-polarized hole to magnetic ions inZn1−xMnxSe∕Zn1−y