Journal
PHYSICAL REVIEW B
Volume 78, Issue 15, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.78.155310
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The domain-wall-induced reversal dynamics in compressively strained Ga(1-x)Mn(x)As was studied employing the magneto-optical Kerr effect and Kerr microscopy. Due to the influence of a uniaxial part in the in-plane magnetic anisotropy 90 degrees +/-delta domain walls with considerably different dynamic behavior are observed. While the 90 degrees+delta reversal is identified to be propagation dominated with a small number of domains, the case of 90 degrees-delta reversal involves a larger number of nucleation centers. The domain-wall nucleation/propagation energies epsilon for both transitions are estimated using model calculations from which we conclude that single domain devices can be achievable using the 90 degrees+delta mode.
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