Asymmetric Magnetization Reversal in the Exchange-Biased MnO/(Ga,Mn)As Heterostructure Studied by Ferromagnetic Resonance |
| K. Dziatkowskia, b, Z. Geb, X. Liub, J.K. Furdynab and A. Twardowskia
aInstitute of Experimental Physics, Warsaw University, Hoża 69, 00-681 Warsaw, Poland bDepartment of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA |
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| Received: 17 06 2006; |
| We report ferromagnetic resonance study of the magnetization reversal in the exchange-coupled MnO/(Ga,Mn)As system. The low-field parts of ferromagnetic resonance spectra measured along [1/10] and [100] directions of (Ga,Mn)As were combined into hysteresis loops, which under field-cooling conditions similarly to SQUID loops are shifted toward negative magnetic fields. The magnetization reversal process revealed by the loops occurred remarkably asymmetric for both sample configurations. |
| DOI: 10.12693/APhysPolA.110.319 PACS numbers: 75.50.Pp, 76.50.+g, 75.30.Gw, 75.70.Cn |