6533b85bfe1ef96bd12bb50d
RESEARCH PRODUCT
Unusual domain-wall motion in ferromagnetic semiconductor films with tetragonal anisotropy
A. DourlatVincent JeudyVincent JeudyKh. KhazenA. CēbersAristide LemaîtreCatherine Gourdonsubject
010302 applied physicsPhysicsCondensed matter physicsMagnetic domainDemagnetizing fieldCondensed Matter PhysicsMagnetocrystalline anisotropy01 natural sciencesMagnetic susceptibilityElectronic Optical and Magnetic MaterialsMagnetic anisotropyDomain wall (magnetism)Magnetic shape-memory alloy0103 physical sciences[PHYS.COND]Physics [physics]/Condensed Matter [cond-mat]Single domain010306 general physicsdescription
International audience; Magnetic field-driven domain-wall propagation in the flow regime is investigated in (Ga, Mn) As ferromagnetic semiconductor layers. Square-shape magnetic domains with an unexpected orientation of their edges, at pi/8 with respect to the anisotropy axes, are found. This is shown to arise from the effect of tetragonal magnetic anisotropy on domain-wall dynamics. Using a one-dimensional model for domain-wall motion and modeling domain growth by contour dynamics the shape and orientation of domains and their field range for existence are well reproduced. These results point to the key role of the vectorial nature of the order parameter in the dynamics of ferromagnetic domains.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-10-13 | Physical Review B |