Magnetotransport in periodic magnetic fields

By depositing an array of ferromagnetic dysprosium wires on top of a high-mobility two-dimensional electron gas (2DEG) we generate a one-dimensional periodic magnetic field with periods between a = 500nm and 1 μm, giving rise to magnetic commensurability oscillations of the magnetoresistance ρ xx. H...

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Bibliographic Details
Published inSurface science Vol. 361; pp. 337 - 340
Main Authors Ye, P.D., Weiss, D., Gerhardts, R.R., von Klitzing, K., Eberl, K., Nickel, H.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.01.1996
Subjects
Dysprosium
Electrical transport
Electrical transport measurements
Gallium arsenide
Heterojunctions
Quantum effects
Heterojunctions
Electrical transport measurements
Quantum effects
Dysprosium
Gallium arsenide
Electrical transport
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Summary:By depositing an array of ferromagnetic dysprosium wires on top of a high-mobility two-dimensional electron gas (2DEG) we generate a one-dimensional periodic magnetic field with periods between a = 500nm and 1 μm, giving rise to magnetic commensurability oscillations of the magnetoresistance ρ xx. Here we study the commensurability oscillations as a function of the angle θ between the Dy wires and the Hall bar. For parallel orientation of the wires we find pronounced anomalies at intermediate magnetic fields which we ascribe to overlapping, modulation-broadened, Landau bands.
ISSN:0039-6028
1879-2758
DOI:10.1016/0039-6028(96)00416-5