Large tunneling anisotropic magnetoresistance in (Ga,Mn)As nanoconstrictions

Abstract

We report a large tunneling anisotropic magnetoresistance (TAMR) in a thin (Ga,Mn)As epilayer with lateral nanoconstrictions. The observation establishes the generic nature of this effect, which originates from the spin-orbit coupling in a ferromagnet and is not specific to a particular tunnel device design. The lateral geometry allows us to link directly normal anisotropic magnetoresistance (AMR) and TAMR. This indicates that TAMR may be observable in other materials showing a comparable AMR at room temperature, such as transition metal alloys.

4 pages, 4 figures

References in corpus (9)

• Giant Planar Hall Effect in Epitaxial (Ga,Mn)As Devices
• Tunneling Anisotropic Magnetoresistance: A spin-valve like tunnel magnetoresistance using a single magnetic layer
• Very large magnetoresistance in lateral ferromagnetic (Ga,Mn)As wires with nanoconstrictions
• 1500-fold Tunneling Anisotropic Magnetoresistance in a (Ga,Mn)As stack
• Anisotropic Magnetoresistance in Ga${}_{1-x}$Mn${}_x$As
• DC-transport properties of ferromagnetic (Ga,Mn)As semiconductors
• High quality GaMnAs films grown with As dimers
• Tunnel Magneto-resistance in GaMnAs: going beyond Jullière formula
• Ferromagnetism in Diluted Magnetic Semiconductor Heterojunction Systems

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