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Symmetry effects on the static and dynamic properties of coupled magnetic oscillators
J P. Patchett, M. Drouhin, J. W. Liao +7
The effect of symmetry on the resonance spectra of antiferromagnetically coupled oscillators has attracted new interest with the discovery of symmetry-breaking induced anti-crossin…
Imaging and writing magnetic domains in the non-collinear antiferromagnet MnSn
Helena Reichlova, Tomas Janda, Joao Godinho +12
Harnessing the unique properties of non-collinear antiferromagnets (AFMs) will be essential for exploiting the full potential of antiferromagnetic spintronics. Indeed, many of the…
Nano scale thermo-electrical detection of magnetic domain wall propagation
Patryk Krzysteczko, James Wells, Alexander Fernandez Scarioni +12
In magnetic nanowires with perpendicular magnetic anisotropy (PMA) magnetic domain walls (DW) are narrow and can move rapidly driven by current induced torques. This enables import…
Inertial displacement of a domain wall excited by ultra-short circularly polarized laser pulses
T. Janda, P. E. Roy, R. M. Otxoa +9
Domain wall motion driven by ultra-short laser pulses is a prerequisite for envisaged low-power spintronics combining storage of information in magneto electronic devices with high…
Efficient conversion of light to charge and spin in Hall-bar microdevice
L. Nádvorník, J. A. Haigh, K. Olejník +4
We report an experimental demonstration of a local amplification of the spin Hall voltage using an expanding depletion zone at a pn-junction in GaAs/AlGaAs Hall-bar microdevices. I…
Robust Picosecond writing of a Layered Antiferromagnet by Staggered Spin-Orbit-Fields
P. E. Roy, R. M. Otxoa, J. Wunderlich
Ultrafast electrical switching by current-induced staggered spin-orbit fields, with minimal risk of overshoot, is shown in layered easy-plane antiferromagnets with basal-plane biax…
Nanosecond spin-transfer over tens of microns in a bare GaAs/AlGaAs layer
L. Nádvorník, P. Němec, T. Janda +8
The spin-conserving length-scale is a key parameter determining functionalities of a broad range of spintronic devices including magnetic multilayer spin-valves in the commercializ…
Reconfigurable Boolean Logic using Magnetic Single-Electron Transistors
M. F. Gonzalez-Zalba, C. Ciccarelli, L. P. Zarbo +6
We propose a novel hybrid single-electron device for reprogrammable low-power logic operations, the magnetic single-electron transistor (MSET). The device consists of an aluminium…
Optical spin transfer torque driven domain wall motion in ferromagnetic semiconductor
A. J. Ramsay, P. E. Roy, J. A. Haigh +6
We demonstrate optical manipulation of the position of a domain wall in a dilute magnetic semiconductor, GaMnAsP. Two main contributions are identified. Firstly, photocarrier spin…
Observation of a Berry phase anti-damping spin-orbit torque
H. Kurebayashi, Jairo Sinova, D. Fang +10
Recent observations of current-induced magnetization switching at ferromagnet/normal-conductor interfaces have important consequences for future magnetic memory technology. In one…
Spin and Orbital Splitting in Ferromagnetic Contacted Single Wall Carbon Nanotube Devices
K. Y. Wang, A. M. Blackburn, H. F. Wang +2
We observed the coulomb blockade phenomena in ferromagnetic contacting single wall semiconducting carbon nanotube devices. No obvious Coulomb peaks shift was observed with existing…
Spin gating electrical current
C. Ciccarelli, L. P. Zarbo, A. C. Irvine +5
We use an aluminium single electron transistor with a magnetic gate to directly quantify the chemical potential anisotropy of GaMnAs materials. Uniaxial and cubic contributions to…
Spin-orbit driven ferromagnetic resonance: A nanoscale magnetic characterisation technique
D. Fang, H. Kurebayashi, J. Wunderlich +7
We demonstrate a scalable new ferromagnetic resonance (FMR) technique based on the spin-orbit interaction. An alternating current drives FMR in uniform ferromagnetic structures pat…
Spin-injection Hall effect in a planar photovoltaic cell
J. Wunderlich, A. C. Irvine, Jairo Sinova +5
Successful incorporation of the spin degree of freedom in semiconductor technology requires the development of a new paradigm allowing for a scalable, non-destructive electrical de…
Magneto-optical and micromagnetic simulation study the current driven domain wall motion in ferromagnetic (Ga,Mn)As
K. Y. Wang, A. C. Irvine, R. P. Campion +4
We have studied current-driven domain wall motion in modified Ga_0.95Mn_0.05As Hall bar structures with perpendicular anisotropy by using spatially resolved Polar Magneto-Optical K…
Magnetic reversal under external field and current-driven domain wall motion in (Ga,Mn)As: influence of extrinsic pinning
K Y Wang, A C Irvine, J Wunderlich +6
We investigate the anisotropy of magnetic reversal and current-driven domain wall motion in annealed Ga_0.95Mn_0.05As thin films and Hall bar devices with perpendicular magnetic an…
The Origin and Control of the Sources of AMR in (Ga,Mn)As Devices
A. W. Rushforth, K. Výborný, C. S. King +11
We present details of our experimental and theoretical study of the components of the anisotropic magnetoresistance (AMR) in (Ga,Mn)As. We develop experimental methods to yield dir…
Magnetocrystalline anisotropy controlled local magnetic configurations in (Ga,Mn)As spin-transfer-torque microdevices
J. Wunderlich, A. C. Irvine, J. Zemen +11
The large saturation magnetization in conventional dense moment ferromagnets offers flexible means of manipulating the ordered state through demagnetizing shape anisotropy fields b…
Anisotropic Magnetoresistance components in (Ga,Mn)As
A. W. Rushforth, K. Výborný, C. S. King +11
Our experimental and theoretical study of the non-crystalline and crystalline components of the anisotropic magnetoresistance (AMR) in (Ga,Mn)As is aimed at exploring the basic phy…
Low-dimensional light-emitting transistor with tunable recombination zone
B. Kaestner, J. Wunderlich, T. J. B. M. Janssen
We present experimental and numerical studies of a light-emitting transistor comprising two quasi-lateral junctions between a two-dimensional electron and hole gas. These lithograp…
Co-planar spin-polarized light emitting diode
B. Kaestner, J. Wunderlich, Jairo Sinova +1
Studies of spin manipulation in semiconductors has benefited from the possibility to grow these materials in high quality on top of optically active III-V systems. The induced elec…
Experimental observation of the spin-Hall effect in a two dimensional spin-orbit coupled semiconductor system
Joerg Wunderlich, Bernd Kaestner, Jairo Sinova +1
We report the experimental observation of the spin-Hall effect in a two-dimensional (2D) hole system with Rashba spin-orbit coupling. The 2D hole layer is a part of a p-n junction…
Large tunneling anisotropic magnetoresistance in (Ga,Mn)As nanoconstrictions
A. D. Giddings, M. N. Khalid, J. Wunderlich +10
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…