Electrical detection of magnetization reversal without auxiliary magnets

Abstract

First-generation magnetic random access memories based on anisotropic magnetoresistance required magnetic fields for both writing and reading. Modern all-electrical read/write memories use instead non-relativistic spin-transport connecting the storing magnetic layer with a reference ferromagnet. Recent studies have focused on electrical manipulation of magnetic moments by relativistic spin-torques requiring no reference ferromagnet. Here we report the observation of a counterpart magnetoresistance effect in such a relativistic system which allows us to electrically detect the sign of the magnetization without an auxiliary magnetic field or ferromagnet. We observe the effect in a geometry in which the magnetization of a uniaxial (Ga,Mn)As epilayer is set either parallel or antiparallel to a current-induced non-equilibrium spin polarization of carriers. In our structure, this linear-in-current magnetoresistance reaches 0.2\% at current density of $10^6$ A cm${}^{-2}$.

arXiv comment5 pages, 4 figures

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Cited by in corpus (46)

• Antiferromagnetic spintronics
• Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems
• Unidirectional spin Hall magnetoresistance in ferromagnet/normal metal bilayers
• Large Unidirectional Magnetoresistance in a Magnetic Topological Insulator
• Bilinear magneto-electric resistance as a probe of three-dimensional spin texture in topological surface states
• Current-nonlinear Hall effect and spin-orbit torque magnetization switching in a magnetic topological insulator
• Nonlinear planar Hall effect
• Origins of the unidirectional spin Hall magnetoresistance in metallic bilayers
• Theory of spin Hall magnetoresistance (SMR) and related phenomena
• Theory of unidirectional spin Hall magnetoresistance in heavy-metal/ferromagnetic-metal bilayers
• Magnetoresistance of heavy and light metal/ferromagnet bilayers
• Observation of Large Unidirectional Rashba Magnetoresistance in Ge(111)
• Theory of bi-linear magnetoresistance within the minimal model for surface states in topological insulators
• Role of hidden spin polarization in non-reciprocal transport of antiferromagnets
• Symmetry analysis of current-induced switching of antiferromagnets
• Giant unidirectional magnetoresistance in topological insulator -- ferromagnetic semiconductor heterostructures
• Determination of spin-orbit torque efficiencies in heterostructures with in-plane magnetic anisotropy
• Unidirectional orbital magnetoresistance in light metal/ferromagnet bilayers
• Thickness dependence of unidirectional spin-Hall magnetoresistance in metallic bilayers
• On the separation of Hall and Ohmic nonlinear responses
• Large and Robust Charge-to-Spin Conversion in Sputtered Conductive WTex with Disorder
• Unidirectional Magnetoresistance in Antiferromagnet/Heavy-metal bilayers
• Large unidirectional spin Hall and Rashba-Edelstein magnetoresistance in topological insulator/magnetic insulator heterostructures
• Relation between unidirectional spin Hall magnetoresistance and spin current-driven magnon generation
• Chiral anisotropic magnetoresistance of ferromagnetic helices
• Theory of bilinear magneto-electric resistance from topological-insulator surface states
• Dynamical amplification of magnetoresistances and Hall currents up to the THz regime
• Quantum kinetic theory of quadratic responses
• Dynamical current-induced ferromagnetic and antiferromagnetic resonances
• Large Unidirectional Magnetoresistance in Metallic Heterostructures in the Spin Transfer Torque Regime
• Interface spin polarization of the Heusler compound Co2MnSi probed by unidirectional spin Hall magnetoresistance
• Spin-orbit torques and their associated effective fields from gigahertz to terahertz
• Spin anomalous-Hall unidirectional magnetoresistance
• Unidirectional spin Hall magnetoresistance in topological insulator/ferromagnetic layer heterostructures
• Quantum unidirectional magnetoresistance
• Theory of the Anomalous Tunnel Hall Effect at Ferromagnet-Semiconductor Junctions
• Non-reciprocal magnetoresistance, directional inhomogeneity and mixed symmetry Hall devices
• Proximity-induced nonlinear magnetoresistances on topological insulators
• Current-induced asymmetric magnetoresistance due to energy transfer via quantum spin-flip process
• Evidence for spin swapping from modulation of transverse resistance in magnetic heterostructures with Rashba interface
• Nonlinear response induced by Ferromagnetism in a Noncentrosymmetric Kondo Lattice system
• Microscopic theory of Rashba-Edelstein magnetoresistance
• Unidirectional spin Hall magnetoresistance and spin-orbit torques in HM${}_1$/Co/HM${}_2$ trilayer systems
• Theory of unidirectional magnetoresistance and nonlinear Hall effect
• Fluctuation theorem for spin transport at insulating ferromagnetic junctions
• Unidirectional magnetoresistance and spin-orbit torque in NiMnSb