Spin flop and crystalline anisotropic magnetoresistance in CuMnAs

Abstract

Recent research works have shown that the magnetic order in some antiferromagnetic materials can be manipulated and detected electrically, due to two physical mechanisms: Neel-order spin-orbit torques and anisotropic magnetoresistance. While these observations open up opportunities to use antiferromagnets for magnetic memory devices, different physical characterization methods are required for a better understanding of those mechanisms. Here we report a magnetic field induced rotation of the antiferromagnetic Neel vector in epitaxial tetragonal CuMnAs thin films. Using soft x-ray magnetic linear dichroism spectroscopy, x-ray photoemission electron microscopy, integral magnetometry and magneto-transport methods, we demonstrate spin-flop switching and continuous spin reorientation in antiferromagnetic films with uniaxial and biaxial magnetic anisotropies, respectively. From field-dependent measurements of the magnetization and magnetoresistance, we obtain key material parameters including the anisotropic magnetoresistance coefficients, magnetocrystalline anisotropy, spin-flop and exchange fields.

arXiv comment26 pages, 6 figures

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Cited by in corpus (25)

• Coexistence of Anomalous Hall Effect and Weak Net Magnetization in Collinear Antiferromagnet MnTe
• Quenching of an antiferromagnet into high resistivity states using electrical or ultrashort optical pulses
• Nonlinear terahertz Néel spin-orbit torques in antiferromagnetic Mn${}_2$Au
• Readout of a antiferromagnetic spintronics systems by strong exchange coupling of Mn2Au and Permalloy
• Magnetoresistance effects in the metallic antiferromagnet Mn${}_2$Au
• Atomically sharp domain walls in an antiferromagnet
• Magneto-Seebeck microscopy of domain switching in collinear antiferromagnet CuMnAs
• Improved-Sensitivity Integral SQUID Magnetometry of (Ga,Mn)N Thin Films in Proximity to Mg-doped GaN
• A Simplified Method of the Assessment of Magnetic Anisotropy of Commonly Used Sapphire Substrates in SQUID Magnetometers
• Anisotropic magneto-thermal transport in Co${}_2$MnGa thin films
• Hysteretic effects and magnetotransport of electrically switched CuMnAs
• Magnetocrystalline anisotropy of the easy-plane metallic antiferromagnet Fe${}_2$As
• Low-Energy Switching of Antiferromagnetic CuMnAs/ GaP Using sub-10 Nanosecond Current Pulses
• Room temperature weak collinear ferrimagnet with symmetry driven, large intrinsic magneto-optic signatures
• In Situ Compensation Method for Precise Integral SQUID Magnetometry of Miniscule Biological, Chemical, and Powder Specimens Requiring the Use of Capsules
• Magnetic Phase Diagram of Mn3+xSn1-x Epitaxial Thin Films: Extending the Anomalous Hall Effect to Low Temperatures via Intrinsic Alloying
• In-plane magnetic structure and exchange interactions in the high-temperature antiferromagnet Cr2Al
• Anisotropic magnetotransport in the layered antiferromagnet TaFe${}_{1.25}$Te${}_3$
• Picosecond transfer from short-term to long-term memory in analog antiferromagnetic memory device
• Four-fold Anisotropic Magnetoresistance in Antiferromagnetic Epitaxial Thin Films of MnPt${}_x$Pd${}_{1-x}$
• Probing the Manipulation of Antiferromagnetic Order in CuMnAs Films Using Neutron Diffraction
• Coexistence of Antiferromagnetic Cubic and Ferromagnetic Tetragonal Polymorphs in Epitaxial CuMnSb
• Persistence of large and gate-tunable anisotropic magnetoresistance in an atomically thin antiferromagnet
• Reliable Magnetometry for Antiferromagnets and Thin Films: Correcting Substrate Artifacts in Mn3Sn/MgO Systems
• Nonlinear Magnetoelectric Edelstein Effect